I’m actually quite pleased with my guess of what had happened of ‘the spindle has spiral-cracked’. Turns out that’s exactly what happened!
The pics don’t really do it justice as the crack runs in a nice spiral from one set of splines to the other. It has borked the BB as well because the only thing stopping the coil coming totally unwound was the bb sleeve and bearing cover, so the cover pushed out on the spindle when I took it out. It then split when I tried to get it off of the spindle.
Thinking about it, this could have been far, far worse. If the crack had run all the way to the end of the spindles the crank arm would have come away far more – if real effort had been going through the pedals at that point I think there would have been quite a lot of pain involved. 😳
Still, that part of the bike is all stripped down, threads cleaned, ready for a new BB and crankset. Cost £130 from Wiggle for a Zee crankset, new BB, new pedals (fancied an upgrade) and new chain (needed one anyway) – so not as bad as I first thought. 😕
I’ve been impetuous and selected priority delivery, so should be ready to sort either tonight or tomorrow, so Saturday ride should not be affected.
See you next week – Woodhouse Eaves Village Car Park 7pm Wednesday 20th August – ready to ride (or at least ride for ten minutes before having to walk back to the car).
P.S. it was all the more galling because I felt like I was flying along, what with having a fork that actually works etc.