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Crankset Standards
Finding the correct bottom bracket for your frame can be challenging. First identify your frame's Bottom Bracket Standard. Then use the chart below to help identify key crankset dimensions needed to select the correct bottom bracket for your frame. Scroll to bottom of page for photos of each crank type.
|
Crankset |
Spindle Diameter |
Bearings |
Notes |
| Shimano HollowTech II |
|
|
Current Shimnao crank specification. Spindle length varies depending on type of crank (road, Mountain, Triple, etc.). Two-piece system. Crank spindle is pressed into the drive side crank arm. |
| GXP |
|
|
SRAM / Truvative crank system. Spindle diameter is 24mm on the drive side, and 22mm on the non-drive side where the splines are. The crank slides completely through a 24x37 drive side bearing and stops against a 22x37 non drive side bearing. Two-piece system. Crank spindle is pressed into the drive side crank arm. Uses wave washer on drive side of crankset to take up any play in crank. |
| SRAM DUB |
|
|
SRAM introduced the DUB cranks in 2018. 29mm diameter spindles. Meant to be used across all BB standards. |
| BB30 |
|
|
30mm spindle diameter cranks. Used in both BB30 and PF30 bottom bracket shells. |
| PF30 |
|
|
30mm spindle diameter cranks. Used in both BB30 and PF30 bottom bracket shells. |
| Rotor 3D |
|
|
Splined interface much like Shimano HollowTech II. |
| Rotor 3D24 |
|
|
Splined interface much like Shimano HollowTech II. |
| Rotor 3D30 |
|
|
|
| Rotor 3D+ |
|
|
|
| Rotor 3DF |
|
|
|
| RaceFace EXI |
|
|
Splined interface much like Shimano HollowTech II. |
| RaceFace Cinch / SL |
|
|
RaceFace Cinch is a three-piece system. Different length spindles can be used depending on the frame/bottom bracket configuration |
| Specialized S-Works FACT |
|
|
|
| Cannondale Hollowgram SL / SI / SISL2 |
|
|
Cannondale crank for use in BB30A or PF30A frames. 3-piece crankset with separate, replaceable spindle. Can be used in BB30, PF30, BBRight, 386EVO frames with the appropriate length spindle. |
| FSA BB386EVO |
|
|
Designed to work in frames shell width from 68mm to 86.5mm. |
| FSA BB392EVO |
|
|
Designed to work in frames shell width from 68mm to 92mm. |
| FSA MegaEXO |
|
|
Splined interface much like Shimano HollowTech II. NOTE: FSA MegaEXO crank spindle diameters can be as large as 24.07mm. These cranks will not work in normal 24x37 bearings. Please see our 24.07 x 37 bearing for use with these cranks. |
| Praxis M30 THRU BB |
|
|
Crank spindle diameter is 30mm from end to end. |
| Praxis M30 BB |
|
|
Crank spindles are 30mm and then have a step-down to 28mm to lock on the non-drive side bearing. |
| Cane Creek eeWings |
|
|
Road version designed to work in frames shell width from 68mm to 86.5mm. Mountain version designed to work in frames shell width from 73mm to 92mm. |
| Campagnolo Ultra Torque |
|
|
2-piece crankset using a hirth joint in the middle of the spindle. Bearings are pressed onto the spindle next to each crank arm instead of pressed into the bottom bracket cups. |
| Campagnolo Power Torque |
|
|
Spindle is permanently attached to the drive-side crank arm. Drive side bearing is pressed on the spindle up against the crank arm. Non-drive side bearing is pressed into the non-drive side bottom bracket cup. |
| Campagnolo Over Torque |
|
|
Similar to other 30mm spindle cranks. Bearings are pressed into the bottom bracket cups. |
24mm Spindle Crank (Shimano HollowTech II, etc.)
22mm/24mm Spindle Cranks (SRAM / Truvativ GXP)
29mm Spindle Cranks
30mm Spindle Cranks
Spindle Lengths
When measuring your spindle length for use with Wheels Mfg bottom brackets, measure overall spindle length from the inner face of one crank arm to the end of the spindle. Remove all crank spacers and wave washer if present. If crank has a pre-load adjuster, measure from the face of the adjuster to the end of the spindle.
24mm Spindle Length
22mm/24mm Spindle Length
29mm & 30mm Spindle Length
Most adjusters found on 29mm & 30mm dia spindles can be removed to gain additional overall spindle length. In some applications it may be necessary to remove the adjuster.
Bearing Landing
When determining whether a crank will work with a particular bottom bracket, it is also important to check the bearing landing surface on the crank spindle. Most crank spindles are machined so that bearing landings (22mm, 24mm, 29mm or 30mm diameter) are wide enough and spaced far enough apart to work within a limited range of bottom bracket widths. When attempting to use a much wider crank spindle than your bottom bracket width, make sure that the bottom bracket bearings fall within the bearing landings on your crank.
Crankset
Shimano HollowTech II
Spindle Diameter
24mm
Bearings
24x37 (Drive)
22x37 (Non-Drive)
Notes
Current Shimnao crank specification. Spindle length varies depending on type of crank (road, Mountain, Triple, etc.). Two-piece system. Crank spindle is pressed into the drive side crank arm.