I recently started exploring putting larger 11-36t cassettes on road bikes, and I've also seen many youtube so called "hacks" to go beyond the specified range of a road bike.
What confuses me is this table here that shows the pitch of a cassette. It says that for 11s cassettes, mtb and road have different cog pitch. An MTB cassette wouldn't index right on a road bike then, right?
What about all these fancy 1x sram systems for road. They seem to use some of the same cassettes as they offer to mtb. A cassette series is called PG1130 that can go all the way from 25t to 36/42t. When does this cog pitch difference then take place and shoudn't the cassettes have different model numbers?
Cassette Sprocket Pitch Code Sprocket Thickness Spacer Thickness Stack Width
mm. mm. mm. mm.
Campagnolo 10-speed 4.15 C10 1.7 2.42 38.8
Shimano 10-speed 3.95 S10 1.6 2.35 37.2
SRAM 10-speed 3.95 S10 1.6 2.35 37.2
Campagnolo 11-speed 3.85 C11 1.6 2.25 40.1*
Shimano 11-speed 3.74 S11 1.6 2.14 39.0*
SRAM 11-speed 3.72 na na na na
Shimano 11-speed mtb 3.9 na na na na
SRAM 11-speed mtb 3.9 na na na na
I have a an old 10s sram red derailleur (max 28t). I recently obtained a "road link" and I'm interested in shelling out big cash for a sram XG1099 cassette 11-36t. Seems 10s doesn't have this difference in pitch. Can someone confirm?
My friend has a sram PG1130 11-36t cassette on his road bike with a shimano ultegra 6800 mid cage derailleur and it seems to work fine. Is this an erroneous pitch match or what?