Si Drive Internal Drive Gear
gr0 ffh 480 - 600 No Rollers
gr1 ffh 601 - 1100 No Rollers
gr1a ffh 680 - 1180 1 Roller
gr2 ffh 1000 - 1460 1 Roller
gr3 ffh 1461 - 1920 1 Roller
gr4 ffh 1880 - 2380 2 Rollers
All 17mm Back Set
custom footer