|   Moab+Bullit+Stan's. | TNC
May 26, 2002 8:29 AM | | I know most of you guys on this site do more XC oriented buildups, but I just gave my Stan's setup as big a test as I can dish out. Many of you know I'm more of a proponent of UST tires on conventional wheels because I do more freeride or big hit type riding. I just got back from 10 days in Moab with a 7" travel front/rear Bullit. I have a set of Sun Rhyno Lite rims laced to XT disc hubs with 14/15 DB spokes. They are sealed up with Stan's taping system and mounted with Specialized Enduro Pro 2-Bliss 2.2 tires. Moab is a great test bed due to the kind of traction, speed, and rocky conditions available there--Porcupine and Amasa Back possibly being the best. You're often going at warp speed, dropping off ledges, and occasionally hitting the lip of an approaching ledge in a miscalculation. With 7" of travel you can get away with it, but it still puts a lot of pressure on the tires, wheels, and the bead separation issue. During the entire trip of 10 days, I lost no air pressure, had no bead separations, and no flats (cactus, goatheads, and pinch flats are the main flatting issues there). I was so impressed with the bite of these tires. I use an 8" rotor on front, and the tire was often under max braking force when striking ledges and rocks, yet no bead separations--I ran 38-40 psi. The tires lost no knobs and had no tears or other damage--BTW, the Pro models of Specialized tires use a harder compound which is recommended for rocky, high traction areas. I just wanted to post this experience to let you know how this setup worked. Right now there are not many options for building freeride wheelsets with tubeless rims. This has convinced me that tubeless rims are not necessary for DH/freeride wheelbuilds just as they aren't for XC setups. I'd like to test a set of large conventional tires on my wheels to see if I get the same results, though I'm still concerned with the bead separation I've seen with conventional tire and rim combinations. It may be that as the tires get larger they adhere to the rim better. Anyway, for now, it's nice to be able to run just about any wheel setup I want. |
| Thanks for the report! | AZ-X
May 26, 2002 9:00 AM | | Let us know about the conventional tire testing. It would be cool to find out how you do with something like a Hutchinson Scorpion or a Specialized Enduro Pro non-UST tire. |
| Great detailed report! Thanks! nm | MPH
May 27, 2002 3:59 AM | | |
| UST rim strips for 27- 34mm rims!!! | Stan
May 27, 2002 4:58 AM | | I now have UST rim strips for free ride and downhill. Wade Bootes is using my system and just won at Big Bear with them.
I have designed them to hold even better than my standard rim strips. You will need my 27 to 34mm strip for you Rhyno Lite rims. I have attached an email from a downhill pro who is also using my system.
Stan
Hi Stan
Did a session of big drops yesterday on the DH wheels, 4 drops all in a row all between 6 and 10 feet high!!! pressure: 25 psi front , 28psi rear on my third run, i landed on a piece of glass ( "this was near a local party rock") as I landed, the glass cut my tire and I got sprayed with sealant!
when I had stopped at the bottom, It was sealed !!! it was a 1/4 inch gash!!!
awsome! very impressed!
should I patch the tire inside? or should i not use this one for racing anymore?
thanks Stan, your system rocks!!!!
Tim |
| I'm gonna try 'em. | TNC
May 27, 2002 9:25 AM | | I knew you were working on them but didn't know they were out. You'll hear from me soon. Thanks. |
| 700c strips please!!!!! nm | mtc
May 27, 2002 4:14 PM | | |
| 700c strips please!!!!! | Cloxxki
May 27, 2002 10:24 PM | | Yes, that would be great! I bet it's gonna take at least more than a yea. Especially since 29" rims typically vary between 19mm and 24mm in width, so more versions of the rimstrip are needed. 26" XC rims are much closer to 21mm overall, if I'm not mistaken.
For latex-tubeless on a 29er, I plead for my self-invented, never produced, system with a non-stretchable tube.
You tape the rim.
A tube, simular to a 18mm track tubular sits in between the beads, and cligs onto the rim when inflated. If does not expand, pressure just rises, pressing the bead against the rim, hopefully firm enough (at some 5-7 bar) to avoid any blowoffs.
In the Non-Stretchable tube should be a second valve to let air through to the main chamer, that of the tire.
Effective air volume in the tire does down by some 10-15%, but the NST will offer a slight cushion again pinchflats.
I'm thinking of a NST that is rubber-coated, to already provide a good airtight seal with it's contactarea with the tire's inside. Then the pressure of the NST pressing the bead to the rim, and the tapejob.
For 24mm rim a 18mm "tube" may suffice, but smaller rims also need smaller non-existing tubulars. Tufo makes a track/TT tubular that is 700c*18mm at 100g...
The second valve is what worries me most, without it available maybe one should inflate the tire first and then the NST for holding the air, but then it would be hard to put more air in the tire at a later time...
Any serious thoughts are welcome! |
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