the exposed QuickTrack® system is compatible with all Topeak MTX TrunkBags and MTX Rear Baskets

It now lasts much longer before developing unsightly cracks when subjected to use with too low air pressure

To strengthen the front wheel and allow it to accommodate disc brakes

better traction

TRP Spyre Mechanical Disc Brake - Post Mount - No Rotor or Adaptors featured the exposed QuickTrack® system isSpyre brake calipers utilize two piston movement for evenly applied rotor contact, resulting in optimum braking power and modulation. Ramped ball bearings offer smooth pad engagement and precise modulation Brake pad composite is Resin with Metal Fibers Resin with Metal Fibers pads are compatible with Resin Only type rotors as well as standard rotors Intended for Road, Gravel and CX use Mounting hardware, rotors and adaptors sold separately Post Mount