Surly Single Cassette Cog 3/32" Splined 13t MFPN=910-21-372 The Shimano 105 FD-R7100 series

The Shimano 105 FD-R7100 series of 12-speed front derailleurs feature light front shifting smooth and natural shift action and Shimano toggle link construction with an optimized cage design that is seamlessly compatible with disc brake road bikes

0mm rise 20mm width 820mm up/back sweep 5/8 deg material aluminum color black weight 310g

laminated beech and oak wood veneer and real Italian suede leather

all electrically cured to minimize rolling resistance

Surly Single Cassette Cog 3/32" Splined 13t MFPN=910-21-372 The Shimano 105 FD-R7100 seriesSurly Single Speed Cogs. Designed as a singlespeed cog but may also be stacked and used with 9 speed shifter. Multi gear use will result in slower less crisp shifting than cogs designed for multi gear systems Fit Shimano freehub splines SCM 415 hardened chromoly steel Photo for color and material reference only Tooth Count 13 Cassette Body Type Shimano HG 7 Speed Drivetrain Speeds Single Speed 3 32" Material Steel