On anything but hardpacked snow or groomed trails, you will have problems getting to 45-50 mph. Off trail in the deep stuff... be prepared to learn how to get unstuck. Replacing the track with something with a deeper lug would help that, but there just isn't much power in the 377 engine. Skandics aren't built for speed, but are more for utility. Skidoo has a good reputation for durability and ease of maintenance in those sleds, too.