Big guy, I say go with the 163? Unless you like tight boonin and bouncin off everything you can find?
I think a 155 will go anywhere a 163 will, you just might have to work it a little more.
Spread your hand out, and from the tip of your thumb to the tip of your fingers is already more than the difference in length on the ground between these two lenghts of track. The big difference is in the "footprint" or square inches of track on the ground. Now some say that translates into more flotation, who really knows?
I'm still up in the air on this debackle myself.........
decisions,,,,,,,,,, decisions,,,,,,,,,,,,,,,, decisions??????????
Somebody please convince me.............
155 = more fun?????
163 = more float??????