Wheel Upgrade

Just over four years, and approximately 30,000 miles, we’ve gone through FIVE Goodyear Marathon ST tires.  Two catastrophic failures, that included massive trailer damage, one tread separation, and two large sidewall bulges.

one year old

For all you backseat drivers: this is under extraordinary scrutiny and care, as recommended by Goodyear. 

Catastrophic failure outside Jacksonville, FL


◊ TPMS to monitor proper PSI at all times.  

◊ Regular visits to CAT scale to insure proper loading.

◊ Never exceed the 65mph speed rating of an ST tire.

◊ Tucked each tire in at night with a blanky and bedtime story.

This was attached at one end, causing significant ($12,000+) trailer damage

I should note: one of the GYM’s was replaced in March 2009 with a MAXXIS 8008 ‘E’.  Had no problems with that one, after three years and 16,000 miles…  I should also note, Goodyear stepped up and paid the deductible on each separate claim, and also reimbursed me for the cost of the tires.

Tread separation

Regardless, I wanted the peace of mind knowing the trailer was outfitted with more substantial rubber- not these “ST” classified donuts… and the only way to do that was upgrade the rims from 15” to 16”, because tires with an adequate load rating are not available in 15″ size.  With a 10,000lb GVWR, I need a tire with a minimum 2,500lb load rating. 

Tredit T02, Michelin 225/75R16 LTX MS

Enter Michelin LTX load range ‘E’.  Low rolling resistance, all season traction, 2,680lbs max load (compared to 2,540lbs max on the Goodyear Marathon ST’s).  According to specifications, it’s 1.1″ larger in diameter than the OEM 225/75R15 ST’s, but there appears to be plenty of clearance.

OEM on the left, 16" upgrade on the right

As confident as I am with this new rubber, I’ve still got the TPMS installed…

We've got a lot riding on our tires...
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