Optis Tubeless Tire Insert - 27.5" x 28-40mm Insert w/ Standard Presta Valve MFPN=WST081 }All-City Space Horse Bike -

}All-City Space Horse Bike - 700c Steel Tiagra Royal Mint 55cm

Material CottonGender/Age UnisexColor Slate BlueSize LargeSleeve Style ShortDefined Color Blue

please follow manufacturers recommendation for your frame/forks

BR-R7170 flat mount caliper is compact and light

Model/Year SuperDlx Coil (A1-A2) 57

Optis Tubeless Tire Insert - 27.5" x 28-40mm Insert w/ Standard Presta Valve MFPN=WST081 }All-City Space Horse Bike -Optis Tubeless Tire Insert 27. 5" x 28 40mm Insert w Standard Presta Valve. OPTIS (Odyssey Pneumatic Tire Insert System) is a lightweight highly tunable high efficiency tubeless tire insert. Tire assemblies are one of the most important performance factors for any bike. They provide all the grip to the ground they serve as a critical first element of the bikes suspension and they provide essential support to the cornering forces that the bike