I actually replaced it, just to be on the safe side. But what do you think?

Replace

You could put a tire boot on it and it should be fine for quite some time.

Park Tool TB-2 Emergency Tire Boot

sucks but it's prolly done for. I have had success using a tire like that, sealed with some shoe goo, and with an internal boot, as a trainer tire for indoor riding, but I wouldn't expect it to last.

Got a similar cut on one of mine awhile back, I just filled it with some Shoe Goo and used it for another year or so.

Return!

Gonner

I tried that. I got about 1000 miles and the boot wore through the tire. I've also had grit wear through the boot.

It depends on your needs. If you want to experiment, then have at it.

If you need 100% dependability, then replace.

How are the threads? Bulging tube?
I've heard the suggestion of a glue-on radial tire patch. Perhaps a patch + filler (shoe-goo, or something else?)

If you want to continue using it, put it on your front wheel.

Thanks guys. I have learned something from this thread

No. The best tire, the one least likely to blow out, should always go on the front. You're more likely to crash if you have a blowout on the front tire than on the back tire.

When I get a slash like that I try it out, but if I start getting punctures through the slash I chuck it.

Fair enough, I was just thinking of how one could reduce the chances of a blow out, not the effect of one.

I'd boot it with a folded dollar bill, to keep the tube from popping through if the cut enlarges. Then pump it up and see if it's bulged at all in the morning. No bulging -- go ride it, just around town the first ride. I used a cut down Park Tool boot as a permanent fix, and it cut or wore through my inner tube after a half dozen rides. (Park says their boots are for temporary fix only.)

Most cuts that big will bulge, but it depends on how much of the casing threads have been cut.

Shoe Goo has helped to fill a cut, but I normally don't have any around. I've tried crazy glue, but that pops off after one ride.

Two inch long rim strip on the inside and ShoeGoo on the outside and it will last with no problem.

Cyanoacrylate, man. I've run tires with bigger cuts than that for hundreds and hundreds of miles. Let the air out, fill the cut with glue, after it hardens, air it back up. I had a cut double that size on a tubeless tire, and it lasted another 600 miles.

I was thinking a Tuffy tire liner would also solve this issue.

Yeah, I'm not seeing the issue here. If the tube isn't bulging into the cut, then absolutely ride. If it's bulging a little (ie you can clearly see exposed tube), then perform the boot & superglue option. The only cut worthy of replacing a tire is something where multiple cords are cut, the tire is just way too compromised and any tube would explode immediately unless booted.

This tire may be at the beginning of the end, or it may not.

IMO - it's not a safety issue because any rider should he able to handle a blowout should one occur at any time. It's not hard, and blowouts aren't at all rare, so if they were somehow dangerous, we'd be regaled with "I survived a blowout" stories every day.

The real issue is convenience, and whether you can save the tire with a boot on the inside. That depends on the extent of cuts in the fabric. If it were mine, I'd probably open it, and put a 2" square of carpet or duck tape on it on the bias so the plies line up, as a just in case. Then I'd ride the tire until it begins to spread near the cut, or wears out from other causes, whichever comes first.

Good grief, you'd rather have a flat front than a flat rear? Not me!

Honestly, I'd ride that. It looks like it's just in the rubber, not the threads. I doubt it's any kind of a danger. Probably last quite a long time.

Glue a thick tire patch on the inside and try to plug the hole.

I've never had a flat tyre whilst at high speed.

All my flats have been either whilst going slow or coming back to where I had parked my bike and noticing it was flat.

Having said all that, my suggestion was about minimising the chances of a flat tyre, not the worst possible outcome that could happen.

I have had a front go flat at speed. Two years later I still have the scars and the bill for the bicycle parts to put the bike back together to prove it.

I've had rears go flat many times at speed. It has never caused me any grief at all, just pull over and drop in a new tube.

Given my experience, I would NEVER put a tire that was at all compromised on the front. I'll put almost anything that will still hold air on the back.

I think that tire is fixable, no problem. Use rubber cement or some other adhesive to put a permanent boot on it. Even with plain 'ole duck tape I bet it would last a very long time.

I have a slightly smaller blemish on my tire right now. I dug a piece of glass out of it over the weekend. The "cut" amounts to about a 1/16 diameter hole in the rubber, but it did not penetrate the Kevlar. Nonetheless, I will be swapping out that tire this week. I hope to pick up the replacement tonight.