Woosah
Active Member
- Thread starter
- #1
Hi all, long time lurker first time poster. Here's some info on my current setup, I hope it helps someone make an informed decision. This forum is full of great info, hopefully this adds to it.
Vehicle is stock height 21 Rubicon, no lift.
BFG KO2 37x12.5 R17 Load Range C
Method 703 Matte Black 17x8.5 +25/5.78"
Wheel and tire weigh 94.6lbs according to my bathroom scale. For reference, my stock rims and tires (30,000 miles 11/32 tread) weigh 84.4lbs.
Height of Tires is 34" 5/8th measured at 37psi from center of tire/wheel. (apologies camera was crooked but level was level)
Poke is about 1" all around, stock Rubicon flairs
Assuming this info is nearly correct, here's the conversion chart from stock. I'm not 100% on stock wheel offset of +36mm, it's an internet number that I found.
Tazer mini set at 36.54 produces an accurate speed, checked at 50, 60, and 70mph with cruise control and a gps speedometer phone app.
Subjective driving impressions over the last 100 miles have been positive. The vehicle performance matches my preferred driving style, which is slooow. i'm about 50/50 local and highway, avg'd 17.5 mpg the last few days of mixed driving. The steering feels very similar to stock. I actually can't feel a difference. The vehicle was starting to wander a bit on the highway on the stock falken wildpeak MT's, and now the wandering is much less pronounced, almost negligable except for heavily crowned roads. Upon inspection of my stock tires, they show signs of over inflation wear (band right down the middle), which could have contributed to the wandering. They were also starting to get louder. These KO2's are usually quiet when new and the change is very noticable and much quieter. But that's an old M/T compared to a brand new A/T, so YMMV. The increased size of the sidewalls defintely absorb the smaller bumps and potholes much better, making the ride less bumpy and more stable, almost feels like I got new shocks (I'm still on the stock fox shocks).
Transmission finds 8th gear at 60-65mph and cruises comfortably, doesn't hunt around for gears. I do not drive or accelerate aggressively (those days are long gone). I know in the back of my head that there has been a loss of power/performance due to +10lbs more wheel/tire weight, but for daily driving around town and on the highway, I perceive no meaningful impact to my driving style due to the bigger tire size & weight. If you accelerate hard or drive real fast, I'm sure there's a downside to going bigger/heavier that one would have to consider, but for me, it hasn't changed anything about the way I drive or expect the jeep to drive.
I hope this information is helpful to someone down the road. I've found bits and pieces of all this info in seperate posts, and it very much informed my purchasing decision. I'd hope someone would/could be helped by having all this in one place.
Vehicle is stock height 21 Rubicon, no lift.
BFG KO2 37x12.5 R17 Load Range C
Method 703 Matte Black 17x8.5 +25/5.78"
Wheel and tire weigh 94.6lbs according to my bathroom scale. For reference, my stock rims and tires (30,000 miles 11/32 tread) weigh 84.4lbs.
Height of Tires is 34" 5/8th measured at 37psi from center of tire/wheel. (apologies camera was crooked but level was level)
Poke is about 1" all around, stock Rubicon flairs
Assuming this info is nearly correct, here's the conversion chart from stock. I'm not 100% on stock wheel offset of +36mm, it's an internet number that I found.
Tazer mini set at 36.54 produces an accurate speed, checked at 50, 60, and 70mph with cruise control and a gps speedometer phone app.
Subjective driving impressions over the last 100 miles have been positive. The vehicle performance matches my preferred driving style, which is slooow. i'm about 50/50 local and highway, avg'd 17.5 mpg the last few days of mixed driving. The steering feels very similar to stock. I actually can't feel a difference. The vehicle was starting to wander a bit on the highway on the stock falken wildpeak MT's, and now the wandering is much less pronounced, almost negligable except for heavily crowned roads. Upon inspection of my stock tires, they show signs of over inflation wear (band right down the middle), which could have contributed to the wandering. They were also starting to get louder. These KO2's are usually quiet when new and the change is very noticable and much quieter. But that's an old M/T compared to a brand new A/T, so YMMV. The increased size of the sidewalls defintely absorb the smaller bumps and potholes much better, making the ride less bumpy and more stable, almost feels like I got new shocks (I'm still on the stock fox shocks).
Transmission finds 8th gear at 60-65mph and cruises comfortably, doesn't hunt around for gears. I do not drive or accelerate aggressively (those days are long gone). I know in the back of my head that there has been a loss of power/performance due to +10lbs more wheel/tire weight, but for daily driving around town and on the highway, I perceive no meaningful impact to my driving style due to the bigger tire size & weight. If you accelerate hard or drive real fast, I'm sure there's a downside to going bigger/heavier that one would have to consider, but for me, it hasn't changed anything about the way I drive or expect the jeep to drive.
I hope this information is helpful to someone down the road. I've found bits and pieces of all this info in seperate posts, and it very much informed my purchasing decision. I'd hope someone would/could be helped by having all this in one place.
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