Tire won't fit perfectly
10-15-10, 04:26 AM
#1
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Tire won't fit perfectly
So I've put my tires on my new Fulcrum Racing 7's. Now I've noticed that when I ride I feel small bumps. After checking my tires I noticed the same issue as I used to have on my Mavic CXP22's.
At some point at the rim the tire sits slightly deeper into the rim than it should. On my CXP's I was able to push a bit against the walls of my tire, and it would sit perfectly. Now, after pushing tire walls for about an hour, my thumbs hurt and I still have the same problem...
Anyone have a clue?
At some point at the rim the tire sits slightly deeper into the rim than it should. On my CXP's I was able to push a bit against the walls of my tire, and it would sit perfectly. Now, after pushing tire walls for about an hour, my thumbs hurt and I still have the same problem...
Anyone have a clue?
10-15-10, 06:01 AM
#2
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Are you sure the rim tape is the right size for the wheels? For example, on aluminum Zipps you can't use cloth tape, the tire wont' seat. You use a really thin tape (Zipp makes it along with other companies) and then the tire will seat. I am going to guess that you are using cloth rim tape.
Or...I am assuming that you put the tube and tire on, slightly inflate, recheck and adjust if needed, then finish.
Or...I am assuming that you put the tube and tire on, slightly inflate, recheck and adjust if needed, then finish.
10-15-10, 06:05 AM
#3
Lost
couple suggestions - first, use a thinner tube, make sure its the correct size for the tire you're using and not too heavy weight, second is the rim strip issue mentioned above, also, make sure its properly centered on the rim. third, a rag wetted with soapy water run along the tire bead right before installing goes a long way to seating frustrating tires. sometimes, a tight fitting tire will just have too much friction to find its perfect seating without a little lubricant.
what tires?
what tires?
10-15-10, 06:48 AM
#4
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Thread Starter
The rim tape came with the wheels and was pre-fit by Fulcrum themselves.
I'm using a Vittoria Rubino Pro at the back, and a Continental Ultra Sport at the front.
Tubes are Schwalbe 700C tubes, compatible with 23-622 ETRTO tires (700x23C or 28"x7/8). I've been using these all the time and they always fit without a problem.
I'm using a Vittoria Rubino Pro at the back, and a Continental Ultra Sport at the front.
Tubes are Schwalbe 700C tubes, compatible with 23-622 ETRTO tires (700x23C or 28"x7/8). I've been using these all the time and they always fit without a problem.
10-15-10, 07:31 AM
#5
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Try inflating the tires just a little. Then press the tire with your thumbs so that it catches the baed all around and then inflat fully.
10-15-10, 09:32 AM
#6
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10-15-10, 10:00 AM
#7
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It's not likely you'd get two bad tires, but bad ones do occasionally come through. I've had three or four in 40 years. If the soap-and-water lube somebody mentioned above doesn't help, try mounting the tires on other rims (either swap them on your bike or use a spare or borrowed wheel) to isolate the problem.
I never did figure out the issue, but one time I had a Panaracer that wouldn't stay on my rear wheel. Same model rim and tire on the front worked fine. On a whim, after the rear blew off for the third time, I swapped the tires front to rear. No more problems. I'm pretty sure it wasn't operator error, because I've surely mounted a couple of hundred tires over the years.
I never did figure out the issue, but one time I had a Panaracer that wouldn't stay on my rear wheel. Same model rim and tire on the front worked fine. On a whim, after the rear blew off for the third time, I swapped the tires front to rear. No more problems. I'm pretty sure it wasn't operator error, because I've surely mounted a couple of hundred tires over the years.
10-15-10, 10:24 AM
#8
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Thread Starter
It's not likely you'd get two bad tires, but bad ones do occasionally come through. I've had three or four in 40 years. If the soap-and-water lube somebody mentioned above doesn't help, try mounting the tires on other rims (either swap them on your bike or use a spare or borrowed wheel) to isolate the problem.
I never did figure out the issue, but one time I had a Panaracer that wouldn't stay on my rear wheel. Same model rim and tire on the front worked fine. On a whim, after the rear blew off for the third time, I swapped the tires front to rear. No more problems. I'm pretty sure it wasn't operator error, because I've surely mounted a couple of hundred tires over the years.
I never did figure out the issue, but one time I had a Panaracer that wouldn't stay on my rear wheel. Same model rim and tire on the front worked fine. On a whim, after the rear blew off for the third time, I swapped the tires front to rear. No more problems. I'm pretty sure it wasn't operator error, because I've surely mounted a couple of hundred tires over the years.
Still think it's a strange situation...
I'll ride it to work tomorrow, and get the tires off (I'm alone at the office so the boss won't notice
). I'll give the rim a soap job and see if the tires pop into place then.
10-15-10, 11:21 AM
#10
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10-15-10, 11:37 AM
#11
Uber Goober
Make sure the tube isn't pinched between the tire and the rim.
On my Worksman rims (26x2.125), there's some slop between the rim and the bead. If you just slap everything together, it'll hold up alright, but the tire will be a smidgen offcenter. When you first assemble it, though, you can shift the tire around and get it centered and then inflate. This assumes the tire is not standing up. I don't know if that would help (or even be possible) in your case, though.
On my Worksman rims (26x2.125), there's some slop between the rim and the bead. If you just slap everything together, it'll hold up alright, but the tire will be a smidgen offcenter. When you first assemble it, though, you can shift the tire around and get it centered and then inflate. This assumes the tire is not standing up. I don't know if that would help (or even be possible) in your case, though.
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10-18-10, 01:36 PM
#12
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Thread Starter
Oh wow...
I just had some time to work at the front wheel. So I deflated the tube, soaped up the space between the rim and the tire, inflated it up to 8 bar and I could actually hear the tire pop into place.
*pop*
Had a look with the wheel attached to the bike, and it's as good as it will get. Looks awesome. Should ride awesome as well tomorrow.
Will work at the rear wheel tomorrow morning when I find some time, or otherwise I will ride it into the shower at work and do the job there when everybody's gone home
Thanks so much for the advice guys!
I just had some time to work at the front wheel. So I deflated the tube, soaped up the space between the rim and the tire, inflated it up to 8 bar and I could actually hear the tire pop into place.
*pop*
Had a look with the wheel attached to the bike, and it's as good as it will get. Looks awesome. Should ride awesome as well tomorrow.
Will work at the rear wheel tomorrow morning when I find some time, or otherwise I will ride it into the shower at work and do the job there when everybody's gone home
Thanks so much for the advice guys!
