ANTONISH wrote:I've also had the odd problem with chain suck (not this bike) and I wonder if it's worse with a short wheelbase.
It is worse with small chainrings; the reason is twofold, I think;
1) the chain tension is higher for any given pedal pressure (causing more rapid hooking wear) and
2) the chain wrap on the chainring is shorter.
On the latter point with a 26T chainring there are only ~13 links in mesh with the chain (less than that with a long arm mech) and the chances of a slightly hooked chainring 'hanging on' to the chain are substantially increased. By contrast I have never heard of chainsuck being caused by a hooked chainring of reasonably large size.