You’ll love BFG KM2 for the first 20K miles, then you’ll hate them.
31" or 33" Tires on 1977 FJ40
- Thread starter RustyR
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
So how fast are you actually going with 33" tires?
GA Architect
SILVER Star
Not sure, I ultimately switched to 32's and 3.70 gearing. See post #77 on how I adjusted for this, -> click here <-
Same here, 32" Scorpion Mud (235/85/r16) and am installing fj60 3rd's. According to Spicer, 56 mph at 2200 rpm.
@Billinator Any new feedback on these Scorpion Muds? I'm looking at them being a great size and style but there's hardly any reviews or testing so you're my canary in the coal mine.
I'm also interested in switching from 31" to 32"... I rarely use 1st gear on the road so very curious about this. Even going from 31" to 33"
forksinthetrail
Frequent Lurker
33x10.5 BFG on 2.5" SOFT OME lift.
How does it feel going uphill in 3rd gear? What was your top speed on freeway before and after?
forksinthetrail
Frequent Lurker
Uphill in third is fine, fourth needs to be basically flat. I can go 65, but tend to stay below 60 so that I don't have fill it up every 150 miles. I don't have a good before/after comparison. I think 33's are about as far as you can reasonably go with stock drivetrain and not have any drawbacks...
Love these tires. Great off road tires. They are a little noises on road, but I’m just not worried about that. If you want siped tires, these may not be for you. Tires do tuck nicely in off camber situations.
Hi! What rims do you have? Stock 15s? Thanks!With a 2.5" OME lift and 33x12.50x15, so far I have really liked these tires....
View attachment 1030152
You can get them in 31x10.5x15
GA Architect
SILVER Star
Love those! Look great. Where did you get them widened? Local tire shop able to do that?
GA Architect
SILVER Star
FWIW: Jerry Robbins in Calhoun, GA did mine years ago.
Widened Steel Wheels
Just FYI, I noticed several people looking for a wheel widening service. Jerry Robbins in Calhoun GA just did mine for $50 ea. Took two days. Beautiful welds and perfectly trued. He’s a cool old school cat with a garage full of rat rods. You’ll have to bring your wheels to him though. Jerry...
forum.ih8mud.com
Has anyone ever tried to widen the OEM wheels with new shells?
This may be a crazy idea, but I’ve been wondering if this might work. I am in the the market for some 15” x 8” steel wheels with custom backspacing and would like to run the factory FJ40 hub caps. I came across these 15” Bart wheel shells and was wondering if anyone has ever tried welding in...
forum.ih8mud.com
Can you elaborate on this? Why the all terrain on the stock wheel fits better than the mud terrain? Thanks
brian
SILVER Star
They "fit" fine but they wear funny...muds having wider thread gaps wear funny too but its not as noticable.
Other way. The ATs have a flat tread that will be curved on the narrow rim. The MTs are different and work better on the narrow rim.
I daily drove mine with 33s and no lift. It shouldn't rub unless you're doing some really intense wheeling or putting some fat friends in the back seats.
that’s going to depend a lot more than just tire size. spring lift/sag will also be a variable that will come into play. just take the tire size you have now subtract it from the 31inch and divid that number by 2. that’s roughly how much taller your truck will be with 31s. this will let to see how close to the top of your garage you’ll be.
