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PostPosted: Tue May 13, 2014 1:18 pm 
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Joined: Sat May 12, 2012 8:32 am
Posts: 743
Location: Adelaide, Australia
Hi,

I believe you want 20.5mm wide rims, I think the 23mm rims are for cross use. Not a tubbie expert, but I think the edge of the 23mm rim may strke the ground on hard cornering - don't quote me on that though. That said, Zipp firecrest tubbies are much wider than 23mm, for aero effect.

For Tubbies wide = more aero

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Posted: Tue May 13, 2014 1:18 pm 


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PostPosted: Tue May 13, 2014 5:12 pm 
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Tubbie Guru

Joined: Tue May 03, 2005 2:20 am
Posts: 5851
Location: Belgium
Hi,

Define rim width.

Technically it is the outer width of the rim measured across the rim bed. That is what defines the minimum tyre width you can mount on the rim and that should at least be equal to this width.

Ciao, ;)

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PostPosted: Tue May 13, 2014 5:20 pm 
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Posts: 1244
Location: McCall, ID
I've found for tubulars rim width isn't nearly as important as for clinchers. I don't think you'll see any real world difference between the two. It's all about the tires!

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PostPosted: Wed May 14, 2014 7:00 am 
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Joined: Wed Jun 01, 2011 7:53 am
Posts: 699
Yes many do ride 22 and 23mm tires on wide firecrest rims. That is also what Zipp recommends for firecrest rims. Personally i like 25mm veloflex or fmb tires on mine.

To answer the OP, go with the 23mm wide rims if you can, it's a more modern design, better aero, feel and works better with even wider tires like 25mm.


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