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Old 2013-01-20, 11:58 PM   #1
Killian
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Road tire for wide rim

Did a search and couldn't find anything real definite so here goes:

Looking for a road tire to try some road on my 29. Problem is, my rim is a 42mm wide Dominator 2. Sounds like about the only road tire that'll fit it without blowing off is the 29 x 2.35 Big apple? But those sound like they handle road crown poorly.

So, my question is, is there a road tire that'll fit a wider 42mm rim but isn't so sensitive to road crown? Kind of drawing a blank from looking through other threads and looking at tires.

Sorry if this has been asked too many times. Just can't seem to find anything real concrete.

Thanks.

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Old 2013-01-21, 04:48 AM   #2
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You should be able to use any tire that is at least as wide as the rim. I don't have any tire recommendations for you but what you are looking for is something that will have a round profile/cross section on the rim. try to avoid tires with either a squared off profile or a raised centre tread.

The schwalbe marathon seems to get the nod quite often though I have never tried one.
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Old 2013-01-21, 05:59 AM   #3
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I've been thinking of getting the schwalbe marathon as well but where can I get one in Canada?
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Old 2013-01-21, 06:12 PM   #4
Killian
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Okay. Just seems like people have had problems with ~2" tires blowing off their 47mm KH rims. Maybe since my rim is only 42mm? If it'd work, I'd just as soon use a 2" big apple or 2" marathon. I did ride a 2.1" SB8 over the summer without issues...

Just don't wanna get a tire only to blow it off the rim and destroy a tube.

Thanks for the input!
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Last edited by Killian; 2013-01-21 at 06:13 PM.
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Old 2013-01-21, 06:27 PM   #5
Killian
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Tires I'm looking at:

Big Apple 2.35 or 2.00
Marathon Supreme 2.00
Big Ben ~2.1?
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Old 2013-01-21, 07:25 PM   #6
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Normally I'd say: just look up what is the minimum recommended width as according to ETRTO, whose table Schwalbe cite on their website, but sadly it doesn't extend far enough into the realms of special mining applications for rims that wide.
Your inner rim width should be about 36mm or "36c" (42-6, rule of thumb).
The table goes only to 29.
Extrapolating with a quadratical model (and adapting the model to fit all data points), I calculated a minimum width of 75mm or 3". A ridiculous result.
Maybe the original table in the ETRTO standard is more complete. You could buy it for a mere 114 Euros to look up the recommendation, a real bargain.

Or more easily: just make use of nlouis1's experience and try tyre width=inner rim width+6 -> 42-622, maybe Vittoria Randonneur.
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