I've seen this before, but never had it on my car. Anyone have any insight as to what causes it? It's not rubbing anywhere on the car. You can see a faint line all the way around the tire in that area, almost like something is seperating or something?

These tires have 7 passes on them, all from one day at the track. No dyno time, no time sitting on the car. On the car on race morning and off the car that night. Not sure when it happened, we didn't notice it until we were unloading them from the car at the shop. It was dark out when we took them off the car at the track.

 

I have never seen this before, I have had a lot of dealings with m/t slicks in rwd applications cars that go in the low 1.20s in the 60' and never seen this. I think you got a bad set, it almost looks like the tread seperated from the cords/bands then possibly bubbled up and tore off while driving the car down the track. I would call them and send them these pics.

In for more info!!

 

if you go to a nhra race and look at the tires on afuel car and they usually look like that after one pass. It looks like seperation. It is usually not in one spot like that though. They are more spread out. I have some pics on my laptop from Vegas, but can't get Internet access on the road right now.

 

I sent pics to tech at MT, i'll update this if I hear back from them.

Chuck has had this happen to him a few times and he said that he thinks Ballard has as well. Brian, any insight?

 

Ive seen this twice...both cars were on the dyno though...

 

Ive seen that happen alot but only on the dyno. It happens when i do alot of runs back to back.

 

I've had it once, happened when the tires were grabbing like hell, then spun. i also recall seeing eggums tires look like that once or twice, bergenholtz i think also had this issue.

 

edit: nm, just saw the pictures.. (can't see them at work).. Not the same issue..

 

wow 7 passes, and other have dealt with it before. It has to be a bigger issue than we think either a material/design flaw issue.

has anyone seen it on any other brand

 

Can it have something to do with FWD cars running low-flat looking pressure? Also cars making lots of power with all the weight on the front tires?

 

the car is question seems to have an alignment issue with how the tire wear looks.

Not sure about the chunks missing, is it possible the car is scrubing the tire?

 

How wide of a rim vs the tire? My first guess would be too narrow of a rim with too little pressure while spinning the tires too hard. The chunks missing is an overheated tire thing. I've seen it on fuel cars. You can spin the tires so far down the track you need to think of this application more like a fuel car than anything else. Pro mods can't spin the tires as far down the track as an SFWD car.

My guess is the tire is riding on the sidewalls off the line and then stands up hard on the big end. The gap in the contact patch near the outer edge of the tire is what I'm basing this on. I was amazed how much the 12" wheels evened out the tire wear near the sidewalls on my car. That is with a 10.5" tire on mine.

Kevin

 

I've seen this happen on Joe's car before. It would look like blisters. I would agree with Kevin in that it could be caused from the rim being too narrow and not enough pressure.

 

i was thinking the same Toe issues to be exact. That's where Toe takes effect.

 

This is from my car. 10" wide rim with double beadlocks. 26x10" tire. The car doesn't spin the tire a ton, but it obviously does spin.

I think the tires pick up some 'abnomal' wear looks from having a spool. When turning with a spool it really drags the tire.

 

It'll be interesting to hear what the M/T techs have to say about that.

 

Could that be caused by doing a burnout on a poor surface? Lump of tar or something and the tyre has grabbed it?
Unlikely I know, but another option I guess...

 

that makes sense, almost creating a toe effect compared to a car that has toe issues driving straight (if that makes sense). But 7 runs? that's kinda fast. Have you had this issue on previous tslicks with the same setup? My guess is no which leads to a design flaw, or a bad set.

 

Was this on both sides?

 

Time for some M&H's???

 

how consistant are the chunks from the beadlock mounting point

 

Is it exactly what you're saying, that when turning it's dragging and tearing a "soft" hot tire? Dunno

 

Interested to hear the reasoning behind this, not to long ago I remember posting a thread in this forum about the same issue, but I think the tire actually split more while going down the track. No one had any clue why though, I wanna say it happen to Joe awhile back, gonna search for it but H-T search sucks

 

i had one do that in 4 passes, its like the outter layer of rubber just deterirates away. The inside layer is tough as nails so they still hold air.

 

This happens to top fuel dragsters on tracks are very tight Ive seen chunking of tires.