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Hi, have a brand new Giant Trance X, it’s only a few rides old and Iv noticed a bit of a knock/creak on the bike. It only happens when the seatpost is up I’m sat down and pedalling. It doesn’t happen when the seat it is down and I’m pedalling, nor does it do it if I have the seat up and I’m not pedalling.
So I’m 6ft 3 and just under 17stone so i am not light at all - I tried tightening the seat incase it was the rails, changed pedals and it has gone back to the shop and they are not able to make the noise happen, guessing they are a lot lighter than me. But they did change the bottom bracket made sure the axles were greased etc.
So one solution is to lose a load of weight and it won’t creak but I kind of want to know what could be the issue as I have rode loads of bikes at this weight and not had any issue.
Any ideas?