Originally Posted by Casper

I think this is what Ryan was refering to.

"European, high-bite Astroturf style tracks often favour the mid-motor configuration whereby the mass of the motor is placed inboard and where its rotation is optimised by a 4-gear transmission to aid drive and traction whereas clay and traditional dirt style tracks can require the more traditional 3-gear rear-motor configuration. The TLR 22 is the first production car in the world to encompass the dramatic differences and design challenges of combining both concepts into the one buggy."

The mid motor takes weight off the rear tires. This allows the rear to rotate more and gives the car more steering. When running on grass and astroturf (or extreme traction clay "aka slicks") the mid motor is a great tuning option to take excessive rear grip out of the car and give it more steering. For most US style dirt tracks the rear motor option to give the car a little more rear traction will be the best option but you get both with the 22. According the Dyno interview on RC tech. with about 30-40 min of work you can see if you like it yourself. All parts for both configurations are included in the kit!