Has anyone got a chance to skate the Spitfire Formula 4 Lock Ins? Are they legit or just a gimmick? I don't know how I feel about just one side being cut straight and the other side being radial. I like to rotate my wheels every so often to insure even wear but it seems like rotating these would negate the 'lock in' feature since the radial side would now be on the inside of the trucks.
I have a set of the 55mm 101s and they do what they claim. I can consistently get a few feet longer on grinds with less effort. I have only skated them at parks with coping or angle iron, or on ramps.
Unfortunately, I got a flat spot 30 minutes in with the while skating a masonite mini ramp. That's a bit of a bummer. It's my first experience with the 101 F4s.
One thing I do notice is that they have a wider riding surface and so they are a bit slower, but you have to give something to get something. Forget rotating them. I give the shape the thumbs up.
That said, I would like to see a slightly thinner version of them just because the riding surface is so wide they are heavier than the same size of another cut. I think a thinner shape -and maybe a classic cut on the non lock-in side - would make them a bit faster and quicker to flip.