smaller diameter tire

[Sixpac2]

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Hi,

I have a 04. 5 Dually 3. 73 gears, NV5600 with 235/80/17 tire.

We are full time RV'ers tow a heavy fifth wheel.



At the speed I LIKE to tow I NEED WANT 150 more rpm's to be in the sweet spot with out going to fast.



Is there a 17 inch tire that can help with that. The stock tire above is about 31. 5 in diameter.



Looking for any ideas or sugestions.



Thanks

 

[KRStone]

Keep your wheel size, get a narrower tire and a lower profile: 215/65 - 17

Not sure what is avail in a load E rated