There are lots of heckler owners on here so I am hoping someone might have experience with a creaky one..
My mate has a heckler with a creak, only when pedalling, have changed pedals, looked at bb which spins freely, removed front mech (which reportedly flexes under pedalling) and tested an alternative rear wheel. If you bounce on the bike even at angles, then no creak, unless under power.
I’m running out of ideas. I did notice it has half drop outs for the rear wheel, and these look worn.
If anyone has any ideas I would appreciate it.