Cube attain gtc pro disc road bikecubes attain gtc pro disc is a functional masterpiece this high performance race bike combines the comfort and performance of a high tech carbon frame with the latest brake technology genuine long distance ability superb efficiency and unbelievable comfort are all in the attain gtc pro discs genes frameoptimising a frame for disc brakes is both art and science and as part of the process cube chose an x12 axle system both front and rear to improve rigid