Box One 3/8" BMX Chain Tensioners - Pair - Black 4" The hubs are blue anodized

The hubs are blue anodized alloy high flange sealed bearing with Machined Jelly Bean cut-outs on the flanges and 3/8 axles front & rear

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

one-piece brake shoes developed by Promax specifically for the P-1 brakes

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

multi-panel stitched canvas top

Box One 3/8" BMX Chain Tensioners - Pair - Black 4" The hubs are blue anodizedBox 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