Rim width vs. tyre ...
 

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[Closed] Rim width vs. tyre width question

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Posts: 193
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29er wheels - with 29mm internal width

Just looking at a 3 inch Chronicle tyre and packaging says minimum internal rim width 40mm

Anyone tried this and survived?


 
Posted : 19/06/2018 12:33 pm
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I haven't but I wouldn't.  A 3 inch tyre is going to end up a bit of a funny shape on e 29mm rim.

EDIT : and are you sure they'll clear the frame/forks?


 
Posted : 19/06/2018 12:38 pm
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Back in the day the "rule" seemed to be 1mm for each 0.1" so a 3" tyre would go on a 30mm rim just fine. But we've got new rules now 🙂


 
Posted : 19/06/2018 12:44 pm
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Presumably the manufacturer has actually tested this hence the statement on the packaging. There'll be a bit of a safety margin involved and the tyre may actually be OK on 35mm ID rims.


 
Posted : 19/06/2018 12:47 pm
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I'm running 2.8 and 3" Nobby Nics on 25mm rims, I'm no riding God but it's worked (and to me, looks) OK, albeit on the narrow side.


 
Posted : 19/06/2018 12:54 pm
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It will work and be ok on a technical level, but it will make the tyre an odd shape, also you will need to run the tyre at a higher pressure to avoid it folding over when cornring. This will remove at a stroke the main reason to use a 3” tyre, as the whole point is the ability to run it at lower pressure.


 
Posted : 19/06/2018 12:58 pm
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Yeah it should fit it's on some Stooge forks

Can't be bothered with new rim so will look for something narrower


 
Posted : 19/06/2018 1:28 pm
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I’d agree that 35mm may be as ‘narrow’ as you want to go.  If building, 35 rear and 40 front may be a good compromise.

The tyre *will* go on a 29/30mm rim and will not catch fire/kill you but if the mfr is calling for a much wider rim you can expect a nice square footprint to be over-round and may find the edge knobs further round than expected. Depending on design this may or may not ride well.


 
Posted : 19/06/2018 3:33 pm

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