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Archive for November 16th, 2005
Power at the Wheels - 22.5 vs 24.5
Posted by Tim on November 16, 2005
I have been hearing for decades that a class 8 truck has more power at the wheels if the tires are smaller on the drives, such as 1100x22.5 as compared to 1100x24.5 I prefer the larger tires because they turn less revolutions per mile which means to me longer life. Any truth to this?
Smaller diameter tires will have the same effect as putting the vehicle in a lower gear. The torque will be increased. There would be very little difference in treadlife of the tires you mention (all other things being equal) but, since the engine RPM's are greater at the same vehicle speed for the smaller tire, fuel economy would be negatively affected.