Continental Grand Prix 4000S II puncture

[Andywinds]

Hi, I had a puncture yesterday, and while out in the rain I rushed to fit new inner tube. By the time i got home the tyre was flat again. Upon closer inspection a sharp tiny piece of stone had embedded itself into the rubber and hit the tube. I thought these tyres were supposed to add an extra layer of protection? Because of this should I replace the tyre, it's a shame because they have plenty of life left in it. I'm not sure if it makes a difference but I have been running at 110psi?

 

[stumpy66]

I wouldn't replace the tyre yet, I normally just pop a drop of superglue into the cut when the tyre is still inflated then deflate it and leave it a while to let the glue set

 

[S-Express]

I thought these tyres were supposed to add an extra layer of protection?

Maybe the extra layer of protection wasn't enough? Difficult to comment on the tyre without seeing a pic. 110psi may or may not be the right pressure for you. It's mostly dependent on your weight, the tyre's width/volume and the type of roads you typically ride on.

 

[Andywinds]

Maybe the extra layer of protection wasn't enough? Difficult to comment on the tyre without seeing a pic. 110psi may or may not be the right pressure for you. It's mostly dependent on your weight, the tyre's width/volume and the type of roads you typically ride on.

I appreciate that. I'm 15.5 stone. The hole is very small, and the object looked like a tiny piece of stone/glass, it was raining so I did spend that long looking at it. When it comes to replace I might try the 'Continental Gator Hardshell'.

 

[Andywinds]

I wouldn't replace the tyre yet, I normally just pop a drop of superglue into the cut when the tyre is still inflated then deflate it and leave it a while to let the glue set

I'll give this a go thanks.

 

[graham bowers]

I appreciate that. I'm 15.5 stone. The hole is very small, and the object looked like a tiny piece of stone/glass, it was raining so I did spend that long looking at it. When it comes to replace I might try the 'Continental Gator Hardshell'.

I'm on Hardshells and have had similar p*nctures to the one you describe from glass and flint. I took one tyre out of use as a 4mm wide cut went all the way through, not on the wall either - Middlesbrough glass!

 

[roadrash]

show us a photo of the hole in the tyre ,

 

[graham bowers]

show us a photo of the hole in the tyre ,

2 for the price of 1

 

[MacB]

It may not have happened all at once, little bits can get embedded and then gradually work their way through. When I commuted I checked my tyres weekly and used a small penknife to remove lots of bits and pieces. This was on M+ tyres, on finer rubber maybe this should be done after each ride?

 

[Andywinds]

2 for the price of 1 View attachment 363666 View attachment 363667

Yes, it looked like this this but small. I've since glued the hole. I will make sure I check them before each ride. Thanks all.

 

[graham bowers]

Not sure which message you are replying to MacB but I agree the damage to my tyre was not a 1 off event. I noticed the cut on the outside of the tyre but there was no embedded object. I monitored it over the course of a couple of months and whilst the cut on the outside didn't get any bigger, it initially did not go all the way through. I made that discovery when I had the tyre off for another reason.

 

[MacB]

Not sure which message you are replying to MacB but I agree the damage to my tyre was not a 1 off event. I noticed the cut on the outside of the tyre but there was no embedded object. I monitored it over the course of a couple of months and whilst the cut on the outside didn't get any bigger, it initially did not go all the way through. I made that discovery when I had the tyre off for another reason.

It was really just a general comment on remembering to check tyres for bits and cuts.

 

[Levo-Lon]

It was really just a general comment on remembering to check tyres for bits and cuts.

This rule applies to all tyres ..bikes cars lorries..
A inbedded sharp will make its way through if given the time.
Its a pain checking cars but a cycle is very easy..and takes all of a minute to check both.

 

[Cronorider]

Hi, I had a puncture yesterday, and while out in the rain I rushed to fit new inner tube. By the time i got home the tyre was flat again. Upon closer inspection a sharp tiny piece of stone had embedded itself into the rubber and hit the tube. I thought these tyres were supposed to add an extra layer of protection? Because of this should I replace the tyre, it's a shame because they have plenty of life left in it. I'm not sure if it makes a difference but I have been running at 110psi?

I use the same tires, and while they may have an 'extra layer of protection', they are still a very light, performance oriented tire that are great for speed, but need to be ridden on clean roads. Any time I notice glass on the road, I stop, get off, and run my gloved hand around the tire checking for any glass bits that may have embedded.

 

[Andywinds]

The road I use are not great, loads of pot holes and lose material. I will take more care now, and I'll be checking the condition more often. I also do MTB'ing, and a lot of us will grab the bikes and go. Usually maintenance happens when there is a problem.