The TRANSALP is specifically designed for bikes with disc brakes. Simple and super quick to mount to 26″ and 700c bikes. Produced from lightweight 10mm alloy tubing and with additional lower pannier mounting rails means its easy to attach a rack pack without interfering with pannier hooks. Max load 25kg. Specification & Features of Tortec Transalp Rear Disc Rack. specifically designed for bikes with disc brakes. Simple and super quick to mount to 26″ and 700c bikes. Produced from lightweight 10mm alloy tubing and with additional lower pannier mounting rails means its easy to attach a rack pack without interfering with pannier hooks. Max load 25kg. Tortec Transalp Rear Disc Rack is perfect for:. Bikes with disc brakes.