Your SEO optimized title

Filter By:

  • Show More Brands

  • Show Fewer Brands

Trainers/Rollers

Spinervals Minute Mania 48.0
$24.95
Top athletes and coaches know the value of high intensity work for athletic performance enhancement, and in developing their body's maximum oxygen carrying capacity, also known as VO2max. This clever yet diabolical workout includes work that'll boost your lactate threshold, as well as two strategically placed 3-minute 'time trials', also known as Critical Power Intervals, designed to test the mettle, power, and recuperative abilities of even the most experienced cyclist. Done regularly in a smartly conceived training program, 3-Minute Mania will deliver incredible results at your next competitive cycling event. - Duration: 60 Minutes - Intensity: 9.8 - Purpose: 1-hour session, including effective 3-minute VO2max building benchmark test sets
Spinervals On the Road 3.0 - Tucson Training Rides
$12.99 $29.95 57% Off
On the Road with Coach Troy - Virtual Reality Cycling Workout Series Volume 3: Tucson Training Rides Duration: This disk contains two - 60 Minute+ Workouts Difficulty Rating: 9.5 This DVD contains music+voice and voice-only audio tracks. Cycle in the high desert splendor of Tucson Arizona with Coach Troy! In this virtual reality cycling DVD, you'll enjoy the incredible desert scenery of Tucson Arizona as you ride on Troy's wheel, listening to his coaching advice along the way.
Spinervals Spinervals Training/ Workout DVDs
$9.99 - $18.00 $24.95 Up to 60% Off
Never settle. Learn to fly. Train with the Spinerval DVD series. Designed to make you a better, faster, stronger, hungrier rider every time you get in the saddle. No spin class comes close. These workouts push you harder. Longer. Truer. Try one. Try them all. Variety means results. The five most popular Spinerval training DVDs.
Spinervals Triathlon Builder DVD 5-Pack
$60.00 $109.95 45% Off
Success at triathlon requires a balanced approach to bike and run training. Top coaches and triathletes have discovered that a combination of endurance training, interval training and transition or 'brick' workouts are best for improving one's ability to run strong off the bike. The Triathlon Performance 5-Pack delivers five great DVD's from Coach Troy's training series that will enhance a triathlete's speed when running off the bike as well as their general overall conditioning. The workouts included in this 5-Pack:
  • Spinervals 10.0 - Ride and Stride (The Ultimate 'Brick' Workout)
  • Spinervals 13.0 - Tough Love (3 Hours of Endurance)
  • Spinervals 22.0 - Time Trialapalooza (An Incredible Lesson in Time Trialing)
  • Runervals 2.0 - Treadmill Tempo (Build Strength on the Treadmill)
  • UltraConditioning 3.0 - Ultra Full Body (Overall Strength and Conditioning)
Spinervals UltraConditioning 2.0 - Ultra CORE-Strength Builder
$15.00 $24.95 40% Off
Combining a Technique Cycling Focus with CORE Strength & Conditioning Spinervals UltraConditioning 2.0 - "Ultra Core-Strength Builder" targets your CORE while improving your cycling skills and technique. Join Coach Troy and a group of enthusiastic and fit athletes for this incredibly effective workout designed to increase your leg speed and cycling efficiency on the bike while simultaneously improving your core strength and stability for better performance. You'll be coached through a series of high cadence and one-leg pedaling drills for maximum efficiency and then through a bout of floor work, targeting your abs, obliques and lower back for greater core strength. An area often neglected by competitive cyclists and triathletes, this core-strengthening workout is a must have for any serious athlete or fitness enthusiast! This workout contains about 60% of Cycling Focus and 40% of Core Training Focus. Accessories used in this workout include: Physio Ball and Workout Mat Compatible with stationary bikes and all stationary trainers
  • Has a 'music on/music off' option allowing you to listen to your own music
  • DVD only
  • Length: 60 Minutes
  • Difficulty level: 9.0
Spinervals Virtual Reality 4.0 Madison Training Ride DVD
$23.99 $29.95 20% Off
Check out our newest addition to the 'ON THE ROAD' series, Madison Wisconsin Training Ride! This approximately 3-hour virtual workout DVD covers much of the Iron distance triathlon race course in Madison, offering a great perspective of the race from the bike as well as a great aerobic endurance building workout for any cyclist. Join Coach Troy and top age group athletes from Team Gear West as they ride with you through the corn fields of the upper mid-west. Learn from the coach as he instructs you on various technique and strategy issues for faster riding and racing. Difficulty Level: 9.3
Saris Aluminum Roller
$299.99
Take on any race, club ride, or weekend adventure with confidence. When you add Saris rollers into your training routine, you'll increase your balance, control, and ability to ride a straight line — all of which translate to more efficiency, power, and technique on the road. And, because you have to pedal 100% of the time to balance your bike, you get an amazing workout, no matter your pace. - Improve balance, control, and ability to ride a straight line. - Aluminum roller drums run silently and smoothly. - Precision-lathed 3.25" aluminum roller drums won't distort in heat or sunlight. - Fold flat or stand on end for convenient storage. - Designed for both indoor and outdoor use - 16" wide wheel base fits just about any size of bike and allows plenty of room to move around. - Rubber foot pads ensure that the only thing moving on the rollers are the drums, providing a secure, sturdy ride. - Durable steel-frame construction - Adjustable belt for right and left dismount - Resistance Roller uses zero moving parts to deliver quiet magnetic resistance. - Maximum wheelbase 44.5" (axle to axle) - Minimum wheelbase 37.5" (axle to axle)
Saris Fluid
$249.99
JFK once said, “Nothing compares to the pleasure of riding a bike.” Here at Saris, we couldn’t agree more. That’s why we’re committed to helping bicyclists of all types get on their bikes and ride. The Fluid bike trainer can help you do just that, no matter the season, schedule or time of day. Its fluid progressive resistance matches your effort without hardly making a sound, no adjustments needed. Plus, the Fluid comes with a durable, foldable, and easy-to-store trainer frame. - Fluid resistance unit provides a quiet and consistent ride. - Progressive resistance offers the widest resistance range and road-like feel. - Comes on an easy-to-store, foldable bike trainer frame - Compatible with Zwift and other indoor training apps
Saris Fluid Smart Equipped
$299.99
The easiest, most affordable way to access to virtual training communities such as Rouvy and Zwift is with a basic bike trainer and a speed sensor. Enter: the Fluid Smart Equipped. Our sturdy trainer frame features a reliable and quiet fluid resistance unit and comes with a speed sensor that can be used for any virtual – or non-virtual – training ride. Simply install the magnetless speed sensor on the rear wheel of your bike, mount your bike to the Fluid bike trainer, connect to your virtual training application of choice via Bluetooth or ANT+, and ta da! – you’re ready to ride. In the box: - Fluid Smart Equipped Bike Trainer - Dual-band magnetless speed sensor Details: - Fluid resistance unit provides a quiet and consistent ride. - Progressive resistance offers the widest resistance range and road-like feel. - Foldable bike trainer frame - Included speed sensor connects you with Rouvy, Zwift, and other virtual training apps. - ANT+ USB and BlueGiga USB sold separately. - Eccentric leveling feet allow for easy adjustment on uneven surfaces. - Adjust tire fit to resistance unit with a convenient turn knob. - Resistance unit roller allows for 700c, 26", 27", and 29" wheel sizes – up to a 2.0-inch tire. - This trainer is designed to fit common road and mountain bike frames with included steel quick release skewer and is compatible with rear dropout spacing: 120mm, 130mm, and 135mm - Trainer tire recommended - Compatible with virtual training apps - All of our trainers are tested to the combined weight (rider and bike) of 300 lbs. - Optional thru-axle adapter available for 142x12mm and 148x12mm bikes (sold separately) - Trainer skewer included - Noise level at 20 mph is 68-72 decibels.
Saris Fluid2 Smart Equipped
$349.99
What happens when you pair a speed sensor with the #1 selling bike trainer in the USA? You get a combo that’s ready for any virtual—or non-virtual—training ride. It’s the ideal setup for budget-conscious athletes looking to join fun, virtual communities, like Rouvy and Zwift, without a traditional smart trainer. Simply install the magnetless speed sensor on the rear wheel of your bike, mount your bike to the solid Fluid2 trainer with our innovative club knob, connect to your virtual training app of choice via Bluetooth or ANT+, and voilà! - you’re ready to sweat. In the box: - Fluid2 Smart Equipped Bike Trainer - PowerTap dual-band magnetless speed sensor - Front wheel leveling block Details: - PowerTuned for optimal road-like feel - Noise level at 20 mph is super-quiet 64-68 decibels. - Large, individually precision-balanced flywheel allows for improved, road-like feel. - Self-cooling mechanisms including a patented fan design keeps the unit performing better, longer. - Eccentric leveling feet allow for easy adjustment on uneven surfaces. - Comes on the Saris foldable Classic frame with spring loaded, bolt-action lever. - Precision-machined alloy roller reduces tire wear and slippage. - Features clutch knob for perfect roller-to-tire tension each ride. - 2" resistance unit roller allows for 650b, 700c, 26", 27", and 29" wheel sizes—up to a 2.0-inch tire. - This trainer is designed to fit common road and mountain bike frames with included steel quick release skewer and has three settings for rear dropout spacing: 120mm, 130mm, and 135mm. - Trainer tire recommended - Compatible with virtual training apps - All of our trainers are tested to the combined weight (rider and bike) of 300 lbs. - Optional thru-axle adapter available for 142x12mm and 148x12mm bikes
Saris Fluid2 
$299.99
Better health. Faster splits. More me-time. Whatever your goals may be, the Fluid2 helps you get the most out of each indoor training ride. The large, precision-balanced flywheel (with patented fan design) lets you easily customize each ride simply by shifting gears, just as you would outside. This design also helps keep your Fluid2 working better – longer. And, thanks to our built-to-last manufacturing process, the Fluid2 can help you conquer one goal after the next. - Fluid resistance unit provides a quiet and consistent ride. - Progressive resistance offers the widest resistance range and road-like feel. - Best-selling trainer in the USA - Compatible with Zwift and other indoor cycling apps
Saris H3 Direct Drive Smart Trainer
$999.99
Reliable. Durable. Quieter Than Ever Before. When it comes to indoor bike trainers, the most frequently asked question is: how quiet is it? Taking this to heart, our Madison, Wisconsin-based team put this query under the microscope and set a goal to build a trainer so quiet, that the only sound is that of your drive train. The result? A direct drive smart trainer that touts a sound specification of 59 decibels at 20 mph. In other words, the H3 is five times quieter than previous generations, making it the quietest smart trainer to ever leave our doors. Following the Saris direct drive smart trainer legacy, the H3 features the same reliably and durability as its predecessors. Each H3 is made from cast and machined aluminum sourced from America’s heartland. Encased inside are components meticulously calibrated to measure power, speed and cadence, as well as a precision-balanced flywheel - all built to handle 2000 watts and replicate a 20% climbing grade. Tested to withstand heavy training, the H3’s internal cooling system will keep the electromagnetic resistance system working – and accurate – long after your legs have given out. - Quieter Than Ever: all new drive system shaves decibels off previous generations. - Precise Training: +/- 2% power accuracy. - Controlled and Consistent: electromagnetic resistance provides a measured workout every time. - Direct Drive Design: widest bike compatibility and eliminates wheel slips. - No External Sensors Required: measures speed, cadence and power. - Seamless Integration: connects to indoor cycling apps with dual ANT+ FE-C and Bluetooth FTMS standards. - Zwift certified. Specs - Noise level: 59 decibels at 20 mph - Power measurement accuracy: +/- 2% - Maximum power output: 2000 watts at 20 mph - Simulates a 20% climbing grade - Fast response electromagnetic resistance - Measures speed, cadence and power – no external sensors needed - 20 lb precision balanced flywheel - Integrated dual ANT+ FE-C and Bluetooth FTMS standards - Built-in front wheel block - Integrated carrying handle - Compatible with Shimano 8-11 speed cassettes - XD/XDR freehubs sold separately (link) - Thru-axle compatible for bike frames with fork widths of 142 or 148. - Quick-release compatible for bike frames with fork widths of 130mm and 135 mm. - Compatible with a wide variety of devices and indoor cycling applications, including Rouvy, Zwift, TrainerRoad and many more. Contact us with questions about compatibility with other software. - Headless mode (powered on, not paired to any apps) lets you ride with a progressive resistance curve that matches the Fluid2 (link). - LED indicator lights communicate connectivity and more. - Direct drive design directly connects the bicycle to the resistance unit, eliminating tire wear. - Internal cooling technology ensures accurate ride data even during the hardest of workouts. - Folding legs provide widest footprint of direct drive indoor bicycle trainers on the market for added stability and easy storage. - Accessible and balanced handle allows for smooth, anyone-can-carry transit of the trainer. - Over the air (OTA) firmware updates and calibration via the Saris app (link to firmware page) - Maximum weight (rider and bike): 300 lbs. - Dimensions when Open L*H*W: 31x18.5x19.5 inches (787.4x469.9x495.3 mm). - Dimensions when Closed L*H*W: 8.5x18.5x19.5 inches (76.2x469.9x495.3 mm). - Weight: 47 lb. (21.3 kg). - Cassette sold separately.
Saris M2 Smart Trainer
$499.99
Whether you want to attend a group ride in Zwift, climb the Dolomites in Rouvy, or simply need a sweat session, the M2 smart trainer can get you there. All you need is your bike, the M2, your favorite virtual training software, and device of choice. This do-it-all, smart bike trainer is capable of replicating any workout thrown its way, up to 1500 watts and a 15% climbing grade. Simply connect to your virtual training application of choice via integrated dual-band ANT+ FE-C and Bluetooth, and let the M2’s electromagnetic response system do the rest. And, thanks to integrated speed, cadence, and power data, you can track and record performance data without extra external sensors. Plus, our innovative clutch knob ensures perfect tire-to roller connection for every single ride. - Noise level is a quiet 69 decibels at 20 mph. - PowerTuned using PowerTap technology for accurate power readings up to +/- 5%. - This trainer is designed to fit common road and mountain bike frames with included steel quick release skewer and has three settings for rear dropout spacing: 120mm, 130mm, and 135mm. - Optional thru-axle adapter available for 142x12mm and 148x12mm. - Integrated dual ANT+ FE-C and Bluetooth standards. - Fast response electromagnetic resistance ensures most responsive resistance and maximum power available. - Robust design is capable of handling up to 1500 watts at 20 mph and can simulate up to a 15% climbing grade. - Headless mode (powered on, not paired to any apps) lets you ride with a progressive resistance curve that matches the Fluid2. - Internally integrated speed, cadence, and power data eliminates the need for extra external sensors. - LED indicator lights communicate connectivity and more. - Internal cooling system moves air through the trainer to keep it cool while active thermal sensors ensure accurate performance data even during the hardest of workouts. - Comes on the Saris foldable Classic frame with spring loaded, bolt-action lever. - Features clutch knob for perfect roller to tire tension each ride. - 2" resistance unit roller allows for 650b, 700c, 26", 27", and 29" - up to a 2.0-inch tire. - Does not fit 650c wheel sizes, nor all 29er tires. - Precision-machined alloy roller reduces tire wear and slippage. - Eccentric leveling feet allow for easy adjustment on uneven surfaces. - Trainer tire recommended - Compatible with a wide variety of devices and virtual training applications, including Rouvy, Zwift, TrainerRoad, and many more. Contact us with questions about compatibility with other software. - Over the air (OTA) firmware updates via Bluetooth devices ensures the M2 is up to date. - Some assembly required - All of our trainers are tested to the combined weight (rider and bike) of 300 lbs. - ANT+ and BlueGiga USB dongles sold separately - Not compatible with CycleOps- or Saris-branded 20/24" wheel adapter
Saris Mag
$189.99
No fancy gizmos. No wires. No fuss. If you’re looking for an easy way to ride your bicycle indoors, call off the search – you’ve found it. Whether your training for a local charity ride or working to beat your friend’s FitBit score, the Mag indoor bike trainer can help you make it happen. Simply connect the trainer to the rear wheel of your bike, hop on, and pedal away. Plus, the Mag comes with five adjustable levels of resistance so you can adapt every ride to your liking. - Magnetic resistance unit provides a quiet and frictionless ride. - Linear resistance boosts workout intensity to match each pedal stroke and gear click. - Features five adjustable levels of resistance - Compatible with Zwift and other indoor training apps
Saris Mag Smart Equipped
$239.99
Designed to get you “out” for a ride for those times you simply can’t get out. Whether you’re craving a technology-free trainer session or a ride with your virtual crew, the Mag Smart Equipped can help you tally the miles. Our easy-to-store, foldable trainer frame features an adjustable linear resistance unit with five levels and comes with a speed sensor that can be used for any virtual – or non-virtual – training ride. For use with your favorite indoor cycling app, install the speed sensor on the rear wheel of your bike, mount your bike to the Mag bike trainer, connect via Bluetooth or ANT+, and prepare to sweat. - Magnetic resistance unit provides a quiet and frictionless ride. - Linear resistance boosts workout intensity to match each pedal stroke and gear click. - Included speed sensor connects you with indoor cycling apps
Saris Mag+
$229.99
Stick to your fitness plan year round with the help of the Saris Mag+ trainer. It is the perfect way to keep your legs warm when it's cold, dry when it's wet, and safe when it's too dark to ride outside. With this turbo trainer, it's easy to turn your bike into your go-to calorie burner — no matter the season. Simply attach the handlebar-mounted shifter to change resistance during your workout without having to leave your bike. Want to train with Zwift or Rouvy? All you need is a speed sensor. Visit our setup guide to learn how to get started. - Magnetic resistance unit provides a quiet and frictionless ride. - Linear resistance boosts workout intensity to match each pedal stroke and gear click. - Mag+ comes with convenient, adjustable handlebar-mounted shifter. - Compatible with Zwift and other indoor cycling apps
Saris Trainer Accessory Kit
$99.99
Everything you need for the best indoor trainer experience possible. - Can be used across a wide range of trainer setups. - Includes Trainer Mat, Climbing Block and Saris towel.
Saris Trainer Clutch Knob Upgrade/Replacement Kit
$29.99
- Includes clutch knob and L-bolt - Basic Trainer Clutch Knob is compatible with any Wind, Mag, Mag+, Magneto or Fluid trainer that already uses L-bolt - Magnus Clutch Knob should only be used with Magnus Smart Trainer - Watch our video to learn more
RUNeRVALS Runervals 3.0 - Cheetah Fast!
$24.95
Train with Coach Troy and several elite runners, including 2000 U.S. Olympic triathlete and Olympic marathon trials runner Joanna Zeiger. This 45 minute high intensity treadmill workout is designed to increase your strength and speed like no other. Add this workout to your training regimen, and a PR is in your future! This workout has been DIGITALLY REMASTERED. Length: 45 minutes Difficulty level: 9.
Problem Solvers Roller Belt for Minoura, Cycleops, & Various Manufacturers
$19.99
Clear polyurethane belt, 3/16" diameter. Fits roller between 70 and 83" in length.
Minoura LR240-Mini M20-V Bicycle Trainer
$251.99
The LR240 Indoor Bicycle Trainer features an advanced magturbo for a powerful and quiet experience. Can be used with 18-20 inch tires. - Single neodymium magnet with a quiet and smooth feel - Generates 433 watts of power at 25 mph - 7 resistance levels with a 35% wider resistance range than standard Mag Series - Quick release remote shifter; allows for high-speed/low resistance training - 24W X 12H X 11D (inches)
Minoura RDA-2429 D Bicycle Trainer
$271.99
The Minoura RDA-2429 D Bicycle Trainer features the world's only one-rim drive unit. Driven by a rubber roller contacting the rim's side wall, there will be no vibration with any tire tread, even knobby MTB tires. Complete with seven levels of resistance, it will fit any wheel size between 24 inch and 29 inch/700c. 35mm diameter legs provide stability while supporting weight. - World's only one-rim drive unit, driven by rubber roller contacting rim side wall - No vibration ride no matter the tire tread, even for knobby MTB tire - Seven levels of resistance - Fits any wheel size between 24 inch and 29 inch/700c; 35 mm diameter legs to provide stability while supporting weight - 25.6D X 20W X16H (inches)
Minoura RDA-2429 R Bicycle Trainer with Remote
$329.99
The RDA-2429 is the world only one rim drive unit and is on a lightweight but stable frame. Comes with a remote for easy adjustment. - World exclusive rim drive system for 24-29" bicycles - Mount up to a 29 x 2.55" tire - Special surface shape works with most disc brake rims - 7 adjustable resistance levels - H-shape durable steel framef
Minoura SmartTurbo Kagura LST9200 LiveRide Indoor Magnetic Bicycle Trainer
$649.99
Minoura, the company that invented the mag trainer, now brings you the SmartTurbo Kagura LS9200 trainer. This trainer operates in either a fixed or gravity mode, allowing the user to train more traditionally or by simulating a downhill ride. Using Bluetooth or ANT+, the trainer will connect to your smartphone, tablet, or laptop to transmit data, OR you can use apps (on ios, android, Windows and Mac!) from Zwift, Kinomap and more to create an amazing simulation of outdoor riding. It will also talk to select products from companies like Garmin to simulate a workout or course. This trainer is smooth and quiet, and can be used (with the Neodymium magnet) straight out of the box! This will allow the user to warm up before a race, for example, and then take it home and plug it back in for Smart training. It will accommodate 650b/700c/26"/27.5" tires, and includes a QR skewer for rear hub widths from 125-140mm.
Kreitler Alloy 2.25 Rollers
$488.99 $549.95 11% Off
Originally designed for the US Cycling Team (at their request), the Alloy Rollers features 2.25" diameter drums (15" wide) to provide the greatest resistance. The silver aluminum drum tubes have silver anodized end caps and the frame is black epoxy powder coated. Only the strongest riders could use the "Killer KOOL Headwind" here, it is not recommended with this size drum. The Standard Kreitler Frame is adjustable for wheelbases from 31.5” to 48.5”.
Kreitler Alloy 3.0 Rollers
$516.95 $549.95 6% Off
The Alloy 3.0 Rollers have approximately 40% more resistance compared to the 4.5 rollers, offering the best combination of resistance, cost, and portability.
  • 3.0” x 15” Alloy Drums with Alloy End Caps
  • Standard Kreitler Frame
  • Belt
  • The Standard Kreitler Frame is adjustable for wheelbases from 31.5” to 48.5”
Kreitler Alloy 4.5 Rollers
$549.95 $599.95 8% Off
The Alloy is the top-of-the-line when it comes to rollers. The all aluminum drum construction, aluminum end caps and shield bearings are perfect for high rpm continuous pedaling. The drums are 4.5" x 15" and perfect for use with the "Killer KOOL Headwind" and Flywheel. The Alloy has a black epoxy powder coated frame and an orange belt. The Standard Kreitler Frame is adjustable for wheelbases from 31.5” to 48.5”.
Kreitler Alloy 4.5 Rollers with Killer Kool Headwind Fan
$704.95 $774.95 9% Off
The Alloy is the top-of-the-line when it comes to rollers. The all aluminum drum construction, aluminum end caps and shield bearings are perfect for high rpm continuous pedaling. The drums are 4.5" x 15" and perfect for use with the "Killer KOOL Headwind" and Flywheel. The Alloy has a black epoxy powder coated frame and an orange belt. The Standard Kreitler Frame is adjustable for wheelbases from 31.5” to 48.5”. This set of rollers comes with the "Killer KOOL Headwind." The Killer Kool Headwind Fan is an adjustable resistance unit that runs off a belt coming from the front drum of your Kreitler Rollers. The Headwind Fan has several functions. The main function is to add resistance. An adjustable air inlet controls the amount of resistance desired. When closed, the additional resistance is minimal. Wide open, the resistance is high enough for even the strongest riders. The second function is to provide a cooling breeze. The Fan unit can be rotated to point the airflow high or low, and adjustable louvers can fine tune the side-to-side direction. Staying cool will make your workouts more enjoyable and is less stress on your body. The Fan attaches to the front left side of the Frame. You can also direct the airflow away from you if desired.
Kreitler Challenger 4.5 Rollers
$422.99 $449.95 6% Off
The Challenger features 4.5" diameter by 15" wide aluminum drum tubes with black polycarbonate end caps, for the cost conscious riders who value the ride of the larger drums. A black epoxy powder coated frame and orange belt round out the Challenger. Like all Kreitler roller sets, the Challenger also works with the "Killer KOOL Headwind" and Flywheel. The Standard Kreitler Frame is adjustable for wheelbases from 31.5” to 48.5”.
Kreitler Challenger 4.5 Rollers with Headwind Fan
$599.95 $654.95 8% Off
The Challenger features 4.5" diameter by 15" wide aluminum drum tubes with black polycarbonate end caps, for the cost conscious riders who value the ride of the larger drums. A black epoxy powder coated frame and orange belt round out the Challenger. The Challenger also comes with the "Killer KOOL Headwind" fan. The Standard Kreitler Frame is adjustable for wheelbases from 31.5” to 48.5”.