Chainrings
- Thread starter Kntr
- Start date
This is what I found on RF site. I still dont understand the difference in the chainrings though.
What is the difference between Compact and Standard?
A: Standard and Compact refers to the bolt spacing of your cranks. Standard is a 110mm outer, 74mm inner bolt pattern. This spacing enables the rider to typically use larger chain-rings, ie; 26 tooth granny rings,36 tooth mid-rings and 46-48 tooth outer-rings. These gear sizes are usually found on downhill bikes or mountain bikes that spend respectable amounts of time on the road as well as off. Compact spacing, 94mm outer and 58mm inner, allows the rider to use smaller chain-rings. For example, 20-22 tooth granny rings, 30-34 tooth mid-rings and 42-44 outer rings. These gear ratios are more commonly found on cross-country and free-ride type bikes, allowing for lower speed torque and spinning.
What is the difference between Compact and Standard?
A: Standard and Compact refers to the bolt spacing of your cranks. Standard is a 110mm outer, 74mm inner bolt pattern. This spacing enables the rider to typically use larger chain-rings, ie; 26 tooth granny rings,36 tooth mid-rings and 46-48 tooth outer-rings. These gear sizes are usually found on downhill bikes or mountain bikes that spend respectable amounts of time on the road as well as off. Compact spacing, 94mm outer and 58mm inner, allows the rider to use smaller chain-rings. For example, 20-22 tooth granny rings, 30-34 tooth mid-rings and 42-44 outer rings. These gear ratios are more commonly found on cross-country and free-ride type bikes, allowing for lower speed torque and spinning.
All four arm cranks (mtb) are 104mm BCD. Compact (94) and standard (110) apply only to 5-arm cranksets.
Except for Shimanos little 4 arm curveball.
What compact refers to is purely the BCD, not tooth size. 110/74mm BCD is standard, 104/64BCD is 4-arm compact and 94/58 is compact as well (compact 5-arm).
Many rings sizes are available in any or all of these designations. Just order a tooth size for the BCD you have. If you have compact, you either have 4 arm or 5 arm...
They fit said crankarms.
