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dirtdivaca's avatar
dirtdivaca
Explorer
Jan 26, 2014

Going from 20" to 17" -18" wheels - better tow capacity?

We are newbies and getting our first trailer soon – yay! We discovered our 2005 F150 Supercrew has 20” aftermarket wheels (Toyo Proxes ST II 285/50R20 ). Looking over the Ford Towing Guide, it says GC...
Peg_Leg's avatar
Peg_Leg
Explorer
Jan 27, 2014
The diameter of the tires are what you need to check. A low profile 20" tire could have the same diameter as a 17" tire. A smaller tire diameter will, to some degree, help with towing.

The tire sidewall is where you want to check for load capacity. The max load in kgs/lbs will be listed for the max air pressure when the tire is cold.

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