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PostPosted: Sat Aug 09, 2014 6:19 pm 
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Joined: Fri Jul 06, 2007 8:44 pm
Posts: 98
Just about to pull the plug on some boras. As these have a narrower rim than some of the newer wheels am I ok to use 25 tyres?

Thanks.

made thread title more descriptive


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 Post subject: Re: Campagnolo Boras
PostPosted: Sat Aug 09, 2014 6:23 pm 
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Joined: Wed Dec 29, 2010 2:16 am
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You're okay but that's not the best setup in the front. #drag. Put a 23 on the front and keep the 25's for the rear. [emoji41]

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 Post subject: Re: Campagnolo Boras
Posted: Sat Aug 09, 2014 6:23 pm 


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 Post subject: Re: Campagnolo Boras
PostPosted: Sat Aug 09, 2014 7:05 pm 
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I'm running 25's on my Boras, both front and rear. Much prefer the added stability using a 25 up front vs a 23. However, if you're buying new and given that new Boras are just around the corner, I'd probably wait for the new ones which will be a little wider with a rim bed that will fit the 25's, or bigger, a bit better. And maybe even be a little more stable, don't know. The only thing about running 25's on the current Boras I find is that when my brakes are where I like them and the tires are inflated, it's a squeeze to get the tires out even with the calipers released (Campagnolo). But no big deal. I guess if you're getting a screamin deal on a set of current Boras then fine, as long as you know there's new ones coming soon. Nothing worse than buying something that you think is current only to find out a week later that a new model is already being released. Either way, I'm sure you'll like them.

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 Post subject: Re: Campagnolo Boras
PostPosted: Sat Aug 09, 2014 8:41 pm 
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Joined: Fri Jul 06, 2007 8:44 pm
Posts: 98
Thanks for the help.

I'm buying a used set as this is my first go at seeing how I get on with tubulars. This way I'm only going to be spending £550.


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 Post subject: Re: Campagnolo Boras
PostPosted: Sun Aug 10, 2014 3:11 am 
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At a set of used boras at that price sounds like a steal, I'll go for it and not think too much about the upcoming one. I'll go for 23 in front and 25 behind though for the aero benefit, since tubulars will give you a plush enough ride already.

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PostPosted: Sun Aug 10, 2014 6:00 am 
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Joined: Sun Oct 05, 2008 8:09 pm
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Location: Aix en Provence
25 are not a problem on boras.


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PostPosted: Sun Aug 10, 2014 3:47 pm 
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550 for a set of Boras is a super price.
You will love tubular and i think 23front and 25 on the rear wheel will be more than ok...
Enjoy them


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 Post subject: Re: Campagnolo Boras
PostPosted: Mon Aug 11, 2014 11:00 am 
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Joined: Mon May 26, 2008 12:21 pm
Posts: 93
Location: UK
TwiggyTN wrote:
You're okay but that's not the best setup in the front. #drag. Put a 23 on the front and keep the 25's for the rear. [emoji41]

Sent from my Galaxy Nexus using Tapatalk


I suspect this may not be true but it's an un-provable hypothesis wither way as it depends on how you are defining "aero".

Wider tyres are only *more aero* (whatever that actually means in the real world) as an interactive component with a suitably shaped rim, according to all of the data that I have reviewed.

The problem is that we don't have a standard definition for "more aero" or even "less aero" - we don't have parameters for the frame, wheels, legs or any other part of the rider-wheel system standardised, we don't have a standard set of yaw angles or air speeds and last we don't have standard cadence rate for our yet to be defined legs making a mess of that unknown airspeed and it's un-defined yaw angle. And for uncertainty factors in trying to produce an accurate, meaningful, quantitative measurement, that is just for starters ...

In a wind tunnel, in a non-revolving test factoring all of the above out, it'll still depend on the precise rim shape and I have never seen that data for a Campagnolo Bora in public-land - not that I have looked that hard because it would be real-world irrelevant anyway (with apologies to all the would-be aerodynamics weenies out there ...)

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PostPosted: Mon Aug 11, 2014 8:23 pm 
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Joined: Fri Jul 06, 2007 8:44 pm
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Thanks everyone for all your help. I'm picking the boras up in a few weeks.


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PostPosted: Tue Aug 12, 2014 4:35 pm 
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Joined: Mon Aug 20, 2012 10:32 am
Posts: 35
Location: UK
Bora Ones or Ultras/Ultra Twos? Great price whatever.


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Posted: Tue Aug 12, 2014 4:35 pm 


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PostPosted: Tue Aug 12, 2014 8:35 pm 
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Joined: Fri Jul 06, 2007 8:44 pm
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They're the Bora one's


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