|   how to measure chainring size | MIchael Hazelwood
Oct 16, 2001 4:42 AM | | |
| Measure the diameter of the circle formed by... | Metroid
Oct 16, 2001 5:35 AM | | the center of the chainring bolt holes, i.e. Bolt Circle Diameter (BCD). There is also a nifty chart in the Nashbar catalog. Or you can figure it out by what size cranks you have...
5-Bolt
Compact 94mm/58mm
Standard 110mm/74mm
4-Bolt
Compact 104mm/58mm
Standard (XTR) 112mm/68mm
Most cranks are compact with chainrings typically sized 22T/32T/44T. Standard cranks have larger chainrings like 24T/34T/46T or larger. |
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