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I've been considering purchasing a Boardman Pro CX Cyclocross Road Bike Large 2010 (http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_736229_langId_-1_categoryId_165710#dtab).

The spec says the wheels are 700C and that it comes with 700 x 35C tyres. I'm wondering, should it be also possible to fit some thinner road tyres with sizes 700x20c, 700x23c or 700x25c?

Thanks.

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up vote 5 down vote accepted

Yes, you can! It looks like that bike comes with Mavic CXP23 rims, which can fit down to 19mm tires I think. You would defiantly have no problem with 700x23 tires. I'm surprised it comes with 35, that seems a bit wide for those rims, but you should be OK.

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Agreed that 35 seems way wide for that rim. I would think it would feel really squirmy in turns. –  bikeboy389 Dec 9 '10 at 21:15
    
As cyclocross is so often a muddy sport any extra squirm from tyres is negligible! Seriously though I know a few people who have Boardmans and no one is complaining about squirmy tyres. –  Jackson Dec 10 '10 at 11:22
    
FWIW, in that price bracket I would (and did) look seriously at the Ridley Crossbow (or the X-bow as they're branding it for '11). Although if you're buying from Halfords, I assume it's because of the Cycle to Work, in which case you might not have the flexibility. –  Unsliced Dec 13 '10 at 17:13
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