exploding USTs
bluechair84
Posts: 4,352
After hours and hours of trying to get my rear tyre into a ghetto tubeless state, I'm so very close. The set up is; Stans Crest + Highroller LUST (their UST tyre) + mavic (iirc) UST valve + 24"bmx inner rim strip (and some gaffa rimtape). I have finally been able to get the tyre close to 40psi whilst trying to ensure that the bead is fully seated and it is literally exploding from the rim with a pretty awesome puff of smoke. It frightens the crap out of me each time it does and sends next doors dog into a barking fit. What the hell could be causing the tyre to explode off of the rim!?
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UST Rims (in fact, most rims) should have an inner ridge that holds the tyre on under pressure.
Maybe the rim just won't work.
It seems that people who mess with conversions (myself included) always run into some kind of problem. Whereas the only setup that's guaranteed to work is an actual tubeless rim, with an actual tubeless tyre.0 -
Try a non-ust tyre? Most with stans rims use normal tyres.0
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I realised last night that valve cores are rim specific - I thought they were just valve cores for tubeless setups. So obviously, the mavic valve I was using wasn't never going to work on a Stans rim :oops: Bloody noob.
So I've ordered some Stans valve cores and will try again with the Higholler USTs I have seeing as the Rubber Queens just bubbled sealant out of the walls for 12 hours without ever sealing. I'd rather use the RQ to be honest, but I'd like to just get it working first of all.
I think Yeeha is probably right on this one, everything other than proper UST kit is just a bodge job.0 -
haha, whoops!0
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I don't see how the wrong valve would cause the tyre to blow off the rim :?bluechair84 wrote:I realised last night that valve cores are rim specific - I thought they were just valve cores for tubeless setups. So obviously, the mavic valve I was using wasn't never going to work on a Stans rim :oops: Bloody noob.
So I've ordered some Stans valve cores and will try again with the Higholler USTs I have seeing as the Rubber Queens just bubbled sealant out of the walls for 12 hours without ever sealing. I'd rather use the RQ to be honest, but I'd like to just get it working first of all.
I think Yeeha is probably right on this one, everything other than proper UST kit is just a bodge job.
Far more likely to just shoot the valve out like a bullet.0 -
I'm having various problems, pretty much everything that could go wrong is going wrong
I think the 24" BMX tube rimstrip is stopping the tyre from seating properly. I was also loosing air from around the valve. So, with the correct valve, I can do away with the BMX tube and hopefully there will be no more warfare going on in the house 0 -
I'll bet you a pint that you'll eventually come to the same conclusion as I did - that it's just not worth the hassle
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you have stans rims though, so surely you don't need to use the ghetto approach, just the yellow rim strip or equivalent gaffer tape?0
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Whoa, hang on... I just realised something.
Why would you have a 24" BMX tube, AND a Mavic valve? The valve is part of the BMX rim strip.0 -
That's the conclusion i came to. Even with a full UST setup it has to be ahuge improvement to warrant having to buy UST specific tyres and take the added cost that comes with them.YeehaaMcgee wrote:I'll bet you a pint that you'll eventually come to the same conclusion as I did - that it's just not worth the hassle0 -
Well i started out with a strip of gaffa to stop the tube from expanding into the spoke holes, and once the bmx inner was in it was pretty clear that it wasn't going to be air tight so the gaffa pretty much had the role of sealing the rim too. When air was still seeping through the valve hole, I cut out the valve from the tube and made room for the mavic valve core hoping the two together would make the system airtight. Still no joy. And I think the tube was stopping the tyre from seating correctly... Next in the experiment will be no tube at all, I'm going to replace the gaffa with electrical tape, the Stans valve core and a Highroller UST.0
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bet it would have been easier to just but the stans or joes kit0
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ricardo_smooth wrote:bet it would have been easier to just but the stans or joes kit
+1
Get a stans rimstrip and a tubeless valve. Simples0 -
I've been pretty poor this month due to other purchases so I thought the ghetto approach would be perfect for my budget but yeah, the stan's kit is looking good right now... 0
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Ah, I see. You've basically suffered what's known as a clusterfark
I don't think the rim strips will help you in this case. If the tyre's blowing off the rim, then the strips won't do anything to help.
The rim strips are supposed to wrap up the sidewalls of the rim, and the tyre then seals against them as the air pressure pushes the bead outwards. The idea is that you then have a fully enclosed rubber air chamber.0 -
In a word - tubes.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
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A week ago, if you'd offered me a clusterfark I'd have said, I don't know you from Adam but I reckon it could be an interesting drug fuelled experiment. Now I've experienced it first hand, I'll say never again thanks.YeehaaMcgee wrote:You've basically suffered what's known as a clusterfark0 -
If you have Crest Rims just get some yellow rimtape. Mavic valves should work, but Stans valves will certainly.
No need to go ghetto with a bmx tube. The yellow tape will suffice. Ensure the rim is perfectly clean (scotchbright it if you've already stuck fluid in before to ensure it's 100% squeeky clean,,,else the tape won't stick properly.
LUST tyre on Crest Rim is likely to be bloody tight. Stans list their rims as compatible with UST tyres....but I find that Tubeless Ready carcasses are much easier to fit. That said, if you can get it on, then it should inflate ok and shouldn't blow off.
Hope that's of some help!0 -
Yeah not using yellow tape is likely your issue, you don't need to ghetto or use the expensive stans rim strips, just valve + yellow tape. High Roller LUSTs are OK on my flows although they were a bit of a pig to get on. As you've had a few explosions with yours I'd be worried if I'd damaged the bead as well...0
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you dont need a rubber rimstrip with Crest rims. Only yellow tape and stans valve.
i believe most UST tyres will be difficult at best to fit onto Crests, you would be better off just using a normal High Roller if thats what you want.
According to JustRidingAlong, Maxxis are the best tyres to use for tubeless conversions.2011 KHS Full Susser Carbon 29er Race BuildClank wrote:M'eh, I might just go back to zapping it with frikken lay-zur beeeems. And sharks.0 -
LUST is not UST. LUST is some reinforced sidewall thingy. UST is the tubeless bead standard.
LUST = “Lightweight Ultimate Sidewall Technology" http://www.maxxis.com/Bicycle/Technology.aspx
UST = "Universal Systeme Tubeless"
My free advice is
a) do the ghetto conversion properly, use new bmx tubes and - as per yeehaa's post - make sure the tube is squashed by the tyre bead
or
b) buy an actual UST tyre that won't explode from the rim.
if the advice is useless, you can have your money back...0 -
Because LUST is what they use on their UST tyres, meaning that your knowlegde of acronyms is good but tyre application is bad, I'll ignore the free advice so I've no opportunity to be as equally dissatisfied with it 8) but thankyou all the same.
--edit--
taken from your link:Mavic wrote:An acronym which stands for “Lightweight Ultimate Sidewall Technology.” The outside of the casing is covered in a lightweight material and an airtight rubber compound resulting in a durable tire that is lightweight with excellent air retention0 -
+ a friccking tractor full of potatoes!!cooldad wrote:In a word - tubes.
Tubeless = far to much mither in my eyes. I love the idea and concept of it, its just way too much hassle for me! Now if tyre companies produced a foam like motorcross bikes and bead lock tyres NOW we'd be in business!!0 -
Yet there's plenty of people who are true converts - it's yet to be decided which side of the fence I fall... But after the epic fail of this weekend, I might join your ranks. One other attempt this coming weekend to see if I can get it going.0
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steelie600 wrote:bead lock tyres NOW we'd be in business!!
what, like UST? or tubeless ready?0 -
I can't believe some of the total bollocks I am reading on this thread.
No need for BMX tubes, ghetto set ups, gaffer tape.
LUST are TUBELESS. - they have UST symbols on the side.
You have a stans crest rim. Which, spend 2 minutes perusing the stans website...will show you hot to set up tubeless using only a valve and yellow tape (Note - yellow tape is NOT rimstrip - nor is it a stans or joes tubeless kit - both of which include rubber strips. These are intended for standard conversion).
Simply - tape the spoke holes....pushing the tape flush into the contours of the inner rim. Add the tyre. ensure tyre sits over the top of the valve. Pat the tyre evenly all the way around to ensure it's on the rim.
inflate with track pump.
It takes no more than 10 minutes including taping. I am a total bell when it comes to anything practical and this only took ME 10 mins...0 -
I can't believe how arsey people are getting over a ghetto set up. What you have recommended is not ghetto, it's the proper way to do it. The stans kit with sealant and and rim strip is £55 pounds in my LBS which I don't want to spend this month and I want to run my Conti's which are not USTs. So, I'm trying to work out the best way of doing it on the cheap. And the fact that LUSTs are tubeless has been covered and dropped.Mccraque wrote:I can't believe some of the total bollocks I am reading on this thread.
Good post.0 -
http://www.freeborn.co.uk/stans-notubes-yellow-rim-tape-1
http://www.chainreactioncycles.com/Models.aspx?ModelID=68565&utm_source=Google&utm_medium=Shopping&utm_name=UnitedKingdom
http://www.chainreactioncycles.com/Models.aspx?ModelID=38850&utm_source=Google&utm_medium=Shopping&utm_name=UnitedKingdom
Total: about £35. If you use different sealant (eg just riding along) or valves, it would be cheaper still. You will probably need to buy a funnel or similar, but you shouldnt have much difficulty finding one cheaply0 -
One of my Podium rims has stopped holding onto tyres mysteriously. I've had 4 explode (2 TLR Racing Ralphs, one TLR Dirty Dan, one normal Ralph), so I've just decided to replace the rim, as it's cheaper than destroying all my tyres.
It's been fine for a year, I've had 5 different pairs of Stan's rims, all sealed with yellow tape and run dozens of tyres, and until this one rim never had a problem.
Stan's is great, but like anything there can be dodgy ones!
FWIW I also had a UST Trail Blaster blow off a UST Crossmax years ago.0 -
