I bought a set of new Easton ea50s off eBay. Took the tubes and tires off my stock p2 wheels which I believe are r500 and vittoria rubino pro tires. Mounting them on the Easton’s has been difficult. It is almost as if the rim is too narrow and won’t fit the tire and tube where the valve stem is. Changeed tubes and got it to fit but when brought up to pressure the bead looks like it is buldging out in spots as if the bead will not hook. No problem with the diameter off the tires. The tires only have about 200 miles on them. The tire say do not use on non hooked rims…is that the prob or what? Any ideas or experiences with these rims? Do I need special tubes or tires? I rode these wheels twice, is it possible to have the tire slide off?
When it says do not mount on non hooked rim, that means do not mount the tire (a clincher) on a tubular rim. If you did try that it would be obvious that a clincher cannot be mounted on a tubular rim, but that’s not your problem. Can you post a pic? Only thing I can think of is that the tire has stretched with use and is now slightly too loose on the rim. Other thing could be the tube piched between the tire and rim, causing it to bulge. Try deflating the tire and check that the tube is properly inside the tire.
what size are the tires?
When it says do not mount on non hooked rim, that means do not mount the tire (a clincher) on a tubular rim. If you did try that it would be obvious that a clincher cannot be mounted on a tubular rim, but that’s not your problem. Can you post a pic? Only thing I can think of is that the tire has stretched with use and is now slightly too loose on the rim. Other thing could be the tube piched between the tire and rim, causing it to bulge. Try deflating the tire and check that the tube is properly inside the tire.
That’s what I thought, don’t use on tubular which is impossible. Tires are 700x23. I think you might be right about tire stretching. The internal rim of the old wheel said 15 (mm)? The eastons say 13. (622x13 whatever that means)
Still the part of the tube where the valve stem sits seems to be to large to fit in the rim with the tire. I inflated and deflated a few times and seemed to improve a little.
When it says do not mount on non hooked rim, that means do not mount the tire (a clincher) on a tubular rim… .
Yeah, don’t try to mount clinchers on a tubular rim but that warning is actually referring to vintage clincher rims that did not have hook beads. The earlier clincher rims circa the 1960s and 1970s often had straight walls and no hook bead to grab the tire. I’ve seen these on some early Peugots and Schwinns from that era. Those tires were also big gumwalls that weren’t pumped up to high pressures but they just relied on flat tire sidewalls pressed against flat rim sidewalls and a lot of material overlap to hold everything in place.
These days on 700c race worthy wheels it’s pretty unusual not to have a hook bead clincher rim, pretty much unheard of.
-Dave
When it says do not mount on non hooked rim, that means do not mount the tire (a clincher) on a tubular rim. If you did try that it would be obvious that a clincher cannot be mounted on a tubular rim, but that’s not your problem. Can you post a pic? Only thing I can think of is that the tire has stretched with use and is now slightly too loose on the rim. Other thing could be the tube piched between the tire and rim, causing it to bulge. Try deflating the tire and check that the tube is properly inside the tire.
That’s what I thought, don’t use on tubular which is impossible. Tires are 700x23. I think you might be right about tire stretching. The internal rim of the old wheel said 15 (mm)? The eastons say 13. (622x13 whatever that means)
Still the part of the tube where the valve stem sits seems to be to large to fit in the rim with the tire. I inflated and deflated a few times and seemed to improve a little.
If the bulge is at the valve, what you need to do is deflate the tire, then push the valve back into the rim/tire, while pushing the sidewall of the tire down on the rim to seat properly. The valve obviously won’t go all the way back in to the tire, but it is common for the fatter part of the tube around the valve to stop the bead on the tire getting under the hook on the rim properly. So deflate the tire and jiggle the tire/tube around to make sure it’s seated properly.
Sheldon Brown’s explanation may make more sense
http://sheldonbrown.com/flats.html
If the bulge is right at the valve, this usually indicates that the tire is sitting on the reinforcing patch at the base of the valve. Completely deflate the tire, and push the valve up into the tire with your thumb, while pressing the tire down around it, then pull the valve back down before inflating.
One more tip, put a tiny bit of air in the tube before mounting, as giving the tube some shape can help stop it getting pinched between the rim and tire.