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@Linc
The seatpost bolt on my Isaac carbon seatpost has broken off inside the top clamp. I thought the easiest fix was to drill out the bolt and get a new bolt, but used an old shoddy drill bit and managed to break the drill bit off inside the top clamp! So i'm now after a new bolt and top clamp. I've tried 5 bike shops so far and they all say they can't replace the clamp, they can only sell a new seatpost. Seems like a total waste to get a new seatpost when all i need is the clamp. The clamp looks almost identical to the clamo on my Condor seatpost so that is my next point of call. Does anyone have any other bright ideas if that fails?