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Author Topic: 255/70R22.5 Tire ?  (Read 471 times)
Tikvah
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« on: May 10, 2013, 01:41:51 PM »

I have access to 255/70R22.5 tires.  My bus currently has 315 80R 22.5

I don't know anything about tire sizes

Dave
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bevans6
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« Reply #1 on: May 10, 2013, 02:03:56 PM »

Type your numbers into this, and make up your own mind.  http://tire-size-conversion.com/tire-size-comparison/

Basically, almost 15% difference in speed at a given RPM.  Load capacity is 5510 at 120 psi for the 255/70R and 8820 for the 315/80R, based on singles.  About 40% less.  It all boils down to what your weights are.  Basically, the small tire is for little Class A RV,s and big Class C's, not really for buses.

Brian

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1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
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TomC
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« Reply #2 on: May 11, 2013, 08:54:36 PM »

The 255/70R-22.5 is a very low profile tire aimed at electronic trailers, low boy trailers, etc. It is rated at 5500lbs per single or 5000lbs on duals. If you put them on, you'll have a real low rider bus that won't be able to get in and out of driveways, but will look cool! Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
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