Rim size has little to do with gearing. It's the OVERALL size of the rim/tire combo that matters. I am running 15" rims and the rear tires are 28" tall. I could run 17" rims and only have a tire that is 25" tall. Right now I love that I have 4.10's with the 28" tall tires, but if I install tires that are 25" tall I may not like how high my RPM's are at highway speeds.
James
This is kinda what I was refering top but kinda not. Imight have misworded but outer diameter(od) is what i was getting at. Street stangs runs lsicks at the track even the low power ones. I drive a v-6 with 3.8 and the websites i refer to are v-6 mustang sites. referring to 20" rims I was referring to stock mustangs which is still within the same OD that you guys are talkin about. You are right about the highway rpms. I have 17 rims with 45 series tires and OD is the same as the 14 inch rims with stock tires on my ranger. But that stang also has 2.73 gearing(mixup with 8.8 inch axle install) its an absolute acceleration dog compared to 3.73 gears, but it still gets up and goes. the clutch is still fine.
All im saying is teh gear ratios you guys keep referring to are not making sense to me. Like I also mentioned I drove a 91 ranger 2wd with 2.3 and 35 inch thornibirds(or did i say 31) and 4.11 gears, it would roll justlettin out the clutch and i didnt even have to give it gas, I almost couldnt stall it. the guy pulled a 40 ft boat with it(i might have given a differnt length earlier too, it was big) with the 2.0 I cant say anything because its a small motor i know nothing about, but anything over 4.11 gearing is overkill.
Ford put 4.11 in the 99 ranger stock in some 4x4 models, teh guy I spoke with got 11 mpg highway with 4.11 ad stock tires.
It just seems to me than 4.56 is alot of gear for a truck runnning highwys speeds no matter the tires size (with exception of 35 and higher)
:;Edit:: someone mentioned tranny gearing, this is something I didnt take into account, but the 4 cyl ranger and 4 cyl stangs used the same tranny for 2wd I thought.
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