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PostPosted: Wed Apr 29, 2015 1:13 pm 
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Joined: Wed Sep 03, 2008 2:42 pm
Posts: 89
Location: Aberdeen, Scotland
Has anybody converted a set of Mavic R-Sys SLR wheels to tubeless.

I see they sell UST Valves and tape, but is that for specific UST wheels from Mavic or can they be used on clincher wheel sets?


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PostPosted: Wed Apr 29, 2015 3:39 pm 
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Joined: Thu Mar 08, 2012 11:43 pm
Posts: 1563
It wouldn't change that the hook isn't designed to seal a tubeless tyre bead.

With tubeless there's a lot of stuff that'll work, but whether it works all the time is a different story...


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PostPosted: Wed Apr 29, 2015 4:36 pm 
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Joined: Fri Jun 01, 2012 3:00 pm
Posts: 61
Location: San Sebastian
viewtopic.php?f=4&t=89766&hilit=ksyrium+tubeless


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PostPosted: Wed Apr 29, 2015 4:39 pm 
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Joined: Tue Sep 11, 2012 6:07 pm
Posts: 1041
Location: The Lone Star State
UST is a standard used by rim and tire manufacturers to guarantee a certain fit (the wheel will hold onto the tire - the beads are matched). UST allows you to establish a tubeless seal without the need for sealant (Shimano is the manufacturer that comes to mind, and they do not want riders using sealant in their rims). Most manufacturers who claim "tubeless" don't adhere to the UST standard (because they don't want to pay for the licensing), and that's why you need sealant to seal the tire to the rim - generally, there's nothing special about the tubeless bead on the rim - only that the rim has a center channel to let the tire sit in, making it easier to inflate and seat.

I've converted Reynolds, ZIPP's, Bontrager (pre-TLR models) and Mavic's over to tubeless, and I've never encountered a problem with the tires sealing onto the rim, or the seal failing down the road. Any clincher rim can be converted to tubeless, and will hold the tire in place.

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Trek Crockett, Madone, Superfly, SpeedConcept & Cobia


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PostPosted: Wed Apr 29, 2015 5:32 pm 
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Joined: Wed Sep 03, 2008 2:42 pm
Posts: 89
Location: Aberdeen, Scotland
FIJIGabe wrote:
UST is a standard used by rim and tire manufacturers to guarantee a certain fit (the wheel will hold onto the tire - the beads are matched). UST allows you to establish a tubeless seal without the need for sealant (Shimano is the manufacturer that comes to mind, and they do not want riders using sealant in their rims). Most manufacturers who claim "tubeless" don't adhere to the UST standard (because they don't want to pay for the licensing), and that's why you need sealant to seal the tire to the rim - generally, there's nothing special about the tubeless bead on the rim - only that the rim has a center channel to let the tire sit in, making it easier to inflate and seat.

I've converted Reynolds, ZIPP's, Bontrager (pre-TLR models) and Mavic's over to tubeless, and I've never encountered a problem with the tires sealing onto the rim, or the seal failing down the road. Any clincher rim can be converted to tubeless, and will hold the tire in place.


Thanks for this, what valves and Tyres did you use when converting the Mavics?


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PostPosted: Wed Apr 29, 2015 9:14 pm 
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Joined: Tue Sep 11, 2012 6:07 pm
Posts: 1041
Location: The Lone Star State
Valves were Stan's and tires were Hutchinson Piranha's (it's a CX bike).

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Trek Crockett, Madone, Superfly, SpeedConcept & Cobia


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