I've had the above bike on loan for three weeks now. It had done around 500 miles on it when I got it. This morning on my way into work the rear wheel gear hub has started slipping when i select either 2nd or 3rd on the left hand thumb shifter. There's a horrible clucking noise and the pedals spin fast for maybe third of a turn before the drive through the chain is reengaged and it feels ok again for maybe a turn or so and then it does it again. From what I can see while riding the chain is definitely not moving between sprockets on the rear cassette so it must be the hub gear itself. Its a DD3 SRAM cassette. Has any body heard of these failing like this before.
Thanks
Thanks