Seatpost not in production - need ideas!

[montage]

Ok my project needs a 24mm seatpost....I can't get one of these long enough

Would like it to be 350mm long at least. I have heard of an adjustable seatpost but can't find this online....also is it possible to shim a 23.6 seatpost up to 24mm? If so what could I use to shim it?

As soon as this is sorted along with tyres then my project bike will be on the road

 

[TheDoctor]

I'd have thought shimming should be possible.
Thin aluminium should do the trick - do you have an empty beer can?
Or a full one and ten minutes to spare?

Failing that - Wiggle (amongst others) do seat post shims. You won't find one the right size, but if you get one meant for, say, a 26.8 post into a 27.2 frame, that would be something to start from. Then cut bits out to widen the slot till it fits in the frame. May well do the trick.

 

[HLaB]

+1 on the coke/ beer can. My old bike was also non standard, can remember the exact size but the difference between a standard size and the seat tube was small, too small for a standard shim but and the can filled the tiny gap.

 

[Gerry Attrick]

You could try an engineers' merchant for a sheet of shim steel. You will need a piece 0.2mm thick. The only snag is that you may have to buy far more than you need. I know that Cromwell Tools used to supply small quantities so you try Googling them.

I've checked my stock, but I only have imperial thicknesses, the nearest equivalent to 0.2mm being .008" which may or may not do the job. PM me if you are stuck.

 

[gbb]

I've got a tin of various thickness shims Montage...PM me if you want, i'll send a small assortment in the post.

Ps, theyre about 50mm wide, 100mm long brass material. Cuts easily with good scissors.

 

[montage]

Thanks for the offers guys - I will look into shimming a smaller seatpost - I'll wait until I get the seatpost first.

If a beer can doesn't do the job then I may well call on the help offered (a beer can as a shim will still be safe right?)

 

[TheDoctor]

Yes, beer cans make good shims.

 

[Landslide]

Make sure it's a good quality beer though. It may be worth getting a selection. You wouldn't want to be riding on a sub-standard shim now would you?

 

[HLaB]

Make sure it's a good quality beer though. It may be worth getting a selection. You wouldn't want to be riding on a sub-standard shim now would you?

yeah, I've heard the Guiness ones are better than Tennents, maybe you get a few different ones to try it out

 

[TheDoctor]

Make sure it's a good quality beer though. It may be worth getting a selection. You wouldn't want to be riding on a sub-standard shim now would you?

Landslide speaketh the sense. Prepare a selection of shim material, just in cases.
About 4 cases should do.