Upgrade Spare tire?
How far can I drive on my stock 255 70 17 spare if I have 285 70 17 onthe other three wheels. Will it screw up my diff. or transfer case?
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Originally Posted by Fillbilly
How far can I drive on my stock 255 70 17 spare if I have 285 70 17 onthe other three wheels. Will it screw up my diff. or transfer case?
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As long as the spare is about the same OD as the other four tires there shouldn't be any issues.
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Originally Posted by Fillbilly
How far can I drive on my stock 255 70 17 spare if I have 285 70 17 onthe other three wheels. Will it screw up my diff. or transfer case?
The 255/70's travel 97.6 inches per revolution. The 285/70's travel 102.8 inches per revolution. That 5.2 inch difference per tire revolution is slippage that can be hard on everything, especially 4 wheel drive, including anti-lock breaks that assume all 4 tires are the same diameter. When I upgraded my tire size, I purchased a matching wheel and 5 new tires to have the same size spare. When rotating the tires, just do a 5 tire rotation with the spare. |
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