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Author Topic: American Racer Tire Coming Apart Inside?  (Read 2127 times)
VMS Motorsports
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« on: October 31, 2011, 02:30:47 PM »

Anyone dismount their American Racers or have to change one this year due to failure?
Pulled my right rear off after 18 shows, and the inner cords are all loose and coming apart. Was not like that after 12 shows when I had it off previously.
They say that they are not directional...but could this have anything to do with switching rotation direction?
Will try to post pics when I get a chance...
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JIM BUCHER
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« Reply #1 on: October 31, 2011, 04:22:14 PM »

Here it is...
Havent looked at the others yet


* 002.JPG (124.1 KB, 640x480 - viewed 103 times.)
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JIM BUCHER
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« Reply #2 on: October 31, 2011, 04:30:10 PM »

Thats wierd.  It didn't happen to rotate on the rim did it, maybe twisted the cords?
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ethan54
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« Reply #3 on: October 31, 2011, 05:01:21 PM »

I have about 25 nights on my RR, maybe I'll pull it off tomorrow and see what it looks like
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Ethan Ross
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« Reply #4 on: October 31, 2011, 06:07:49 PM »

Thats wierd.  It didn't happen to rotate on the rim did it, maybe twisted the cords?

It was on the beadlock, and I could not get it off, it was stuck on reeeeeeaaaal good, so I dont think it spun, but anything is a possibility.
 I switched the tire around every 4 nights or so to keep the sharp edge on the front, so thats why I know it was OK after 12 nights.
Hopefully it was just a fluke and not planned obsolesence, though I suppose the midget guys who run these dont keep them for much longer than a night or 2
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JIM BUCHER
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« Reply #5 on: November 01, 2011, 06:26:25 AM »

Too low of airpressure which put too much stress on the sidewall?
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www.JeffSteenbergen.com

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« Reply #6 on: November 01, 2011, 06:51:18 AM »

I usually ran 8-9 lbs in the RR with the exception of 6 lbs on a very wet night in Sun Prairie... same pressure as the BFG's
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JIM BUCHER
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« Reply #7 on: November 01, 2011, 10:49:28 AM »

Don't the tire's have camber built into them, which would make them directional?  Wondering if it is from switching them back and forth like you said.  Also, with the beadlock, it may allow the inside of the tire to twist a little on the wheel while the bead lock side not moving which I guess could stress the tire even more.  You might want to run it past the American Racer folks and see what they think.     
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Legends57x
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« Reply #8 on: November 01, 2011, 12:23:45 PM »

Jim,
I was thinking about this one last night too and agree with what Jeff said.  Keep in mind that the old BFG tires were a radial tire originally designed for street use with much stiffer sidewalls, while the American Racer is a true race tire with much, much softer side walls.  By running them that low on tire pressure and switching direction of rotation back and forth, you may initiated this failure. I agree with last gentlemen also that you may want to contact American Racer directly and discuss and find out the minimum tire pressure for this tire.  Sure glad you found this condition now rather than have this tire completely disintegrate while racing, which probably would have ende up bad.  Grin

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Mark Ritger
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« Reply #9 on: November 01, 2011, 05:11:37 PM »

Hmmm...hope Brandon and his 3lbs in the right rear is reading this...
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JIM BUCHER
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« Reply #10 on: November 01, 2011, 06:25:49 PM »

Yea I run mine lower than most people. Not 3lbs jim Grin. I didnt have any issues but also didnt flip the tire every 4 races
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« Reply #11 on: November 01, 2011, 07:23:42 PM »

We all can't afford to buy a new right rear every other race Mr. Moneybags  Grin
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JIM BUCHER
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« Reply #12 on: November 01, 2011, 08:23:47 PM »

I switched the RR once and thats cause the side wall got cut haha
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JC38
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« Reply #13 on: November 02, 2011, 09:09:54 AM »

i have turned mine around and have not noticed anything wrong. i run 10 or 11 in  my right rear.
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« Reply #14 on: November 03, 2011, 07:35:17 AM »

I dont think its necisarry to flip the tires that often Jim, if you are running correct air pressures i saw very little wear.  I agree with Scott that you should contact AR and see what they think.  Once you get on the URC setup program you wont have to worry about those issues.
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