Yellow Saddle
Guru
- Location
- Loch side.
A Synapse could be carbon or alu. If it is carbon, the rear triangle cannot go out of alignment unless something is broken.@Yellow Saddle - This sounds like BS to me, Can you confirm?
If it is aluminium, it is possible. However, this is unlikely since the OP would have noticed that the wheel rubs on the frame. There is so little frame clearance on those bikes that a 1mm alignment shows up as a 5mm error at the outer edge of the wheel. There isn't 5mm space to play with.
What the OP should do is:
1) Have someone ride the bike towards him/her. Have a look at wheel alignment as the bike approaches. You have to do this several times to get the right moment where the two wheels should be in alignment. It is easy to spot a crab-walk bike, especially if you compare with another in this experiment where the bike rides towards you. Road worthy testing stations use the same technique to check motorbikes. It is accurate.
2) If still in doubt (but you shouldn't), you could raise the bike onto a bike stand and remove the rear wheel, mudguards etc. Then use a long piece of string and start lacing it all over the rear triangle. Go though the two dropouts, over the brake anchor, to the bb and back, etc etc. Essentially the string creates a set of straight lines against which the various frame members can be compared. The way to compare is to find a gap and check if it is the same left and right. It quickly shows up misalignment.