It was finally time to replace the stock BFGoodrich KM's on the Jeep. These managed to last me 4 years and about 40,000 miles. Yea, it doesn't seem much driving since we take the wifes comfy ride nearly everywhere. Mine is the go to the beach, haul debris and stuff that can spill and mess up the interior vehicle. I was originally looking at replacing them with some 35's in the KO2 line, but was starting to lean more towards replacing the KM's with a tire better suited to all the rain we get here in florida, but still had a somewhat aggressive off road capability. I like the reviews of the new KO2's, so when I was able to get a really good deal on a set of 5 tires and wheels I decided to replace mine. Couple things I noticed right away, these are stiff in comparison to the KM's, but expected since I went from a load range C to an E. The tires were a lot heavier, so acceleration wasn't as fast as it used to be, gas mileage went down about a mile/gallon, oh and of course they pick up every single little rock in the road and fling them everywhere. Aside from that everyone seems to really love the way they look and are impressed with how quite they run. Now, none of this was unexpected, it comes with the territory of bigger tires. It's more the gearing required to overcome the inertia of the tire size than the weight of these tires. I only gained about 90lbs unsprung weight since my new wheel actually weights less than the stock Moab.
Size
Load
Range
Weight
Max Load
Max. Inflation Press.
Tread Depth
Rim Width Range
Meas. Rim Width
Sect. Width
Tread Width
Overall Diam.
Revs Per Mile
255x75R17
C
46.7lbs
2,405 @ 50
50psi
19/32nds
6.5-8.5"
7"
10"
N/A
32.1
649
315x75R16
E
66lbs
3,860 @ 65
65psi
15/32nds
8-11"
8.5"
12..3"
N/A
34.5"
602
Speed MPH
Old
New
5
5.39
10
10.78
15
16.17
20
21.56
25
26.95
30
32.34
35
37.73
40
43.12
45
48.51
50
53.90
55
59.29
60
64.68
65
70.07
70
75.47
BFGoodrich All-Terrain T/A KO2
The All-Terrain T/A KO2 ("KO2" for Key benefit On- and Off-road with 2 identifying it as BFGoodrich's 2nd generation KO tire) is an On-/Off-Road All-Terrain light truck tire developed to meet the needs of jeep, pickup truck and sport utility vehicle drivers who want confidence and control on- and off- road. The All-Terrain T/A KO2 was designed to deliver go-anywhere traction along with outstanding durability, great wear and year-round traction, even in snow.
All-Terrain T/A KO2 tires feature a racing derived cut-, chip- and tear-resistant tread compound that delivers longer life (up to 2 times the previous generation tire's treadwear on gravel roads). The compound is molded into an aggressive, computer optimized, high-void all-terrain pattern with interlocking tread blocks, innovative siping and multiple loose object ejection features to combine off-road durability and traction with on-road handling and acceptable noise.
Upper shoulder Sidewall Armor features a tougher sidewall rubber compound that's twice as thick as its predecessor and a Serrated Shoulder Design that delivers additional traction by providing the clawing action necessary to develop traction and steering control in deep dirt, sand or on rock during "aired down" off-road driving.
The tire's internal structure includes twin steel belts reinforced with spirally wrapped nylon on top of BFGoodrich's TriGard, 3-ply polyester cord sidewall ply construction (2 plies for Load Range C tires) for strength and durability.
Single strand beads (a single strand of bead wire is continuously wrapped multiple times until the desired strength is provided) enhance the tire's fit to the wheel to improve uniformity and ride quality.
NOTE: BFGoodrich All-Terrain T/A KO2 tires meet the industry's severe snow service requirements and are branded with the mountain/snowflake symbol.
Additional
Parts:
None
Tools
Needed:
Lug Wrench
Jack
Flat Tip Screwdriver
Pliers
Installation:
1. This is as simple as blocking the tires, jacking one up, removing the lug nuts. You will need to use the flat tip screw driver and pliers to remove the retainer clips that are installed over the lug nuts during assembly to keep the rotors in place. These may interfer with after market rims.
