Toyo Open Country AT3 VS BFGoodrich KO2

Toyo Open Country AT3 and BFGoodrich KO2 are both All-Terrain (A/T) tires that are designed to provide a balanced performance while on and off-roading. KO2 due to its lower void ratio excels in on-road traction whereas a higher void ratio of AT3 allows it to perform better while off-roading.

The higher built strength and increased durability certainly give an advantage to AT3 over its counterpart. The traction of KO2 is outstanding on rocky terrains and this is because of its special design, further details are shared in Off-Road section.

Comparing Toyo Open Country AT3 with BFG KO2



AT3 has an aggressive symmetrical tread design with a higher void ratio which allows a limited patch of tread blocks in contact with the ground. Thus, minimal contact decreases the grip of the tire hence resulting in poor on-road traction. The wide grooves along with deep sipes cause water to easily pass through, leading to great wet traction, hence avoiding hydroplaning. Wider grooves are also responsible for the efficient removal of mud and soft snow through the tread. The stone ejectors are embedded to avoid stones/pebbles from getting stuck inside the grooves, but they are not superior to KO2 stone ejectors. The built quality and durability of AT3 is also better compared to other all-terrain tires.

KO2 also has an aggressive interlocking tread blocks design which employs a lower void ratio allowing a generous contact patch with the road, resulting in better grip. The superior shoulder built, and serrated design combined with narrow grooves allow great dry on-road traction. The narrow grooves combined with shallow sipes don’t allow satisfactory wet traction. Narrow grooves also hinder the effective removal of mud and snow from tires. The bold stone ejectors allow confident navigation in rocky terrain as they avoid stones from getting stuck inside the grooves. The traction of the respective tire is also remarkable on icy roads due to higher contact patch and numerous sipes. The built of the tire is not as strong as that of AT3 and it also lacks durability and treadwear resistance.

On-Road Traction Comparison

AT3 having a higher void ratio allows lesser contact between the tread blocks and the road which causes lesser grip, leading to decreased traction. The wide grooves and high number of deep sipes effectively pass water through them, preventing hydroplaning and allowing good wet traction

KO2 on the other hand due to the lower void ratio allows great traction as there is more contact between tread blocks and ground. This enhances grip, therefore increases the overall dry traction on the road. The narrow grooves and shallow sipes are not much effective in wet conditions as they aren’t able to wipe water efficiently, causing hydroplaning.

Off-road Traction Comparison

Mud Terrain

The higher void ratio of AT3 allows it to easily navigate through the mud by effectively throwing it backwards with the help of its wide grooves. The large lugs along the shoulders also help in the effective removal of mud from the grooves. The overall mud traction of AT3 is far superior.

KO2 with narrow grooves and small studs along shoulders cannot effectively throw the mud backward and the tire will be unable to produce good traction. If used in deep mud, these tires will get stuck due to the filling of grooves with mud.

Snow Terrain

The wide grooves of AT3 allow easy navigation in soft snow as the snow can easily be thrown backward but the traction of respective tires on icy roads is very poor due to the lower contact patch of tread blocks. The tire has a three-peak mountain snowflake (3PMSF) rating, but it is still not effective in hard snow.

KO2 on other hand with narrow grooves is ineffective in throwing back soft snow therefore unable to maintain traction. The lower void ratio, however, is effective in maintaining its traction on an icy road as it has a decent contact patch and a high number of sipes. It is also three-peak mountain snowflake (3PMSF) rated, but still, it is not suitable for hard snow.

Rock Terrain

AT3 has a high void ratio which enables better grip for tricky angles of approach on rocky terrain, but the stone ejector design is far lacking compared to its counterpart. The shoulders are also not strongly built which puts it at a major disadvantage in rocky terrain.

The bold stone ejectors of KO2 along with serrated design and strongly built shoulders allow better traction on rocky grounds even with the lower void ratio. As stone ejectors don’t allow any stones/pebbles to get stuck in grooves, while high strength shoulders avoid chipping.

Which tire is more Comfortable?

Open Country AT3’s wide grooves trap more air inside while traveling at high speed on-road. This air after getting trapped inside the grooves strikes its walls back and forth, producing noise. The noise decreases the overall comfort of the tire.

Due to narrow grooves, the overall comfort level of KO2 is much higher as lesser amount of air it traps inside its narrow grooves and the air particles produce negligible noise. For people concerned about noise, this tire is preferred.

Durability and Treadwear Differences

The wide grooves of AT3 ensure a limited contact patch of tread blocks allowing minimal rolling resistance which is the force required to roll the tire. The lower rolling resistance leads to decreased treadwear, increasing its mileage as well. It consists of a two-ply polyester casing with twin high-strength steel belts with extra added nylon reinforcement ply. Due to its high built strength and lower rolling resistance, the durability of this tire is far superior. (Compared to KO2)

The lower void ratio of KO2 allows better traction of tire leading to higher rolling resistance which increases the treadwear, hence decreasing its durability. It consists of twin steel belts reinforcements with spirally wrapped nylon and 3 plies polyester cord sidewall, but it is still not strong enough to counter its competitor.

Price Differences

KO2 is a much expensive option that offers better on-road traction with good rock traction capabilities while AT3 focuses more on mud and snow traction and provides better durability. The selection of tires depends upon the application and priorities of the consumer.

Quick Summary

  • Both tires are All Terrain (A/T)
  • On-road dry traction of KO2 is better.
  • The off-road performance of the AT3 is better in mud while KO2 performs better in rocky terrain.
  • AT3 performs better in light snow.
  • KO2 is better equipped to counter noise making it more comfortable.
  • The overall durability and treadwear resistance of AT3 is better.
  • KO2 is more expensive compared to AT3.