FlatFace Jay J4 Linehan Signature Fingerboard G4 Bearing WheelsThe elusive Jay Wheel is finally back. After originally producing a few batches years ago, the exact material formula was lost, and it took nearly six years of trial and error to recreate it. Now its back, and this time the formula is here to stay. In terms of feel, the Jay material is more grippy than standard FlatFace wheels, but it is not urethane. Compared to urethane, it is slightly harder and less grippy, with a smooth, controlled ride. The