Box One 3/8" BMX Chain Tensioners - Pair - Black 4" Size: Large / X-Large (56-61

Size: Large / X-Large (56-61 cm)

The MCS Hot Stik seat post extender is an aircraft-grade aluminum post extender designed to extend the length of your current seatpost and seat

CNC machined AL6061 top cover is sealed to keep moisture and grit away from the bearings

It features forged and CNC machined steel cups with a star nut and alloy top cap

adds abrasion protection without sacrificing casing suppleness

Box One 3/8" BMX Chain Tensioners - Pair - Black 4" Size: Large / X-Large (56-61Box One Chain Tensioners are extruded then CNC machined from 7075 aluminum for an optimal balance of strength and weight. A minimalist design adds style while reducing their overall mass, including laser etched graphics with wheel position guides and two 10mm mounting holes with 15mm of adjustment to ensure perfect adjustability. Fits most frames every time you remove and replace your wheel. Axle: 3 8" (10mm) Material: Aluminum Hardware: Stainless