Numpty tyre sizing ...
 

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[Closed] Numpty tyre sizing question

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 PJay
Posts: 4818
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Topic starter
 

I've been riding 26" wheels and mountain bike tyres for years but have just ordered my first 29er frame.

I've been looking at 29er gravel/multi-use type tyres; some, such a the Schwalble G-One are sized in mountain bike terms which I understand (eg. 29x2.35) whilst others, super as Specialised's Sawtooth are 700x42c.

Rim allowing, I know that either will fit a 29er rim; how do I convert 42c (or other metric sizes) into inches?


 
Posted : 07/10/2017 8:07 am
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I ignore the letter on the end and convert the last number into either inches or mm, depending on which one you prefer


 
Posted : 07/10/2017 8:10 am
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42÷25.4


 
Posted : 07/10/2017 8:51 am
 PJay
Posts: 4818
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Great, thanks to you both; that makes it easy!


 
Posted : 07/10/2017 12:33 pm
 PJay
Posts: 4818
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Okay, so I've just spotted this is a tyre review:


They’ll be available in a UCI-friendly 28 x 1.3 (700×33)

33÷25.4 is pretty much 1.3" but why 28 (not 29) when it's a 700mm tyre?


 
Posted : 07/10/2017 5:13 pm
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Because 29ers aren't really 29" either 😆


 
Posted : 07/10/2017 5:19 pm

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