I have a 1.75"x 136" backcountry on my 03 rx1. It was on it when I bought it last year. I do about 50/50 trail/powder and I absolutly love it. I thought it was going to be a problem with the sliders getting snow or lug issues on the hard pack trails but after 5000 miles there is no issues and the track is just like new. 3000 miles were on the proaction skid and 2000 have been on a ZX2. I don't even run scratchers. My wife has a 1.25" on here attack, not sure what it is, but with the power it has it just spins on take off, where mine just launches. Would love to put one on it. Day and night difference in my sled and hers in the powder. In the deep powder of the lakes the backcountry performs execlent. Once this one is wore out I will be putting on another one. Sounds like you ride similar to me, so I would suggest the backcountry, you will not be dissapointed.