Crank Fitment Calculator
Determine Cratus Mk2 spindle compatibility, spacer requirements, Q-factor, chainline and chainstrike clearance based on your crank, bottom bracket width and configuration.
Dimension measured from the outside of the drive side cup to the outside of the non-drive side cup when the bottom bracket is installed.
How to Use This Calculator
Select your discipline, crank model and crankarm length, then enter your installed BB width to view spindle compatibility, spacer requirements and chainstrike clearance.
Bottom Bracket Compatibility: This calculator assumes a DUB (28.99 mm spindle) bottom bracket. 30 mm bottom brackets require a suitable 30 mm-to-DUB adapter. 24 mm bottom bracket systems are not compatible with Cratus Mk2 crankarms.
| Spindle Option | Q-Factor (mm) | Chainline (mm) | Drive Side (DS) Spacers (mm) |
Non-Drive Side (NDS) Spacers (mm) |
Compatible |
|---|
“Asymmetric” means the required spacer stack is not equal between the drive side and non-drive side. This may still be mechanically compatible, but fitment should be checked carefully.
| Chainstrike Clearance (mm) |
Short Armed | Long Armed | ||
|---|---|---|---|---|
| Straight | +3mm | Straight | +3mm | |
Red (negative): Chain and crankarm interference will occur when using the smallest cassette sprocket. Yellow: Clearance is minimal and fitment should be checked carefully.