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PostPosted: Mon Jul 04, 2011 11:53 pm 
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Joined: Wed Dec 22, 2010 2:22 am
Posts: 380
Location: Seattle, WA
What experience do people have with running either the Ksyriums and R-Sys wheel setup tubeless? I've read one person having trouble with them burping at low pressures thus defeating the purpose, anybody else have that problem?

Have people used tubeless tires or converted w/Stan's?

Thanks!

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2011 Trek Paragon 29er | Reba XX 120mm Fork | XX Drivetrain | 160mm White/Carbon Exiler CR Brakes | Thomson 90mm Stem & Post | Easton Monkey Lite Bar | X.9 Hubs to DT Swiss X470's | Schwalbe Rocket Rons


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Posted: Mon Jul 04, 2011 11:53 pm 


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PostPosted: Tue Jul 05, 2011 4:00 pm 
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Joined: Thu Apr 28, 2011 11:40 pm
Posts: 82
Location: Boulder, CO
It's not recommended. Of course the tire bed is airtight but the bead hook is traditional for clincher tires. A proper UST bead hook (and proper road tubeless tire/UST bead to go with) is much more suitable for tubeless because it holds the tire bead more securely. Same with the tire - it should be matched to the bead hook. The UST bead hook and tire bead shape is quite specific and allows the bead to lock very securely to the rim. Along those lines, the tire bead has to be perfectly in tolerance for diameter and allowable stretch under inflation pressure.

The risk you run is not so much burping air from low pressure, but blowing the tire completely off the rim.

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PostPosted: Wed Jul 06, 2011 3:31 pm 
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Joined: Thu Aug 19, 2010 11:32 pm
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Location: Jacksonville, FL
I have set up 3 sets of Mavics with tubeless tires. No problems. Of course Mavic would state it's not recommended because of product liability issue. However, a tubeless tire won't roll off a rim like a clincher so the only real worry is if Mavic's rim will withstand the inflation pressure - it will.

If anyone blows a Hutchinson tubless tire off of a rim using less than 110psi I'll replace the tire for free. :D

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PostPosted: Fri Jul 29, 2011 8:59 pm 
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Joined: Wed Dec 22, 2010 2:22 am
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Location: Seattle, WA
what valve cores did you use, did the Mavic ones work? That's the only place I have trouble sealing not tubeless wheels.

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PostPosted: Sun Jul 31, 2011 11:47 pm 
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Joined: Wed Dec 22, 2010 2:22 am
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Location: Seattle, WA
I have the Bontrager and Mavic cores and while the Mavic cores were all together too small just to seal the valve core hole it seemed like the Bontrager ones fit well. With that said I can't seem to get the tires to settle in on the rim. I am using non-tubeless tires though and will be trying tubeless tires tomorrow.

Any suggestions other than the bulldogs?

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2011 Trek Paragon 29er | Reba XX 120mm Fork | XX Drivetrain | 160mm White/Carbon Exiler CR Brakes | Thomson 90mm Stem & Post | Easton Monkey Lite Bar | X.9 Hubs to DT Swiss X470's | Schwalbe Rocket Rons


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PostPosted: Tue Aug 02, 2011 6:57 am 
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Joined: Wed Sep 08, 2010 8:39 am
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maggierose wrote:
I have set up 3 sets of Mavics with tubeless tires.
Same here, I don't have three sets, but I ran Hutchinson Atom tubeless on my Mavic Ksyrium SL Premium rims without issue. I ran them with 1.5oz. of sealant and never had any issues with them at low or higher pressure. I am a ~185lbs rider and I used them in the local crits. This combination was the best cornering wheelset I have run thus far and I've run quality tubular/carbon rims, various clinchers with different aluminum rims, AC MAG 300 tubulars, etc. The rubber on the Atoms is great IMO and the Ksyriums are bullet proof and stiff.

As with any tubeless, getting the tire on is the biggest PITA. I set my tires on my black roof (easily accessible from my rear deck), and let them get nice, hot and pliable before I tried mounting them. I had a bit of an issue getting the bead to lock so I had to move the pump quickly...next time I will just use my air compressor.

The Atoms tend to look and ride very thin at first, then they widen up a bit after riding them. The sidewalls are stiffer than normal clinchers and you can feel that riding. I just lower the pressure a bit to increase the ride comfort.

Christian.


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PostPosted: Wed Aug 03, 2011 8:27 am 
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Joined: Tue Sep 28, 2010 10:37 am
Posts: 4
I've mounted an Intensive (25) in the back and a Fusion (23) in front, on my wife's groceries bike.
Wheels are old Ksyrium SL, I had on hand, due to their closed bead I taught it's worth trying, this was to replace them after initial mileage by sexy and new stuff. I had to resort to the "old" NoTubes valve to get them going. With a bit of trimming.

In the meantime, 5 months later and around 2000 km, she once came home with around 2,5 bar on them but couldn't find anything causing the pressure loss.
I stick to 6-6,5 in the back and around 5-5,5 up front.
With groceries total "package can go up to 85 kg (only once) backpack and 2 Ortliebs up to the brim.

Maybe I'll get her a 6700 set but as for now this setup for her DH riding style is OK and performs as it should, not a single puncture in 5 month, it's called heaven, no whining from my dearest :thumbup:


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PostPosted: Sat Aug 06, 2011 12:58 pm 
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Joined: Wed Feb 25, 2009 7:58 pm
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Location: Lancaster, UK
Not used the Ksyriums but I've fitted tubeless (Atoms and Fusion 2&3s) to other non-UST rims (taped up Open Pros mainly) and had no issues with seating or burping. Run some sealant arond the tyre bead prior to inflation and they seal easily IME.


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Posted: Sat Aug 06, 2011 12:58 pm 


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PostPosted: Mon Aug 08, 2011 9:02 pm 
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Joined: Wed Dec 22, 2010 2:22 am
Posts: 380
Location: Seattle, WA
OK, update time. I feel like I am pretty good at setting up tubeless tires (I've been running tubeless MTB for 4-5 years now) and while I had a great deal of trouble(and eventually gave up) getting non-tubeless tires to catch. Then I traded a buddy for a pair of Bulldogs which caught right away with a good amt. of Stan's. They lasted with air for close to a week without having to air more, pretty good! We'll see as the season goes on how they hold up but now problems with burping yet. I'm riding them ~35-40psi and weigh 170.

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2011 Trek Paragon 29er | Reba XX 120mm Fork | XX Drivetrain | 160mm White/Carbon Exiler CR Brakes | Thomson 90mm Stem & Post | Easton Monkey Lite Bar | X.9 Hubs to DT Swiss X470's | Schwalbe Rocket Rons


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