Surly Singleator Single-Speed Chain Tensioner - Black CheckoutSpec= 1.5 Diameter One-piece caliper design for the

One-piece caliper design for the best stiffness to weight ratio that results in improved lever feel and increased power (NOTE: GR4's are not compatible with vented rotors)

Silicone waist gripper keeps your jersey in place

Big Bore Valves are engineered with precision and designed to deliver maximum air inflation simply and efficiently

Fully biodegradable

Surly Singleator Single-Speed Chain Tensioner - Black CheckoutSpec= 1.5 Diameter One-piece caliper design for theThe Surly 1x1 Singleator offers a reliable adjustable solution for tensioning chains on singlespeed drivetrains with vertical dropouts. Designed to mount directly to a standard derailleur hanger the Singleator features a triple sealed spring floating 11 tooth pulley and fully adjustable chain line. Its forged body and stainless steel pivot bushing ensure long term durability while chain guides and a wide cog capacity support consistent quiet