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Bottom Brackets

CeramicSpeed ITA Road Bottom Bracket - Italian Thread, 70mm, 24mm Spindle, Coated Races
The CeramicSpeed Italian bottom bracket offers bearings with extremely low friction, improved power transfer, and a service life that far exceeds traditional steel bearings.
Grade 3 Silicon Nitride balls
Coated races increase bearing service life by increasing hardness of race and reducing corrosion
Reinforced polyamide cage and non-contact seals
Hand built in Denmark
CeramicSpeed products with coated bearings include a 6-year warranty

The CeramicSpeed PF30 bottom bracket offers bearings with extremely low friction, improved power transfer, and a service life that far exceeds traditional steel bearings.
Designed for SRAM's DUB crank standard, built on a 28.99 spindle
A more contamination resistant BB design that uses an integrated dust cover with a snug and secure fit to fully protect the face of the bearing
Carries the load from crank to frame with unparalleled durability and efficiency
Grade 3 Silicon Nitride balls
Hardened races
Reinforced polyamide cage and non-contact seals

Shimano BB-UN300 Square Spindle Bottom Brackets
Fits JIS square-taper cranksets
Crankarm fixing bolts sold separately
Hollow spindle
Spindle Interface Type: Square Taper JIS
BB Shell Width (mm): 73
Bottom Bracket Shell I.D.: 1.37
Spindle Length: 122.5
BB/Frame Interface: English
Defined Color: Black

$7.19
- Fits 3-piece crank set
- Includes right and left cup, lockring and bearings
- English type
- Shell: 68/73mm
- Cup Material: Steel
- Weight: 123 grams

$9.99
- Thread: BC 1.37 x 24T
- Caged bearing 1/4" x 9
- Fits most square taper cotterless BB axles
- Spindle Type: SQR JIS
- Cup Material: Steel

$11.99
- One-piece bottom bracket cup set
- Bearings included
- Fits smaller american juvenile/youth sized BB
- Shell: 65mm
- Cup Material: Steel
- Weight: 173 grams

$12.99
- Fits 3-piece crank set
- Includes right and left cup, lockring and bearings
- English type
- Shell: 68/73mm
- Cup Material: Steel
- Weight: 123 grams

$13.99 - $23.99
- One-piece bottom bracket cup set
- Bearings included
- Shell: 68mm
- Spindle Type: OPC
- Cup Material: Steel
- Weight: 265 grams

$14.79 - $16.79
- Bottom bracket for one-piece crank
- Sealed mechanism
- 24 TPI
- Spindle Type: One piece
- Cup Material: Steel
- Weight: 310-315g
- Cup Type: Press Fit
- Cup OD/Bearing OD: 51mm

$15.99 - $19.99
$15.99 - $19.99
Up to 5% Off
- Simple and reliable square taper bottom bracket
- Replaces both BB-UN26 and BB-UN55
- Sealed cartridge bearings
- Cr-Mo axle
- For bicycles equipped with a chain case, select BB-UN300-K
- For E-type front derailleur compatibility, choose BB-UN300-E
- Fixing bolts not included; Shimano FC-E6000 bolts suggested

$15.99
- Simple and reliable square taper bottom bracket
- Replaces both BB-UN26 and BB-UN55
- Sealed cartridge bearings
- Cr-Mo axle
- For bicycles equipped with a chain case, select BB-UN300-K
- For E-type front derailleur compatibility, choose BB-UN300-E
- Fixing bolts not included; Shimano FC-E6000 bolts suggested

$18.00 - $28.00
FSA PowerPro JIS Cartridge Bottom Brackets.
- Includes bolts
- Spindle Interface Type: Square Taper JIS
- BB Shell Width (mm): 68
- BB/Frame Interface: English

$18.99 - $20.99
Shimano BB-ES300 Octalink V2 Bottom Brackets
- Fits Shimano Octalink V2 Spline Cranksets
- Crankarm fixing bolts not included

$19.99
High performing square bottom bracket interfaces with English frames.
- Fits square-taper spindle cranksets
- Alloy adjustable cups
- Includes 2 axle bolts

$19.99
- Simple and reliable square taper bottom bracket
- Replaces both BB-UN26 and BB-UN55
- Sealed cartridge bearings
- Cr-Mo axle
- For bicycles equipped with a chain case, select BB-UN300-K
- For E-type front derailleur compatibility, choose BB-UN300-E
- Fixing bolts not included; Shimano FC-E6000 bolts suggested

$19.99
Shimano BB-UN300 Square Spindle Bottom Brackets
Fits JIS square-taper cranksets
Crankarm fixing bolts sold separately
Hollow spindle

$19.99
- Simple and reliable square taper bottom bracket
- Replaces both BB-UN26 and BB-UN55
- Sealed cartridge bearings
- Cr-Mo axle
- For bicycles equipped with a chain case, select BB-UN300-K
- For E-type front derailleur compatibility, choose BB-UN300-E
- Fixing bolts not included; Shimano FC-E6000 bolts suggested

$19.99
- Simple and reliable square taper bottom bracket
- Replaces both BB-UN26 and BB-UN55
- Sealed cartridge bearings
- Cr-Mo axle
- For bicycles equipped with a chain case, select BB-UN300-K
- For E-type front derailleur compatibility, choose BB-UN300-E
- Fixing bolts not included; Shimano FC-E6000 bolts suggested

$19.99
- Deore-level BB92 press-fit Hollowtech II bottom bracket
- Compatible with all mountain Hollowtech II cranks

$20.99
Shimano BB-ES300 Octalink V2 Bottom Brackets
- Fits Shimano Octalink V2 Spline Cranksets
- Crankarm fixing bolts not included

$21.90
- High quality alloy cups compatible with IRD QB55 bottom brackets (sold separately)
- Choose Swiss, French, or Italian bottom bracket thread dimensions
- Left cup: right hand thread
- Right cup: left hand thread

$21.99 - $22.99
- Steel body
- Steel cups
- Chromoly spindle
- Sealed bearings
- Interface: English
- Square Taper JIS
- Weight: 305-320 grams

$24.99 - $27.00
$27.00
Up to 7% Off
Running a conventional threaded bottom bracket on your BB30 or PF30 frame doesn't have to be complicated. This press-fit adapter from FSA goes in snug and opens up a lot of crankset possibilities for your BB30/PF30 frame.
- Aluminum
- Allows conventional threaded bottom brackets to be installed in a BB30 or PF30 frame
- Install with headset press (not included) and green Loctite (included)
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