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Help on Tire/Wheel size - Have I gone crazy??

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Help on Tire/Wheel size - Have I gone crazy??

Old 10-12-09, 02:27 PM
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Rixtory
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Help on Tire/Wheel size - Have I gone crazy??

Ok,
So I bought these new rims from Harris Cyclery for my old 86 Cilo -
700c" Sealed Hub/Sun M13II QR Wheelset 36 SPOKE
and put these tires on them a few months ago. Forte Kevlar 700x28.

The tires were really tough to get on and I thought it was kinda weird that they were so tight on teh circumference - I ended up breaking 2 nylon tire levers.
So I just took the rear tire off to true up my wheel and I ended up breaking another tire lever and the only way I could get the tire off was with a screwdriver which has scratched up my rim...

Do I have the wrong size tire? I have never encountered an issue like this and have changed tires or patched tubes probably 25 times in my life.
The rims say 622, and the tires say 622 (700 x 28). I had the same issue with the front tire as well and am hesitant to remove it and scratch up the rim.

Has anybody else confronted this issue? Are the Performance tires manufactured just too small?
Help please????
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Old 10-12-09, 02:54 PM
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Last year I mounted a high pressure 26" road tire onto a MTB rim, the wheel/tire sizing was catalog-numerical correct. I busted a so called unbreakable tire lever getting them on.

Sometimes the rims are at the plus end of the acceptable dimensional range while the tires are towards the smaller end of that range.

Probably no help at all except to say I understand what you're saying.
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Old 10-12-09, 02:54 PM
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To anylize or over-anylize tire specs. isn't very productive.. I've read this occuring a number of times here, it's a rim issue more than tire. Performance hasn't been mentioned.

I've had that problem with OLD Specialized (180 psi ones , unique) on rims that were known to NOT be problematic as were very old european or JPN. odd lipped rims could be. You made a good choice with those rims.

I've also found that tire changes that warrant the use of levers (as a must) also require a metal lever. I've had the S.D. thing happen so... you're not alone.
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Old 10-12-09, 03:00 PM
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I have one of these. It works great, though you have to handle it carefully while applying force.

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Old 10-12-09, 03:07 PM
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Once in a while that happens. Get some liquid dish detergent, apply patience, and avoid scratching your rim.

I have an '86 Cilo, too. Great bike.
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Old 10-19-09, 08:17 AM
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In the worst case, Ive found Park's steel tire levers to work great, and with care you can avoid scratching up your rims. And, as Robbie says, use some dishwashing detergent, and you might not even need the levers.
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Old 10-19-09, 08:42 AM
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Some combinations of rim/tire are just hard. Working carefully you can make do, but I have run into at least one combination that really was just not going to work at all.

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Old 10-19-09, 08:56 AM
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Leave them to heat in the sun for an hour before mounting, and use thinned dish soap, usually makes the best of a difficult situation.
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Old 10-19-09, 08:57 AM
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The 700c rims on my touring bike are labeled "SUN CR-18 26 x 1.5 559 ISO" or something like that, but they are clearly 700c rims. Evidently, errors in labeling can happen. If that's the case, you may have a mis-labeled 27" rim. More likely, you just have a bad rim-tire combination; a different tire may fit differently (i.e. better).
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Old 10-19-09, 09:02 AM
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I have one of these for extreme cases of tire mounting difficulty:
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Old 10-19-09, 09:20 AM
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Forte tires, at least in my experience, are notoriously difficult to mount. I have mounted them in 27, 700c and 26 slicks. They have always given me problems. Dish soap sounds like a good idea, although I have never used it. I have had pretty good luck using baby powder/talc to get the bead to seat on the rim.
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Old 10-19-09, 08:44 PM
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Originally Posted by yepyep View Post
Forte tires, at least in my experience, are notoriously difficult to mount.
A very likely explanation. I've got this rim on the back wheel of my old Masi (my other wheel has a GP4), and mounting tires is no problem at all.

When you mount a tire that is on the small side of spec onto a rim that is on the large side of spec, but all within tolerance, broken tire levers result.
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Old 10-20-09, 11:59 AM
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I used to just use my fingers to mount on Specialized Turbo tires back in the 80's and 90's, even the highest pressure narrowest versions of the R model, without any problems, I got so used to doing it that I could whip those tires on and off a rims real quick without any tube pinches. When i returned to biking this year, I was surprised when I had a real hard time mounting Vittoria Diamante Pros on my rims. I had to use levers again for the first time in many years. I was wondering if flexible tire bead design/tolerances changed over the years, but after doing a few other tire installations after that first time, it seems like It's getting easier to do. I think it all comes down to technique on how you position the beads and innertube when you mount them. I was surprised when I mounted my recently aquired Hutchinson 700Cx21 Atom tire recently, without the use of tire levers.....I think I'm back to form with installing tires on rims........my body on the other hand, is another story though.....

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