I like your tyres.. What brand are they?
Today I visited this 1/8 scale track.
http://revrace.com/
I took my TRF201 and XV-01. I did not have much luck with my TRF201, I'm new to off road buggy and did not have the correct tyres with me. So I decided to run the XV-01.
I ran a 96T with 48T pinion and 17.5. The car was very fast and controllable. I wish I had your tyres, they would have been better for loose dirt. I was running HPI rally, they were pretty good.. As usual with this car, the rear was a little loose at times.
Everyone at the track was "SHOCKED" and so was I! I was able to clear every double jump except for 1 (photo bellow, distance was too far for 17.5 motor). Since its an 1/8 scale track for buggy and truggy, you can imagine the size of the jumps. My XV-01 was sometimes 6 ft / 2 m in the air and it landed 95% of time perfectly. I ran two battery packs and zero broken parts.