Finally: a mechanical disc brake for mountain bikes and fat bikes that offers superior performance and is a snap to set up. The Spyke is a dual-sided mechanical caliper where both pads actuate to provide even and precise clamping force. This results in even pad wear and easy pad adjustment with the addition of a barrel adjuster. No longer is adjusting the whole caliper necessary as the pads wear. All of this in a 169g (per caliper) package that works with all linear-pull levers. Caliper and mounting bolts included. SPECIFICATIONS - Dual-piston actuation - Even pad wear - Easy adjustment and set up - Works with ALL long-pull levers - TRP's own, ultra-grippy, semi-metallic pad that is Shimano M525/M515 compatible, allowing for further customization - Compound works well in dry conditions but may wear quickly in wet/muddy conditions - Rotor and adapters sold separately - Weight: 170g/caliper per wheel