mises wrote:I'm starting to think it's high inflation pressure in a number of these cases. The above 120psi with a 25mm tire on a 340 rim (effectively more like 27mm) is very high - which negates all the benefits of higher volume tires too.
Any news here ?
To the question about "why run clinchers?" I guess it's because I did lots of reading on the pros and cons, and wasn't convinced to make the change- this was 1 1/2 years ago. These rims were discussed and bought as a WW item, and tubeless were heavier than a PR3 with a light tube - say 275g. At the time tubeless were well over 300g plus 25g or so of sealant. The difficulties of a repair on the road was also a factor.
Now that tubeless are getting lighter perhaps I'll reconsider. I'd still like to see more variety and lower prices.
How many drivers does a buggy have?
So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.
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MajorMantra wrote:Has there been any follow-up on this? Does anyone know if the Alpha 400 has any similar issues? And is this only with road tyres, as opposed to CX?
I'm pretty sure all the Stan's rims behave the same because they all have a similar bead retention design.
The "problem" is that the Stan's rims don't have a bead hook. There is a tiny ridge at the top edge of the rim, but Stan told me that wasn't really doing anything. The tire is kept on by how tight it is. On a normal rim this is *not* the case... even if the tire is loose, lateral pressure against the bead hook keeps it in place. The design of the Stan's rims have some virtues... like making the tire larger and rounder, and the rims are light too... but the tires are not kept on as well as with other rims.
In my case and several others I know of, it was definitely not high pressure. Unless 23mm tires at 90-100 psi is high. In my case the tires were not very tight. Kevlar beads stretch, so even if they are tight going on, they can get loose later.
My safety is worth more than any weight saved or cost!!!
Standard clinchers use a kevlar bead that is too loose for high pressure on these rims. These rims are designed to be used with the modern carbon bead (hard to mount) tubeless tires.
Maybe we can say that standard kevlar bead clinchers blow off? A chart to show some data on these with different tire setups would be interesting.
tinozee wrote:I feel like a parrot but.. Stan's rims are designed for tubeless tires, and with tubeless tires installed properly they don't blow off.
I think people have commented in this thread that tubless tyres do blow off
Disclosure: I'm sponsored by Velocite, but I do give my honest opinion about them (I'm endorsed to race their bikes, not say nice things about them)
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