Tire size change speed?

[johnross67]

I have a M8540 with 16.9-34 rear tires. In the owners manual the speed is specified for 30" rear tires. Does this mean that my tractor is actually faster than indicated?


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[North Idaho Wolfman]

Yep by a very small amount.
What are you worried about getting a speeding ticket?

 

[bxray]

You gain 12.56" per revolution of the tire.

About 13% increase.
So if your top speed is 10 mph then you will go 11.3 mph.
Watch out for Barney Fife!


Ray

 

[johnross67]

Thanks so much for the prompt reply [emoji106]


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[D2Cat]

Is your tractor 4x4? If so, you need different dia. on front also.

 

[johnross67]

Is your tractor 4x4? If so, you need different dia. on front also.

It is 4x4. The larger tire size is an option when ordering the tractor, the fronts are bigger also. But the speed chart is only for the standard tire size


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