Box Two Brake Post Extender Black


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  • Built with premium materials
  • 6061-T6 aluminum construction for durability
  • Lightweight just 32 grams



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The box two brake post Extenders are the perfect solution for those needing that extra bit of brake pad adjustment without switching frame sizes. NC-machined from 6061-t6 aluminum, box two Extenders easily mount to any frame's existing cantilever brake bosses and provide an additional 16 mm of brake arm positioning.

Product details
  • Product Dimensions: 6 x 3.8 x 0.8 inches ; 1.6 ounces
  • Shipping Weight: 1.6 ounces (View shipping rates and policies)
  • ASIN: B0781XX9Z9
  • Item model number: BX-BK17EXTEN-BK

These brackets are needed to switch wheel sizes and gear ratios.
NOTICE: you must use v brakes that clear the bracket such as Lite Pro brakes.

Can’t use with every brake system. Hard to switch around.

Very nice.

Does what they are supposed to.