26.8mm post in a 27...
 

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[Closed] 26.8mm post in a 27.2mm frame - bad idea?

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Well after a LOT of deliberation I just went and ordered myself a 456SS in that nice bright orange to try out the whole slack hardtail thing 😀

Anyway it has a 27.2mm seat post size. Can I safely use a 26.8mm post in it or will the .4mm make enough of a difference to cause slippage or damage to the frame?

Similarly will it be ok with a 30mm seat clamp where it should be using a 29.8mm?


 
Posted : 05/10/2010 8:27 pm
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Snappity-snap-snap


 
Posted : 05/10/2010 8:28 pm
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It'll be fine. It's all a con those different sizes.


 
Posted : 05/10/2010 8:29 pm
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I glued a piece of beer can on to my 26.8 post with araldite and it's a very good fit. If you wanna raise and lower the post a lot it might be a bad idea though.I cut 3 sections of can to make it a bit more manageable and zip tied them down.


 
Posted : 05/10/2010 8:49 pm
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27.2mm posts are pretty common and easy to get. Not worth bodging IMHO.


 
Posted : 05/10/2010 8:51 pm
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hmm might be able to get away with 26.8 in 27.0 especially if you used a coke can. Not sure about 26.8 in 27.2 would be slipping alot


 
Posted : 05/10/2010 8:53 pm
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Not a cat in hells chance. Dont do it.
27.2 has got to be the most common size out there.
Spend another £30-£40 on a s/h Thomson.

30.0 clamp will be fine though.


 
Posted : 05/10/2010 8:59 pm
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Will give it a miss then. Anyone got a 27.2 thomson they want to sell? 🙂


 
Posted : 05/10/2010 8:59 pm
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No, but looking for 26.8!


 
Posted : 05/10/2010 9:06 pm
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Going to keep mine for a while til I've decided whether the 456SS is going to stay (hopefully will!), but will give you a message then to see if you still want it.


 
Posted : 05/10/2010 9:11 pm
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just get a bit of 0.2 mm shim steel shim steel that's what I did with a use post I had and it worked fine.


 
Posted : 05/10/2010 9:45 pm
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I have a genesis 27.2 seat post and I've got the seat clamp to match if you're interested. I've also got a 26.8 use suspension post both are practically brand new.


 
Posted : 05/10/2010 9:48 pm
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Dasha - I am if Tom's not. Any details?


 
Posted : 05/10/2010 10:03 pm
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Hi theotherjonv, I've emailed you on your profile E mail


 
Posted : 05/10/2010 11:33 pm
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My bodge hasn't slipped, in fact it's quite a tight fit.


 
Posted : 05/10/2010 11:45 pm
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why bodge something you can buy for chips? You canpick a decent 27.2 post for a tenner SH on ebay. I once fitted a27mm in a 27.2mm and it was fine. 26.8mm will not do the job though. The 30mm seat clamp is fine though


 
Posted : 06/10/2010 1:31 am
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I used a 27 in a 27.2 and it was blooming annoying as it kept slipping when I adjusting the height and also it has sl. deformed the tube as now its sl. too tight with a 27.2 so a 26.8 will not tighten up enough to be sweet! Try a DIY shim - that would prob work.


 
Posted : 06/10/2010 6:50 am
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Tom, check your WTD add


 
Posted : 06/10/2010 9:03 am

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