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Czech Rep.
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Discussion Starter · #1 ·
Hi folks

I have tried to go tubeless on my 29 bonty Duster rims with bonty XDX tyres (both say "tubeless ready"), using correct strips, stems, sealant (all bonty) and this manual: http://media.bontrager.com/owners_manuals/tires/Bontrager_Tubeless_Ready_Tires.pdf

When the pressure was nearing 4 atm (when seating the beads), i was deafened (with the "Call of Duty" ear ring afterwards) by the tyre popping out of the rim. Normally i would start again, but the rim was completely bent (visible by plain eye even without rotating the rim). How is this possible, what could I have done wrong? The only thing I could do was order a new rim - how could I prevent this from happening again?

The other wheel went fine.

Oh, and small tip - when seating the beads, be sure to do it in a dampened sound environment ;)
 

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Not familiar with the bontrager set up instructions , but that is a lot of pressure. I get scared going over 3 atm[45 psi] on other rims.I don't go over 40 psi with stan's rims using big tires. If need be, I use my hands to flex the tire on to the bead. Not as reassuring as a pop on to the bead. Beats a big bang though.
 

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Is it possible the rim was bent before you started? This would have made seating the tire difficult, and likely to blow out at higher pressures. Are the wheels brand new or have you ridden them in the past? You ever get a snake bit flat? If so, I'd imagine that you bent (maybed dented is a better word for what I'm trying to say) your rim prior to attempting the install.

Post up a pick of the bent rim.
 

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Discussion Starter · #6 ·
Thanks for quick replies.

justin: it could have been bent, but definitely not this much (will post pic tommorow - already 1 am in my time zone). I have ridden these wheels for give or take 350 km (220 miles), but i don't recall hitting hard any obstacle (have done some racing though). I also haven't had a flat or dented the rim.

mtnbiker72: my thoughts exactly, it would be pretty hard to claim any warranty, but since the rim is undamaged (apart from the heavy bending :) ), there may be a chance...

Could the tyre have any invisible damage after the blow? It seems OK, but you never know...
 

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futeno-san said:
Thanks for quick replies.

justin: it could have been bent, but definitely not this much (will post pic tommorow - already 1 am in my time zone). I have ridden these wheels for give or take 350 km (220 miles), but i don't recall hitting hard any obstacle (have done some racing though). I also haven't had a flat or dented the rim.

mtnbiker72: my thoughts exactly, it would be pretty hard to claim any warranty, but since the rim is undamaged (apart from the heavy bending :) ), there may be a chance...

Could the tyre have any invisible damage after the blow? It seems OK, but you never know...
I have had tires blow off and bend/damage the rim. It can be because of a deflective or damaged tire. I would check with your LBS and calmly and honestly relate what happened.

I would not be surprised if the tire is now damaged, even if you can not see it.
 

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Okay took me a while googling but 4 ATM is about 60 PSI........you need that much to seat the beads? I can usually seat mine with lots of soapy water and about 35 to 40 psi....
 
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