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Why my new 700x47 tires so much smaller than old 700x48/29x1.9 and tubes too big?

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Why my new 700x47 tires so much smaller than old 700x48/29x1.9 and tubes too big?

Old 01-03-18, 01:17 PM
John Redcorn
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Why my new 700x47 tires so much smaller than old 700x48/29x1.9 and tubes too big?

I have had Geax Evolution II tires labeled 29x1.9 and in a smaller label on them 48-622, they are worn out, my new tires Continental Ridetour came in last night they are labeled 47-622 and in a smaller label on the rremovable paper tag only it says 28x1.75 they seem a whole lot narrower. Was not expecting that.

The tubes I have been using in the geax are kenda and I think they said up to 29x2.1 I put them in the continentals and there's a tiny little fold in each one going laterally across the tube in the last place I pushed it into the tires. I mounted them up and aired them up to 60 hoping that little fold goes away with air pressure but ofc I have no way of seeing if it did.

I haven't rode yet it's way too cold for me except maybe a short ride this afternoon but am I asking for trouble? am I going to get a flat real fast like? Or is this mostly ok?

Last edited by John Redcorn; 01-03-18 at 01:24 PM.
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Old 01-03-18, 01:26 PM
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The fold is not a good thing, and may cause trouble down the line. Personally, I'd replace the tubes with a smaller size.
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Old 01-04-18, 10:14 AM
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Some Contis seem to run a bit smaller than nominal spec. Several of us who use Continental Speed Rides have noted the nominal 700x42 size actually works about to be about 700x38. The Speed Rides are noticeably narrower and less wide than my other bike's 700x40 Michelin Protek Cross Max, which several users have described as running larger than nominal spec. Great tires though.
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Old 01-04-18, 10:48 AM
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tire width measures differently in real life vs factory design depending on rim widths used. simple.
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