Promax DC-300 Caliper OEM Black Tire Diameter-20 Clamp Diameter: Universal endless strap

Clamp Diameter: Universal endless strap type

*2-Step top caps do not include adjuster knob

Ring Position/Type Chain Retaining Single Ring Tooth Count 28 Round or Oval Round Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Offset 3 Chainline/Hub Compatibility 135/142 MTB Hubs Chainline/Hub Compatibility 170/177 Hubs Chainline/Hub Compatibility 190/197 Hubs Chainline/Hub Compatibility 150/157 DH Hubs Chainline/Hub Compatibility 157 Super Boost Hubs Chainline/Hub Compatibility 141/148 Boost Hubs Material Aluminum Defined Color Blue Direct Mount Type Direct Mount CINCH

} Lightweight casing provides a supple ride quality M:Wall protection helps prevent cuts and reduces the chance of getting pinch flats Tread pattern designed for fast racing on smooth gravel

Promax DC-300 Caliper OEM Black Tire Diameter-20 Clamp Diameter: Universal endless strapmechanical disc brake caliper for Postmount system OEM packing 140 mm, rear; 160 mm, front TECH SPECS