I spoke to Tracks Canada, apparently the 15 wide 3" will be the same basic design as the Peak 2.5", but lugs are very soft. I could get the "old style" extreme in a 16 wide, but I didn't really want to cut it up. Ended up with the 2.5 extreme again (9175) for the new sled - never had a complaint with it before. Gonna be a long summer waiting for the new ride...