A few months ago it was really snowy around here, so of course I had a lots of fun riding through/in the snow, etc. Once I was done I’d put my snow-covered unicycle in the garage, and the snow would then melt and dry off.
Unfortunately that caused parts of it to rust, most noticeably on the part of the seatpost that’s in the frame. While previously it was difficult (but possible) to adjust the seat height, now it’s pretty much impossible. I could completely take off the clamp hold it into place and continue to ride around normally. That seat post won’t budge one bit.
I’ve doused it inside and out with WD-40, I’ve tried pounding it out from beneath using another seatpost, I’ve tried smacking the seat around until I was afraid of breaking my seat, and then I smacked it some more. That sucker is stuck
So then, I have two questions:
Does anyone have a solution to unstick a rusted-into-place seat post? I’d like to let shorter people ride, but the seat seems to be permanently stuck at the height the I ride at (not bad for me, bad for others who would like to ride.
Any ideas on how to prevent rust in the future after riding in snow/rain?
From the sound of it, it’s so tight that clamping the post or frame in a vice isn’t going to help? You might be able to do something clever with heating it up, but I’d suggest take the clamp off and leave it off. Go for a long ride, do some trials etc. After a bit it’ll probably loosen up.
The easiest way to prevent bad rusting is to keep your unicycle somewhere nice and warm and dry when you’re not riding it, like inside in a cupboard. It might be worth washing it after riding in the snow, cos it’ll get salt on it.
There is one other technique I’ve used but it only works if the seat post is Aluminum and the frame is Steel, since the two materials have different coefficients of expansion, Al being about twice that of steel. It involves liquid nitrogen, so it’s really cool.
I’ve got the same problem, for the same reasons. I’ve tried everything I could think of or find on the web. Now I’ve given up and I ride it around with no bolt in the seatpost clamp. Luckily it’s adjusted right.
A friend of mine got one loose by soaking it in penetrating oil, then beating on the side of it with a rubber mallet. So I bought a rubber mallet, but no luck for me. I think the reason the rust has such a strong grip is that it was a 22.2 mm post jammed into a frame designed for a 22 mm post.
Something I read: As a last resort you can sacrifice the seatpost and save the frame: saw off most of the seat post, then very carefully hacksaw through it from the inside (the long way). Then supposedly you can grab it with pliers and sort of peel it loose from within.