Cooper ATT versus Cooper AT3 4S

Second Testing Session - #Cooper #Discoverer #ATT
Unfortunately we didn’t have any deep mud due to the previous drought even if we are testing after a full day of rain (yesterday). For the conclusions please pause the video at the end.
ATT at 1.8 ATM is a more than decent AT tire even if its summer biased compared with the impressive AT3 4S four seasons performance. We tested at 10 degrees Celsius, so it was a bit cold outside.
We will continue with the tests and hopefully we can find someone in the group who still has BFGs KO2s installed. We have two but they were busy, the rest has almost all went for winter tires or are on AT3 4S.
For this particular scenario where the ground is hard with dry-butter type mud and strong dry grass layer, the KO2’s design would have had a bit more problems than the ATT due to the fact that it would have not been able to dig deep. Still, we need to see this in testing, so stay tuned this Autumn for more versus.

Text Update - Interesting mentions:
1. The fact that if the rear wheels are on the earth-stair, then the car climbs much easier compared with if the rear wheels are directly above on the ramp. Most likely, the engine requires less effort to cope with the back wheels and and thus all 4 wheels have a greater margin for traction deployment until the grip is lost. Having more time to move the car and get into optimum traction looks like a good thing, otherwise it risks coping too fast with the car weight when the breaks are released on the ramp and they start skating/spinning on the spot.
2. The fact that on the same ramp you can spin-slide or climb depending on the pressure in the tires or due to the the traction-grip from a little more inertia, helps with identifying more easily the design differences between the tires.
3. The steps/stairs of the ramp help to reduce car speed-inertia and force the tires to lose their grip if you have too much speed (the front will bump too high), so this result will force the drivers normalize speeds much more than more than on simpler ramps.
NOTE: The video editing and the analysis work, takes almost twice as long as the tests themselves. Please then don't forget to share the video if you want to motivate such community efforts. Thank you.

Видео Cooper ATT versus Cooper AT3 4S канала Duster Trails