The 40's are fun to play with, but not an overall good wheel size IMO. I'd rather have the Mt's for play and race. Racing would be better because you'd have more weight per square inch=traction!! But that is one of the last things i will be getting. Still need a few more things....still need my neu motor!!!
"if you've got something to say, say it peacefully"
Grassy tracks maybe, but mine seem to float quite a bit on most terrain...and in grass, i can still spin quite easily. If it were hard packed and damp, then it would be nice, i get great traction on that stuff!
"if you've got something to say, say it peacefully"