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PostPosted: Thu Jan 17, 2013 12:17 am 
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Joined: Tue Aug 02, 2011 9:20 pm
Posts: 1570
Location: New Zealand
Looking at Ribble Cycles and they have the clincher Challenge Open Grifo 33 Cross Tyre listed as well as the Challenge Grifo 32 Cross Tyre. Looking at the specs I can't spot the difference.

http://www.ribblecycles.co.uk/sp/road-track-bike/challenge-challenge-tyres-road-tri-track-folding-challenge-open-grifo-33-cross-tyre/chaltyrf291

http://www.ribblecycles.co.uk/sp/road-track-bike/challenge-challenge-tyres-road-tri-track-folding-challenge-grifo-32-pro-folding-tyre/chaltyrf321

So what is the difference other than the word Open and the number?? Also is there any difference between the white tread and the black tread?

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2012 BMC SLR 6.02kg http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=110390


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PostPosted: Thu Jan 17, 2013 2:31 am 
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Joined: Fri May 01, 2009 8:48 pm
Posts: 105
Despite their pictures and stats, the "Grifo Pro" that I have seen is only 60tpi and has black sidewalls. This may account for the price variance.

http://www.universalcycles.com/shopping ... tegory=178


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PostPosted: Thu Jan 17, 2013 2:58 am 
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Joined: Tue Aug 02, 2011 9:20 pm
Posts: 1570
Location: New Zealand
Ahah! Trickery. Cheers for pointing that out to me.

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PostPosted: Thu Jan 17, 2013 7:44 am 
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Joined: Sat Sep 05, 2009 11:20 am
Posts: 1401
white version on the tub and open are meant to be grippier as well

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"Step forward the climber and all those who worship at the altar of lightness" - R. Millar


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PostPosted: Thu Jan 17, 2013 8:43 am 
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Joined: Tue Apr 12, 2011 8:08 am
Posts: 2251
Location: Pedal Square
euan, where does this info about grip come from? Is it supposed to be about the rubber or the thread? The Challenge website is very scarce on details.

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Bikes: Raw Ti, 650b flatbar CX


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PostPosted: Thu Jan 17, 2013 8:55 am 
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Joined: Sat Sep 05, 2009 11:20 am
Posts: 1401
Crosslore. Just through talk about tyres at races. If you search there are things like this from VN

http://velonews.competitor.com/2009/09/ ... tufo_85785

To be honest just stick with the black

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"Step forward the climber and all those who worship at the altar of lightness" - R. Millar


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PostPosted: Thu Jan 17, 2013 9:27 am 
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Joined: Tue Apr 12, 2011 8:08 am
Posts: 2251
Location: Pedal Square
Thanks euan. Yeah, got the black XS on my do-it-all bike (except races), and really liking it.

Surprised about the mention of 34mm Challenge tyres though, not seeing them on the website.

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Bikes: Raw Ti, 650b flatbar CX


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