Surly Disc Trucker Frameset - 26" Steel Grandpa's Khakis 54cm MPFN-820-05-451-KIT The individual teeth are tall

The individual teeth are tall and direction specific to create positive chain roller engagement which is critical for chain retention over rough terrain

And because of this

Shimano/SRAM 11sp Road cassette compatible

8 Cable Routing External Material Carbon Width Measurement Center Width 420 Defined Color Black Clip-on Compatible Yes

Tooth Count 40 Ring Position/Type Chain Retaining Single Ring Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD 110 Color Black Defined Color Black Material Aluminum

Surly Disc Trucker Frameset - 26" Steel Grandpa's Khakis 54cm MPFN-820-05-451-KIT The individual teeth are tallA class leading touring bike the newly redesigned Disc Trucker provides versatility and dependability on the daily commute or trans continental excursion. Fork blade three pack mounts enable you to attach and haul even more stuff and the frame features a low bottom bracket and long chainstays for comfort and stability while loaded down. With increased stack height and improved stand over clearance plus ample space for larger tires and fenders its