For the Guys with 37's.....

[Verndog]

For those running 37's on their trucks. Have they figured out a way to get the speedo even close yet or are you stuck with it being way off all the time still? If so, how far is it off with the 35" setting in the computer. Thanks- Vern

[AlbertaStroker]

I'm 5km hr off at 100kmh. So not really noticeable

[Jbrozovic]

Mines about 1 mph for every 10 mph.

[Snake]

Originally Posted by Jbrozovic

Mines about 1 mph for every 10 mph.

+1 to this

[Andrew010]

Couple guys I've talked with said 7-8 mph off at 70-80 mph on the interstate.

This is the only reason I have 35s. I couldn't stand the speedo off that far.

It's absolutely retarded Ford designed a computer that won't accept larger than stock tires...

[TheBoss]

Ford didnt design the truck for anything aftermarket. Not their job to.

[Andrew010]

Originally Posted by TheBoss

Ford didnt design the truck for anything aftermarket. Not their job to.

Maybe not their job but every truck up to the 2011 was able to be changed in the computer, at least that's what I understand.

GM and Dodge have been able to be changed in the computer for 10+ years now. This isn't some new crazy idea that only a handful of people are interested in.


Every manufacturer should take into account what consumers want to do with their vehicles. Well over half of new vehicles (not including fleet) purchased in the United States will have some aftermarket parts installed within 90 days. Factory limitations can play a serious role in overall sales and simple little things like tire sizes shouldn't be a problem.

[TheBoss]

Ya. Not being able to adjust tire sizes has really hurt their sales. While i agree that you should be able to, I'm not going to lose sleep over it or ***** about it. Just figure out the percent it's off (~10%) and do an easy math problem in my head. My speedo now is off and I'm on factory wheels and tires.

[Silverspank]

I was disappointed to find out that I couldn't add larger tires. I really wanted the 19.5 for my dually. The 17's look way to small.

[ross3031]

An H&S can adjust for different size tires right???