I've never ridden on tipped rails. It looks like an obviously good idea for a long-track mountain sled in that it encourages weight transfer with that rocking-chair shape, and of course it makes turning easier on firm snow and groomed trails.

I'm wondering if there are any disadvantages for tipped rails on mountain/powder. I can't think of any obvious drawbacks. I have some vague ideas, for example it seems like a straight rail should float slightly better (in theory) than an essentially curved rail, but maybe not, maybe it's the opposite. I'm wondering what is the public opinion about this?

Ive ridden both and really dint know the difference till i was was told. granted the straight rails were only 136 and the tipped was 153.