Description
Not sure about the Bolt Circle Diameter (BCD) on your crank? Here’s an easy way to check!
Standard Measurement Method
| Distance Between Adjacent Holes | Resulting BCD | Typical Application |
| 43.5 mm | 74 mm | Inner ring of road triple cranksets |
| 55.4 mm | 94 mm | Older MTB or compact touring |
| 64.7 mm | 110 mm | Road Compact, CX, or older BMX |
| 76.4 mm | 130 mm | Standard Road (Shimano/SRAM) |
| 79.5 mm | 135 mm | Standard Road (Campagnolo) |
| 84.6 mm | 144 mm | Track / Fixed Gear |







Reviews
There are no reviews yet.