The Kryptonite Series 2 Long Shackle U-Lock - 4x11.5" is long enough to easily lock both the frame and wheels to the rack. To get both wheels you can remove one and put it next to the other. If removing it inconvenient, we recommend pairing this U-Lock with a flex cable. The long shackle Kryptonite lock is my personal favorite of the U-Lock sizes. It includes a bracket to attach the lock to the bike frame while you ride.