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PostPosted: Sat Jun 20, 2015 4:53 am 
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Joined: Sun Apr 05, 2015 10:27 pm
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Hello all,

I've just bought myself a pair of older Reynolds DV46's. I've got a pair of Conti Gatorskin 25c's that I reckon would be pretty good for the roads around here (volcanic chip & seal), just not 100% that these aren't a bit too wide for what's quite a narrow rim. I don't think they'll be hideously bulbous or anything...but what's the general consensus?

Cheers,

Simon


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Posted: Sat Jun 20, 2015 4:53 am 


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PostPosted: Sat Jun 20, 2015 8:18 am 
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Hi Simon, can you just fit one unglued and check it out? What is the width of your Reynolds?

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PostPosted: Sat Jun 20, 2015 11:23 am 
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I have some Mavic Reflex rims that are traditionally sized alloy tub rims and I have no issues running 25mm Veloflex Arenberg tubs on them.


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PostPosted: Sat Jun 20, 2015 11:38 am 
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Location: italy
i just installed a Gatorskin 25mm from Continetal 1 hour ago on my Nextie Bike 23mm wide tubular rim (rear)

mmm , not ridden yet (tomorrow) and inflated up to 8 bar to join rim/tire saoldering ... but it looks like Gator was born for a narrow rim ...

maybe it's only my point of view ...

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PostPosted: Sat Jun 20, 2015 11:54 am 
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Location: around Paris
BdaGhisallo wrote:
I have some Mavic Reflex rims that are traditionally sized alloy tub rims and I have no issues running 25mm Veloflex Arenberg tubs on them.


Mavic Reflex are 21+mm at brake track actually a very well known rim for cyclocross from long time ago


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PostPosted: Sat Jun 20, 2015 11:57 am 
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Location: around Paris
beanbiken wrote:
Hi Simon, can you just fit one unglued and check it out? What is the width of your Reynolds?


IIRC, old school Reynolds are between 19 and 20 mm at brake track

I think 25mm will fit fine anyway


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PostPosted: Mon Jun 22, 2015 12:00 pm 
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Location: Bristol
They'll fit, but I don't know why anyone would ride those tubs. The puncture protection isn't that great and they're as smooth as wagon wheels on cobbles.


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PostPosted: Mon Jun 22, 2015 12:23 pm 
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Not so long ago the "standard" for cobbled classics was 25+ tubs, maybe up to 27/28 on ambrosio nemesis or mavic reflex. Which are both around 21mm I think.
I suspect it depends on how deep the rim bed actually is as to if the tub will fit nicely or not, rather than the width.


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PostPosted: Sun Jun 28, 2015 12:51 pm 
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A 25c tubular will fit fine on a narrow rim. The base tape of a 21c vs a 23c vs a 25c is typically the same across tubulars. The base tape is where the tubular will interact with the rim so the volume of the casing won't matter. Back in the day people regularly ran 34c cyclocross tubulars on narrow width rims without issue including older style Reynolds.

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PostPosted: Mon Jun 29, 2015 9:37 pm 
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Thanks for the replies, all.

Had a look at the base tape and the rim bed and no problem fitting these. I suppose I'm as much wondering about the desirability of fitting a relatively wide tyre to a narrow aero rim. They're currently running Vittoria corsas with a bit left so I'll run them down to the canvas then have a think.

I originally bought the conti's to go on my nemesisis(?)- I've been really happy with the conti 4000 clinchers for everyday, beating the crap out of them use so I figured these might be a good fit for that kind of tougher wheel. Heard various unflattering things about conti tubs over the years but hey - they were on special - only one way to find out! The last set of Paves I got had appallingly misshapen, pinched, base tapes so not too mad on carrying on shelling out top whack for them - there's actually not that much in the way of choice for 24-25c tubs that aren't veloflex etc and stupidly expensive - hence the trial of the contis...

Cheers!

Simon


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PostPosted: Tue Jun 30, 2015 12:28 pm 
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Wide tyres have been around a lot longer than wide rims - if the tyre manufacturers start changing their tyre design to better suit wide rims then you might start to see issues on narrower 'old' width rims, but until then you will never had an issue as long as the tyre is glued properly.

Just remember: Tape is for wrapping presents.


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Posted: Tue Jun 30, 2015 12:28 pm 


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