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How do you make sure the can stays put when you slide the post in?
I have a 27.0 post kicking around and just taken delivery of a new frame that is 27.2. I'd like to use this post but concerned that when I try I'll just end up pushing the metal down into the frame
Dont' do it!
only worth doing on a knacked frame, not a new one
!
bend a lip out at the top.
"How do you make sure the can stays put when you slide the post in?"
real simple to sort out, grab some pliers and turn an edge on the top side of your shim
when you install the shim and seatpost, it cannot slide down into the seat tube as the edge will catch on the seatclamp
happy trails!
Why not stevie?
I just bent the top mm or so over the seat tube. Works perfectly.
Just leave a cm of can out of the seat tube
When you put the shim in the seat tube, tap a little over the top so it doesn't slip down.
The seat clamp will hold it in position.
I did it on an old Mongoose frame
Thought about the lip but then thought may cause probs fitting seat clamp
why not?
because you have a frame that is machined to a tolerance of 27.2. wedging something in there will ruin the fine machining that has been done. also, alloy is very fragile ime, and wedging things in there that don't need to be in there only runs the risk of wrecking the tolerances.
in the future, when you fit a 27.2 seatpost that don't fit, you'll remember me and how tight it used to be
You used to be very tight
I glued some on with araldite. The post was 26.8 and the frame was 27.2, fit really well
Pffft, I shimmed my worn out shock bushings with coke can#, seat post will be fine, just roll a lip has been said.
#I'm not advocating that this is a good thing....
Friends of mine tried literally for HOURS to get this (the rumoured coke can shim) to work last summer but sadly it didn't...! Lots of bashed and cut fingers and i'm amazed the seatpost wasn't more damaged to be honest!
I've a spare 27.2mm seat post doing nowt If you want it J?
Was gonna ask if it's pimp, but I know you 🙂
Shall message you in a bit, thanks
Steve-Austin - Memberwhy not?
because you have a frame that is machined to a tolerance of 27.2. wedging something in there will ruin the fine machining that has been done
😆 😆 😆
I'm with you in that I would rather have a nicely fitted seatpost in my frame, but from my experience, seat tube internal diameters are all over the shop.
In fact, most frames are disappointedly bodged together if you check them to any degree of accuracy.
I'd be getting some verniers out on the cut can if it were me. 0.1mm has me doubtful?
A 30.9-31.6mm shim looks thin enough
(bend a lip out at the top)this