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6" Negative Spring Air Offset 39 Positive Spring Air S
The slot allows you to true the rotor
Attaches to saddle rails or frame/fork via Velcro straps
Brake Type None Color Black Defined Color Black Front Axle Type 3/8" Material Chromoly Steel Offset (mm) 15 Steer Tube Diameter 1-1/8" Steerer Tube Material Steel Wheel Size 20"
Pirelli Cinturato SmarTube X Tube - 700 x 28 - 40mm 60mm Presta Valve Model=105 ST-R7170 Di2 Shift/Brake Lever with BR-R7170 Disc Brake Caliper 6" Negative Spring Air Offset70% weight savings compared to conventional tubes 50% smaller than conventional tubes 3x thicker than standard SmarTUBES Not for use with rim brakes Not designed to be repaired Constructed of Thermoplastic Polyurethane Weighs just 150 grams TECH SPECS Tube Width 28 40C Tube Weight 145g Valve Length 42mm Valve Presta Wheel Diameter 700C Shaft Type Non threaded
