NEW BOX Three Prime 9 9-Speed Cassette eBike 12-50t, variant-size-43-eu-mens Nylon breaker in the sidewalls

Nylon breaker in the sidewalls for cut protection

Works with tires up to 3

SLX BR-M665/601

Safety release tabs keep wheels turning even if debris gets between the fender and tire

NEW BOX Three Prime 9 9-Speed Cassette eBike 12-50t, variant-size-43-eu-mens Nylon breaker in the sidewallsThe Box Three Prime 9 cassette is a great all around cassette option. All cogs are stamped from steel and subsequently, the larger ones are pinned to alloy spiders. It also features weight reducing holes on the cogs. The Box Three Prime 9 offers ultra wide ratio with consistent progressions Prime 9 technology offers the same range as a 12 speed drivetrain, with fewer gears to shift through Fewer parts, reduced weight, and increased durability Cogs