Surly Track Cog 1/8'' X 19t Silver MFPN=8030819354430 Durable 60 TPI casing and

Durable 60 TPI casing and new R:Shield breaker belt for increased protection

Durability was crucial

Body mapped mesh for optimal temperature regulation

}WTB Trail Boss Tire - 29 x 2

Flat Protection TreadTPI 60Color BrownWeight 680Defined Color BrownISO Width (mm) 55ISO Diameter 622 / Road / 29"Tire Intended Use MountainTire Diameter 29"Tire Bead FoldingLabeled Size 29 x 2

Surly Track Cog 1/8'' X 19t Silver MFPN=8030819354430 Durable 60 TPI casing andSurly track cogs are threaded the same as a BMX freewheel (1. 375 x 24 tpi right hand threads). This means that they will fit on single speed rear hubs as well as BMX freewheel hubs but this application is not recommended. Track cogs are meant to work on track hubs only. 415 hardened chromoly steel 1. 375" x 24 tpi Photo for color and material reference only Tooth Count 19 Size 1 8''