F150 Ecoboost Forum banner

1 - 2 of 2 Posts

·
Registered
Joined
·
301 Posts
Discussion Starter #1
I want to upgrade from stock FX2 aluminum rims with 265/60R18 Michelin tires to 20" optional FX2 rims that I bought used in excellent shape with a full set of lug nuts and 4 locks. I want to install 295/45R20's. I've searched here and many sites and Goggled for the answer and found only 1 other F150 owner who has done this. I have used many of the Plus size calculators and they all basically say the same. The 295's are a good match except they recommend a 9.5" wide rim whereas the FX2 20" rims are 8.5".

The Ford 20" tires are 275/55R20's but that means they are a taller tire (31.9" vs 30.5"). I'd like to go with the 295's.

Any issues?

2011 SCREW 2wd Eco.
 

·
Registered
Joined
·
11 Posts
The width of the rim is within the range for those tires. I can't imagine why you'd want to go down in diameter when you could run some 305/50/20s just as well but be almost identical in diameter. And your width is still within range...I'm doing a 305/50/20 on a 9" while the optimal width is also 9.5". I even have some 33/12.50/15s on 15X8 Mickey Thompson's on my Jeep TJ. I'd prefer a 10" wheel there but I selected those wheels for 32/11.50/15s when I first built it. It's just fine but makes the tires not as fat as if they were on a 10" wheel. As for my Mustang, I run 10.5" width wheels with 315/35/17s out back and they are WIDE!! Up front I've got 275/40/17 on 9" wheels and they're pretty aggressive as well. Of course, it appears that the more sidewall you have, the more forgiving it is.
 
1 - 2 of 2 Posts
Top