GRP tires speed limit?

[Hector_Fisher]

I've seen plenty of people are taking these up beyond 100mph. So is this just the standard packaging label they put on every bag for warranty purposes? Or did I just get the wrong set and now I'm limited to basically 70mph??

 

[jkflow]

Tires are all the same but 1-2 years ago they had warranty on tires. People would return their speed run tires that blew up.
Now they just advertise what will work for sure, rest is on you.

I doubt there is any tire rated above 100mph. Yes, some get lucky with GRP, plenty of stories on this forum, eventually followed by a 'my tire blew up' story.

 

[StephenSchandelmayer]

137 on grp for me. Multiple runs on the same set over 110 never had one let go and I never balanced them

 

[Garcbomber]

137 on grp for me. Multiple runs on the same set over 110 never had one let go and I never balanced them

The same model as the OP or what? km/h or mph?

 

[Hector_Fisher]

So I have a few potential options here: use as street bashing tires on my tekno SCT or attempt speed runs in the 90 to 100mph range on a 5 lb RC.

In terms of confidence: there is a chance the tires could blow up at 111 KPH. So i couldnt be 100% confident they'd survive beyond that. But in terms of likelihood, it's not very likely they would give out until 120+ MPH? Seem reasonable?

 

[StephenSchandelmayer]

The same model as the OP or what? km/h or mph?

MPH, that's what he was talking in so I was assuming that was a given. And yeah I was using the soft medium as well

 

[RuffRiki]

I’ve been up to 140 MPH with GRPs that I still have and plan to run again. I’ve seen guys I run with go up to 160 MPH with them.

 

[jkflow]

Really depends on temps and road condition.100MPH shouldn't be much of a risk unless you hit a little rock or something.
You can always set them up for a dry-run, spin them to the expected rpm and see how they hold up, i.e. do this on a bench with a single tire and a motor.

 

[Hector_Fisher]

Really depends on temps and road condition.100MPH shouldn't be much of a risk unless you hit a little rock or something.
You can always set them up for a dry-run, spin them to the expected rpm and see how they hold up, i.e. do this on a bench with a single tire and a motor.

I think you'd always be basing likelihood based off reasonably "ideal" conditions. Too many factors and circumstances to consider unplanned or unfortunate incidences. Even running below 70mph and hitting a rock, i don't think you'd be able to confidently say they'd stay together.

I have done bench spin tests at full RPM with a previous set I was running on this rig (85mm hoon golds). That's what I used as justification to run actual full speed passes on the road. I may yet do that for this set, just for additional confidence. Thanks for the input.

 

[Greengaunja]

Another factor would be weight of the vehicle. Tires are funny. I've had GRPs blow out below 50mph and had them do 129mph, so obviously manufacturing, materials snd assembly have a role it max speed limit too

 

[K-BASH]

153 with detta an 151 with typhon gt.the j code slicks work best for me.i reglue seams front an back
1:13in vid ya can hear something let go.probly broke bent but my glued seams held

 

[dk10438]

usually safe up to 120 mph. Beyond 120 it’s kind of hit or miss imo. Had a blowout last week at 140 mph and fortunately the damage was minimal and I reinforce with Bob smith.

You have been warned….