On my Santa Cruz Superlight. I get this loud "crack" sound when I get on the bike. Its a single cack which is never repeated during a ride. Only when I first get on and stand on the pedals. Before I leave the house I push the fork down and the rear end to check that I have air in the shocks, no sound. The bb is a ES-70 xt/lx splined unit which feels smooth when its in my hands and in the frame. There is no play in the thing. The hubs are Hugi 240 disc and feel fine, smooth and no play. The freewheel mechanism looks good and is well lubricated with slick honey. New XT cassette and SRAM PC-59 chain and ENVY rings tourqued to spec. New Fox Talas Fork. The Thomson layback post has been disassembled and cleaned. All fasteners on the bike are lubed with anti seize. 959 pedals seem good and grease was recently changed. King headset just sits there and works and works and works without apparent complaint. The swingarm is out by a bit, maybe 3 or 4 mm at the seat tube but the bike rides dead straight. The shop is aware of the swingarm issue and told me to ride it and if I get any problem it will be dealt with. I have an very good relationship with the shop. I have run out of ideas. I am somewhat suspicious of that swingarm. But if that was off too much why doesn't the sound repeat during a ride? The bushing is not wearing out at a mad rate. I've had a Heckler before this bike which had the same geometry but heavier tubes. The bushings on that bike wore at a similar rate. I found the rear shock bushing became loose about every 4 to 6 months. What else can I check?
perplexed in North Vancouver.
perplexed in North Vancouver.
