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Old 08-17-2005, 03:47 PM   #1
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Interested if anyone is running the new Goodyear G614 "G" 16" tires on their class "C". My tire size is 225/75/R16, I would like to know if 235/85/R16 will work on my duals and have enough clearance. According to the Goodyear website these tires are for commercial trucks as well as trailers.
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Old 08-17-2005, 03:47 PM   #2
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Interested if anyone is running the new Goodyear G614 "G" 16" tires on their class "C". My tire size is 225/75/R16, I would like to know if 235/85/R16 will work on my duals and have enough clearance. According to the Goodyear website these tires are for commercial trucks as well as trailers.
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Old 08-18-2005, 01:05 AM   #3
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cal47, welcome to iRV2. We are glad to have you join us here. Hopefully one of our members is using this tire and can give you their expeirences with them. Good luck and enjoy.
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Old 08-18-2005, 07:32 AM   #4
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The Goodyear website or a dealer should be able to provide you with exact measurements for width, rolling diameter, etc. that you can compare to similar numbers for your existing tires. That will tell you how closely they match.

I would bet the 235/85 profile will be a different rolling diameter (and thus effective circumference) than your present 225/75's, which will change your speedometer/odometer readings a bit and also affect performance slightly (whether better or worse is impossible to predict).
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Old 08-18-2005, 12:38 PM   #5
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Cal,

As to wheather they will fit, the answer is yes they will.

The 225/75/16 tire is 29.2" in Dia, 9.1" wide and in a mile turns 715 revolutions.

The 235/85/16 tire is 31.8" in dia, 9.2" wide and in a mile turns 653 revolutions.

This will give you a 8.7% overdrive over your current tire size and will make your speedo off by 8.7%. Indicated 65mph would be actually 70.6mph.

My consern would be your top gear will be too tall of gear. In effect it would be like going from a 4.10 rear axle ratio to a 3.73 rear axle.

Also your braking force will be deminished by some % rating. Since the wheel will be turning slower at highway speed you will need more braking force to provide the same braking.

If it was me, I would stick to the original size.

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Old 08-18-2005, 01:09 PM   #6
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Our 5th wheel (see signature) came with LT235/85R-16G Goodyear Unisteel G614 RST tires, and they are great in trailer service. They run as cool as the LT235/85R-16E Michelin XPS Ribs I ran on my previous 5th wheel.

A couple of thoughts:

1. The G614 is a G-rated tire (3750 lbs @ 110 PSIG). Are your current wheels rated for 110 PSIG? Note on the upcoming website link that Goodyear stipulates that a special wheel is required, and the wheels that came on our trailer have a much thicker cross-section than comparable 80 PSIG rated wheels.

2. I really don't know about the traction, handling and ride of these tires in a Class C application - as the website link below shows, these are trailer-specific tires according to Goodyear - at least that's what they say here. That seems to conflict with the other Goodyear website data you found, so

Product Link

JM2CW

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