- Jul 7, 2014
- Winnipeg MB CA
So, I put the fat bike away last April after washing the winter muck off, and it sat for a few months until I got it out about just over a week ago. To my dismay, the front derailleur (Shimano SLX) was frozen in place - that is, likely rusted. When I try to shift down to the lower chain ring, the derailleur stays in place. I'm afraid the pivot points are rusted. Dumb, and completely preventable - I should have lubed it before putting the bike away. Anyway, I started out by spraying a bunch of Boeshield onto the pivot points, which helped a bit, but not enough. I followed up with a bunch of Sea Foam spray, using the shift lever to pull the derailleur up to the high gear, returning the lever to low, and pushing the derailleur back to low. Did this a number of times which seemed to help a bit, but not enough for the spring to overcome the resistance of the rusty pivots. Finally I took the derailleur off and soaked it in MMO for about an hour. Reinstalled it, and continued to work it by hand. It seems to be moving better, but is still not returning to its default rest position. Any other ideas short of replacing the derailleur? Thanks!