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Old 01-21-16, 11:58 PM
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carleton
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Originally Posted by WeightySteve
What makes you say the IO needs a 19?

According to IO | Mavic - United Kingdom the specification is 18 to 22 mm and looking at Manchester (my "home") Velo's info Track bike specification - National Cycling Centre they recommend 22 (regardless to wheel choice).
I missed this question.

The Io has a noticeably more narrow rim bed than a standard wheel (including it's mate, the Comete). So putting a 22mm tire on it will mushroom over the sides quite noticeably. Trust me. I've owned the set before and I'm test fit a 22 on there and it's awful. You want a 19mm.

You want a standard 22 or 23mm on the rear to suit the standard sized rim bed.

Here I have a Veloflex Record 19 on the front and Conti Steher 22 on the rear:
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