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PostPosted: Sun May 11, 2014 7:41 pm 
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Joined: Fri Jan 24, 2014 5:43 pm
Posts: 70
Location: Belgium
Does anyone have some experience with their carbon clinchers in the mountains? I'm talking about 20km descents (like the Alpes).

I really was convinced of buying some carbon clinchers but i've read some horror story's about failures in descent.. Luckily I only weigh about 129lbs and planning to use 25mm tyres, I assume that would decrease the risk?


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PostPosted: Sun May 11, 2014 9:18 pm 
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Joined: Tue Nov 11, 2003 9:47 pm
Posts: 2154
Location: Santa Cruz, California, USA
I have used them on 20 mile 55 mph descents. No problem. But that sort of descent does not heat the rim as much as one with a lot of tight turns. I've used them on some of those as well and not had a problem. There's a couple really steep and difficult ones locally where I'd hesitate to use them.... very tight turns, bad pavement and 13% or steeper. But from what I've read the Alps aren't that steep.

I'm a confident descender. Someone who is not will brake a lot more and heat their rims more.

The 25mm tires themselves won't make it less likely to have a problem but running lower pressure will. What happens is the rim wall get hot enough to get a bit soft and the tire pressure pushes it out. That part gets even more brake heat as a result, thus more heat, more bulging, etc.


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PostPosted: Sun May 11, 2014 9:26 pm 
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Joined: Fri Jan 24, 2014 5:43 pm
Posts: 70
Location: Belgium
Yes, what I've read about 25mm is that you could ride them with a little less pressure than 23mm and still have descent performance. So that was my point :).

French alps not, but take a look at the Giro :D


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PostPosted: Mon May 12, 2014 12:11 am 
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Joined: Tue Nov 11, 2003 9:47 pm
Posts: 2154
Location: Santa Cruz, California, USA
Something like the Stelvio with its hairpins would be ok (for me). The grade is 10% or less and the straights are long enough to let the rims cool. The roads where I would not want to use carbon clinchers have 15 mph turns one after another or have utter crap pavement (because they're abandoned) which you have to slow for, all on a 12-15% grade. For you SF bay area riders, jamison and alba would be the former and hicks the latter. I've ridden down Page Mill and the east side of Mt Hamilton with no problem. That one is the steepest most technical descent that we race down in NorCal. For the race they station medical people and ambulances all along it because there's a lot of crashes.

The ambient temp has an effect too. If it's 100 degrees (F) vs 60, you're that much closer to the temp where the epoxy gets soft before you have even started down the hill.

Doesn't it rain in the Alps in the summer? Carbon rims don't brake well when wet.


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PostPosted: Mon May 12, 2014 7:37 am 
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Joined: Fri Jan 24, 2014 5:43 pm
Posts: 70
Location: Belgium
I'm going for some alu/carbon Dura Ace wheels..

My biggest concern are the gran fondo's in the Alps, if there are 20 people blocking my way in the descents, I can't brake the way I should brake with carbon clinchers. And I would probably be thinking all the time about the braking and lose time in the descent.

And yes, it does rain sometimes over there :D

So my plan is some Dura Ace wheels and light weight skewers. Thanks for your advice eric!


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PostPosted: Fri May 16, 2014 6:59 am 
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Joined: Fri Nov 26, 2010 2:06 am
Posts: 40
Just some more updates...

I now have 8000 miles on my 2014 U shaped 38mm farsports. No ISSUES at all. I do keep the wheels extremely clean. I wash the brake surface, as well as inspect them, every three rides. Unless there is rain. Then I immediately clean the wheels. I Keep the brake pads very clean as well. Over all Im very satisfied with this wheelset.

Braking hasnt been an issue at all. In fact Ive gotten very adjusted to how it brakes. The still is very little wheel squeaking , but they are louder when braking. But that seems to be a carbon wheel thing.


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PostPosted: Tue May 20, 2014 7:13 am 
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Joined: Sun Jun 10, 2012 1:11 am
Posts: 739
Anyone here tried their cyclocross 38mm? Didn't see a sticky like this on the cyclo forum.. thought I post here since I'm looking for a set in 38mm.

Sent from my SGH-M919 using Tapatalk


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 Post subject: Tyre width??
PostPosted: Fri May 23, 2014 12:15 pm 
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Joined: Fri May 23, 2014 12:06 pm
Posts: 1
Hi guys

After much reading here I've just taken the plunge on a set of the 38mm clinchers from Far Sports.

Have gone for the 23mm wide "New U shape" design with EdHub 2:1.

My question is about tyre size... I plan to buy the Conti GP 4000S II's, but not sure whether to go for 23mm or 25mm width?

I will be using mainly for fast club runs and the occasional road race/crit.

I understand that one benefit of 25's over 23's is the reduced rolling resistance at the same pressure, but is there an aero consideration here too?

Do you guys prefer a 25mm tyre on a 23mm rim, or match the tyre to the 23mm rim?

Thanks!


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PostPosted: Tue May 27, 2014 7:27 pm 
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Joined: Fri Apr 20, 2012 9:04 pm
Posts: 315
Quick question. Ordered an 11 speed freehub for my ED hubs which I bought from farsports early last year. Checked with Kyle that it was compatible bit concerned about the clearance (see picture).

Image
Image
Is this normal? First experiences of 11 cassettes and not sure how much tolerance there is.


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PostPosted: Tue May 27, 2014 9:39 pm 
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Joined: Tue Nov 11, 2003 9:47 pm
Posts: 2154
Location: Santa Cruz, California, USA
That looks ok. The lockring only has to clear the frame.
You used no spacers, right?


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PostPosted: Tue May 27, 2014 9:46 pm 
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Joined: Fri Apr 20, 2012 9:04 pm
Posts: 315
Correct - no spacers. Will give it a go- fingers crossed. As an interesting aside, I also got some farsports black pads - def not WW gear about 10g a set heavier than swisstop black prince. I was also surprised how much bigger the block contact surface is compared to the swisstop.


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PostPosted: Wed Jun 04, 2014 3:13 am 
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in the industry

Joined: Mon Jul 09, 2012 2:22 am
Posts: 89
Location: N96 Road jingquan, Jimei District, Xiamen city, China
Is Douglas Breault here?
I got your email this morning about wheels enquiry, and replied you directly.
But the email was returned, I donot know why?
Could you please contact me again by another email account?

My skype is farsports12

_________________
FarSports carbon wheels
Email:sales2@farsports.cn
Store:http://www.aliexpress.com/store/1679325, all store enjoys 8% off till 30th Sep.


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PostPosted: Fri Jun 20, 2014 4:44 pm 
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Joined: Tue Oct 04, 2011 5:15 am
Posts: 106
Anyone know the typical shipping time via EMS to the US nowadays?


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PostPosted: Sat Jun 21, 2014 12:57 am 
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Joined: Sun Jun 10, 2012 1:11 am
Posts: 739
Mine took about 6 working days

Sent from my SGH-M919 using Tapatalk


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PostPosted: Sun Jun 22, 2014 7:38 pm 
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Joined: Fri Apr 20, 2012 9:04 pm
Posts: 315
First ride in the farsports black pads today and IMO they are way better than the SS black prince they replaced. I found the braking more progressive and less noisy. Have to see how they wear in but really pleased so far ---- lucky as I imported 4 sets!


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