Use this tire?
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Use this tire?
Posting here because this mostly applies to tires I use on C&V MTBs. I often run across tires where this happens with the sidewall:
It's fine on the inside. Not a result of wear, or abrasion with an errant brake block, or the like. The tire's not dry rotted, or weather checked, no cracks inside or out. Generally still pretty supple. It's just that the sidewall sometimes shows its threads, on the outside only. Couldn't find another thread (no pun intended) with a similar pic. Keep or recycle?
It's fine on the inside. Not a result of wear, or abrasion with an errant brake block, or the like. The tire's not dry rotted, or weather checked, no cracks inside or out. Generally still pretty supple. It's just that the sidewall sometimes shows its threads, on the outside only. Couldn't find another thread (no pun intended) with a similar pic. Keep or recycle?
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i have some conti speedrides for mostly gravel use that had developed to that state over time. it's not been a problem so far.
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I've had tires that looked sort of like that new. But they weren't very good tires. Just cheepos.
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I've used one pretty recently like that. It seemed fine for awhile, then the wire bead worked it's way out of the rubber. This resulted in a flat, obviously, but the worst part was, it refused to stay on the rim, so I could walk it into a town. 🙁 That's probably not too likely to happen, for most folks, just oddballs like me. 😁😉
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I've used one pretty recently like that. It seemed fine for awhile, then the wire bead worked it's way out of the rubber. This resulted in a flat, obviously, but the worst part was, it refused to stay on the rim, so I could walk it into a town. 🙁 That's probably not too likely to happen, for most folks, just oddballs like me. 😁😉
Posting here because this mostly applies to tires I use on C&V MTBs. I often run across tires where this happens with the sidewall:
It's fine on the inside. Not a result of wear, or abrasion with an errant brake block, or the like. The tire's not dry rotted, or weather checked, no cracks inside or out. Generally still pretty supple. It's just that the sidewall sometimes shows its threads, on the outside only. Couldn't find another thread (no pun intended) with a similar pic. Keep or recycle?
It's fine on the inside. Not a result of wear, or abrasion with an errant brake block, or the like. The tire's not dry rotted, or weather checked, no cracks inside or out. Generally still pretty supple. It's just that the sidewall sometimes shows its threads, on the outside only. Couldn't find another thread (no pun intended) with a similar pic. Keep or recycle?
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Yeah, ditto the Conti SpeedRides -- a few Irish pennants along the sidewall near the bead where it contacts the rim hooks. No signs of abrasion or deteriorating. I've ridden those tires for thousands of miles and nearly 3 years, no problems.
But I just discarded a Michelin Krylion Carbon 700x20 from an older aero TT bike because the same area of the sidewall near the bead shows signs of deteriorating. Hadn't yet extended to the inner wall but it's not worth risking.
I inspect my tires at least once a week, often before every ride, to be sure the brake pads haven't slipped and abraded the tire. That's the most common reason for sidewall damage -- pad alignment. Even if the pad hasn't slipped, sometimes I'll see pads that weren't aligned correctly to begin with. Folks will eyeball the pads without clamping them shut against the rim, using a flashlight and reading glasses, etc., to be sure they're getting a good look. It can be tricky with cantilever brakes too.
But I just discarded a Michelin Krylion Carbon 700x20 from an older aero TT bike because the same area of the sidewall near the bead shows signs of deteriorating. Hadn't yet extended to the inner wall but it's not worth risking.
I inspect my tires at least once a week, often before every ride, to be sure the brake pads haven't slipped and abraded the tire. That's the most common reason for sidewall damage -- pad alignment. Even if the pad hasn't slipped, sometimes I'll see pads that weren't aligned correctly to begin with. Folks will eyeball the pads without clamping them shut against the rim, using a flashlight and reading glasses, etc., to be sure they're getting a good look. It can be tricky with cantilever brakes too.
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I have also had this Schwalbe malfunction, on a nearly new tire. Talked to a Schwalbe rep, who told me to send Schwalbe customer service a photo, which I did and they sent me a new tire and instructed me to dispose of the old one. Nothing like telling me to do something for making me do the opposite, so naturally I tried to cut the wire off and put some gaffer's tape over the hole where it exited and reuse the tire. It lasted about a week before it extruded wire into the tube and caused another flat.
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And I always assumed that those diagonal cord marks were caused by me putting down massive power when accelerating or climbing, causing the tires to crinkle like they do on drag racing cars when accelerating from a stop.
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^^^^ That's it; it's all the burnouts I do coming home from work.....
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Last edited by rumrunn6; 09-24-19 at 07:05 AM.
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Bead is okay, nothing is shifting or separating. It's just the section of the sidewall where the lettering is, showing some of the threads. Fah, maybe I'll just mount 'em and ride easy for a while; the bike the tire is going on is going to need a few shakedown rides anyway.
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Low Pressure?
Jan Heine stated too low pressure will cause sidewall threads to break; just wondering...
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I don't see any broken threads. Just the gradual loss of sidewall latex that happens to all tires of this type.
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I recently had a set of (probably OEM ) tires on a mid eighties bike (that I kinda like to ride) that we're getting more than a little "threadbare"! The gum wall had long since dried, cracked and basically fell off the side of the tire. The tires held pressure (90 psi) and seemed to be holding up OK. Recently, I was about 15 miles from home when I stopped to take a short break, have a snack and some water. While off the bike, I noticed a couple of "bulges" on both the front and rear tire. With the side wall gone I could see the threads of the outer ply were breaking down . First thing that I thought was " the wife is going to be PO'd if she has to come and get me (again ). Second thing was, I'm hoping that the front tire doesn't blow while flying down a hill! I made it home OK but decided that is was time for a new set of tires for my old school favorite. After removing the dying but not yet dead tires, I inspected them closer only to find that I was down to one thread layer and could actually see the top of my finger through the ply! I should have taken a pic but sadly didn't. I will never let a fire get that bad again!!
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#19
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Broken Threads
https://janheine.wordpress.com/2016/...tire-pressure/. I guess we can agree to disagree!
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I would ride on that tire (especially if period-correct for the bike) but make a point of keeping an eye on it.
I had a Bontrager road tire that had been on my bike since 2009 or so hanging in my garage - looked fine, after my first ride in about 10 years a few weeks ago, noticed when I got home that about 2" of tread was gone from the rear tire. It was a grey strip aside the black center tread that had dried out and crumbled when the tire flexed. Rode it for about another 50 miles until new tires arrived with no issue (the tire was a belted Hardcase model).
On the very first ride with the new tires (Continentals) a tiny piece of gravel I didn't see cut the sidewalk of the front tire. I didn't ride that one out, waited for the replacement to arrive.
I had a Bontrager road tire that had been on my bike since 2009 or so hanging in my garage - looked fine, after my first ride in about 10 years a few weeks ago, noticed when I got home that about 2" of tread was gone from the rear tire. It was a grey strip aside the black center tread that had dried out and crumbled when the tire flexed. Rode it for about another 50 miles until new tires arrived with no issue (the tire was a belted Hardcase model).
On the very first ride with the new tires (Continentals) a tiny piece of gravel I didn't see cut the sidewalk of the front tire. I didn't ride that one out, waited for the replacement to arrive.
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Sorry, to me the picture posted by OP looks like the beginnings of the pictured tire in Heine's article.
https://janheine.wordpress.com/2016/...tire-pressure/. I guess we can agree to disagree!
https://janheine.wordpress.com/2016/...tire-pressure/. I guess we can agree to disagree!
CX Magazine noted sidewall leakage from the get-go, so it wasn't going to take much sidewall flexing to open up more spots for sealant to leak out. Especially at the low pressures they were running.
Given the way the fabric is laid up, it's pretty easy to see which paths leaked sealant will take, given the chance.
I expect to see frayed ends flapping in the breeze when threads have truly broken. That's the kind of thing that should concern you and make you consider replacing the tire. Not what we've seen so far in this thread. I've had a handful of skinwall tires lose their sidewall latex and look worse than the OP's picture, but they hung on just fine until they wore out or succumbed to an unrelated injury.
That said, running really low pressures accelerates sidewall wear, so the pattern of the OP's wear indicates he should probably be running a bit more pressure.
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Hmm, I wasn't aware of this, thanks for that info. 🙂 I tend to run low pressured, thinking that gives me a safety margin, from over-inflating. 🤔
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I've run Compass / Rene Herse Bon Jon Pass Extralights for the past 3.5 years, but I use them with a tube and running on relatively narrow Mavic MA-3 rims. Because I'm 210 pounds, at first I ran them at 55 front/60 rear because I couldn't get myself to run them lower even though many suggested lower would be fine. I trained on my first set for Eroica California 2017 and continued to ride it the following year. I got one flat from a tread cut but still had plenty of tread left. I bought new tires in Feb. 2018 and ran those in Eroica California 2018 with no ill effects. In Summer 2018, I dropped the pressures to 50 front/55 rear with little change in ride or wear. I rode about 1500 miles on them and wore the rears down about 1/2 way, front only about 1/4. I purchased a new tire for the rear Feb. 2019 and kept the same front tire, and ran those on the 75 mile Santa Lucia route for Eroica California 2019 with absolutely no problems. I have used sealant per my LBS suggestion, I think Stan's primarily.
Since Eroica, this year I've dropped the pressures to 45 front and 50 rear. Tire feels a touch softer, my fellow riders think my tire is going flat, and they just keep running. I try hard to avoid hard bumps and lift/glide over rough patches when able. Personally, I've had zero problems with the sidewalls aside from them getting dirty. It was difficult to get them mounted on narrower 700C rims but using thin Stan's plastic tape which is slippery helped the beads to move into place. Once there, they pretty much stay there. As for wear, the front tire is still showing tread, and the rear is doing fine. The 3-4 tires I had used in the past are still good enough to put on other bikes, assuming clearance is ok, which I will do with some builds over the winter.
I get the tubless use that Cyclocross mag was doing. Odd though they never did a follow up after the August 2016 update. Plus there are other Compass / Rene Herse knobby tires for CX use now.
Since Eroica, this year I've dropped the pressures to 45 front and 50 rear. Tire feels a touch softer, my fellow riders think my tire is going flat, and they just keep running. I try hard to avoid hard bumps and lift/glide over rough patches when able. Personally, I've had zero problems with the sidewalls aside from them getting dirty. It was difficult to get them mounted on narrower 700C rims but using thin Stan's plastic tape which is slippery helped the beads to move into place. Once there, they pretty much stay there. As for wear, the front tire is still showing tread, and the rear is doing fine. The 3-4 tires I had used in the past are still good enough to put on other bikes, assuming clearance is ok, which I will do with some builds over the winter.
I get the tubless use that Cyclocross mag was doing. Odd though they never did a follow up after the August 2016 update. Plus there are other Compass / Rene Herse knobby tires for CX use now.
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