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MrBeast · 11-28-2009, 01:33 AM

Also remember this when it comes to tire size, shortening the tires is going to greatly increase engine speed.

For instance I belive the stock tire for your truck was a 235/75r15 that is 28.88 inches in diameter, with a 3.55 rear end and a TH700R4 you will run 2,111 RPM @ 70 MPH,

If you go with a 26.88" tire on the same truck, you raise the RPM's to 2,269 RPM

That is a 158 RPM increase.

This has a lot to do with why big wheels have become so popular because they allow you to run a short side wall tire, achieve a look and keep your engine rpm's down and thus keep your fuel mileage up.

11-28-2009, 01:33 AM	#4
MrBeast high-Tech Red Neck Join Date: Feb 2008 Location: Livingston, MT/On my boat WA/BC/AK Posts: 2,294	Re: is cutting 2 drop coils a bad idea? Also remember this when it comes to tire size, shortening the tires is going to greatly increase engine speed. For instance I belive the stock tire for your truck was a 235/75r15 that is 28.88 inches in diameter, with a 3.55 rear end and a TH700R4 you will run 2,111 RPM @ 70 MPH, If you go with a 26.88" tire on the same truck, you raise the RPM's to 2,269 RPM That is a 158 RPM increase. This has a lot to do with why big wheels have become so popular because they allow you to run a short side wall tire, achieve a look and keep your engine rpm's down and thus keep your fuel mileage up. __________________ "He used to be a pretty nice feller, now he's a welder!"