Does anybody have a specific name for the abrasion that occurs on the inside of the left chainstay when the tire rubs against it (usually when improperly secured wheel is torqued out of horizontal dropouts under pedaling load)?

Perhaps more importantly: does this mishap ever cause significant damage to the frame?

Thanks, I learn a lot on this forum.

As far as I know you might as well coin your own term. More important, better figure out how to stop it as it's kind of dangerous.

I think the term Tire Rub is used in racing (VErY TECHNICAL . I doubt that rubber will do appreciable wear on a steel frame other than mess up the paint, which can lead to corrosion which WILL damage the frame. It WILL quickly wear the tire and cause it to fail. CF may be a different matter with wear and the friction heat...NOT a problem for C&V! ;-)

Tire Rub. This just happened to me the other day a couple times. Not fun.

Then there is ANGRY tire rub, when your are riding just fine, stop at a stop sign, go to start and put a bunch of touque (out of the saddle) on the drive train and it shifts the wheel stopping DEAD, and nearly sends you over the bars...YUP!!!! Dangerous! Fix it! Simple case of QR just not tight enough.

That is precisely what happened to me, almost went down. BUT the qr was down as tight as it could go. The problem was grease on the inside of the dropout and on the axle nut where they meet. Got that cleaned off and hasn't slipped again.

Having the "sharp" side or toothed side of the lock nut toward the frame is important too. If one has changed spacing on the axle....too much axle showing at the dropout will prevent good tight locking, and may require a spacer to fix.

"Tire rub." That's elegant, I like it.

I ask because I noticed some abrasion and surface rust due to tire rub on the otherwise practically flawless 89 Schwinn Circuit I picked up yesterday and I'm trying not to let it kill the new bike buzz.

There is another cause for this particular problem if your riding buddies are practical jokers. Usual warning signs are one buddy who engages you in animated conversation at the stop light and another buddy who is somewhere out of your vision behind you and to the left.
Brent

You must ride with a ROUGH Crowd! :-) I think I'd take up riding alone with "Friends" like that! ;-)

I can't tell you what I called it when it happened to me twice in a single timed 100k in July, without being banned that is...

Wet conditions and rain filled potholes. My next bike will have vert drops. At least then if the wheel comes loose I either won't notice or probably won't be around to tell about it.

I have seen some pretty extensive abrasion to steel MTBs from the tire, I believe it's the dirt/dust silica on the tire surface which actually does the cutting. On carbon, my LBS here in Southern AZ has a picture of cuts on stays from what they say is (and it looks like it) tire nipples striking the frame repeatedly, to my way of thinking not the rubber but material on the nipple doing the damage.

Though I have no pictures to verify the statement, I have seen at least one non-drive chain stay worn through on the inside. On many occassions, I have seen steel worn away but not completely through.

Long term...any repeated abrasion can do considerable damage. A chain rubbing on a chainstay or derailleur will saw through metal somewhat effectively! Tires take longer, but they will do damage...silica sand IS a HARSH abrasive and will cut!!!!

Indeed, don't count on the rubber not damaging the steel. I've worked on cars a lot, and when people lower their suspensions and use too wide tires, the wheel arches can get very much eaten. Obviously, we're talking about very different rotational speeds on a bicycle, but the problem is real in long term use.

Good news is tou will easily see if any metal has been etched away. And on a bicycle, it would take a long rubbing time before the chain stay actually got damaged.

That's WICKED tire rub here in New England.

Rubber versus steel: guess which one wins there.

I have an old Jamis frame in my garage with a hole in the chain stay from chainsuck.

How often do you all notice tire rub damage on C&V frames? Is it a dealbreaker for you? I've found it on both the bikes I've picked up since getting interested in this game.

How do you assess severity when the abrasion is down to bare steel, but doesn't appear to be "deep"? There's not far to go through a 0.7mm tube wall...

These are "Buddies"? Wow. Wouldn't be my buddies for long.