Author Topic: Mickey Thompson ET Streets  (Read 77 times)

Offline cudabob496

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Mickey Thompson ET Streets
« on: January 07, 2019 - 02:37:18 pm »
My ET Streets are 15 yrs old. MT tech guy says we should replace tires
after 6 years, because the rubber ages and the tires woun't have as good
of traction.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"




Offline 70chall440

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Re: Mickey Thompson ET Streets
« Reply #1 on: January 07, 2019 - 03:29:54 pm »
Is this a question or a statement? If you are asking, I'd say 15 yo tires may not be the best traction device available, but then it does depend slightly on how they have been stored and taken care of.
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline cudabob496

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Re: Mickey Thompson ET Streets
« Reply #2 on: January 08, 2019 - 01:28:31 am »
Is this a question or a statement? If you are asking, I'd say 15 yo tires may not be the best traction device available, but then it does depend slightly on how they have been stored and taken care of.

A statement. Car is always garaged, driven about 3000 miles a year. My fingernails don't seem
to sink into the rubber like they use to. It does make sense that the rubber would age and
some of its qualities would deteriorate. I'll put on the ET Street R's and see if it feels different.
The R's and S/Ss have the same R2 compound.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline 73440

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Re: Mickey Thompson ET Streets
« Reply #3 on: January 08, 2019 - 03:33:46 am »
https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/811885_tireagingtestdevelopmentprojectphase2evallab.pdf

A long read, look for small cracks along the sidewall, I know I should replace mine.
67 440
72 413 / 727
73 Barracuda w/ 68 440
65 Plymouth Fury III , I sold ,was my Nana's car till 92 yo.
51 Ford F1 239 Flathead, flipped , new cab , stolen
59 BelAir 283 4 door original patina
01 Chevy van 407,107 miles
06 Crown Vic Police Interceptor
75 HD Ironhead converted to RH shift
73 HD Ironhead
82 HD Ironhead
74 Norton 850
80 HD Shovelhead
80 Husqvarna WR 390

Offline cudabob496

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Re: Mickey Thompson ET Streets
« Reply #4 on: January 11, 2019 - 11:58:37 pm »
I got the new ET Streets. The rubber is much softer than the hard rubber
on my 15 yr old ET Streets, even though they are the same R2 material. I'm sure
traction will be better.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline cudabob496

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Re: Mickey Thompson ET Streets
« Reply #5 on: January 15, 2019 - 02:58:31 am »
https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/811885_tireagingtestdevelopmentprojectphase2evallab.pdf

A long read, look for small cracks along the sidewall, I know I should replace mine.

The below sums up the report. Basically, as tires age, their perfromance deteriorates.

"Canonical correlation of the properties showed that the properties of the components tended to change in the same direction with increased time in service in Phoenix or increased time of laboratory aging on each candidate method. Particularly, the hardness, modulus, cross-link density, and oxygen content tended to increase; and the tensile, ultimate elongation, peel adhesion, and flex properties tended to decrease over time. All of these changes are consistent with the proposed mechanism of thermo-oxidative aging."
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"