1. Rough Terrain. The best wheel over rough terrain. The sine wave shape tends to kick pebbles and small objects out of the way. Also the best wheel over wet conditions. Scientifically proven by San Diego State University, Mechanical Engineering Department.
I have an old board that my cousin built for me when I was 315lbs, 8" wide, 1/4" risers with 60mm hard wheels. Now a more spry 205lbs i decided to get back into boarding. Those old wheels and versions had zero glide and made it nearly impossible to go over the cracks in my driveway without kicking. I had heard of these wheels and their reputation, so I decided to try them. Long story short I took my old wheels off, added these Shark wheels and now I can ride conformity and confidently on my driveway while relearning my board control and body control. Plus the turquoise color is sick! 100% recommend this product to anyone who skates less than perfect surfaces, oh yeah, they really do kick gravel out of the way, surprisingly well! I even have my neighbor seriously considering getting a set for one of his cruiser setups.
The width is increased, but the friction is decreased! The sine wave design provides three lips per wheel for superior lateral grip. When you want to slide, they break away smoothly and recover easily.
The wave pattern design allows for a thin contact patch touching the ground and therefore less friction, resulting in a quicker ride.
The alternating pattern of grooves significantly reduces hydroplaning by channeling liquid, sand or gravel out and away from the surface of the wheel, allowing for a firm contact patch with the ground.