So, after having a lift for many years, I FINALLY bought bigger tires! Yea me!
I bought 33x10.50 15 KM2’s and got a deal on aluminum rims (MB72, 15x8, 19mm off-set (about 3.75BS).
The Jeep now looks the way a Jeep is supposed to look
(see attached pics)
Now for the Tech content:
I have been living with drive line vibrations (60+ mph) ever since I got a SYE.
Nothing short of driving w/o the rear shaft remedied the vibrations. Long story short, no more vibrations with the new wheels!!
I have only gone through one tank of gas so far, and was being a bit aggressive testing for drive line vibes and acceleration going up hills, but I got 13.5 MPG, which falls within the range I usually get.
My speedometer is reading 35 MPH when my GPS reads 40, and 60 when the GPS says 70.
The odometer read 200 miles vs 236 on the GPS.
The transmission is running about 20 degrees hotter (150-170 vs 125-150 before, per my aftermarket gauge) but the engine seems to be running a few degrees COOLER (like, half the needles width)…?!?
I haven’t decided what pressure to run yet. America’s Tires set them to 35 PSI, and then Firestone indicated they set them to 33 PSI when they set the toe-in.
They are louder than the Wrangles ATs I was running, but not terrible so. You can also FEEL the tread at highway speeds and just as you slow to a stop.
The new wheels have not affected the tendency of the front end to follow every irregularity in the road (poor caster, and my track bar / drag link angles might be a bit off), but I wasn’t expecting them to.
I also have no rubbing at full lock.
I have not done any off-roading yet, and have not set my bump stops.
…what else… it’s even harder now to climb into the driver’s seat
, and the engine compartment is almost chest high, but working UNDER the Jeep is a bit easier now