Light and practical. This Schwalbe Race saddlebag comes complete with one tube and two tire levers. Bag simply mounts with Velcro hook and loop straps. Included:1 x Schwalbe SV15 tube Presta valve, fits tire size 700 x 18C to 28C Art.No. 10427343. 2 x Schwalbe tires levers, Art.No. 1388This a traditional design that works best with your saddle mounted in a forward or neutral position on your seatpost. If your saddle is pushed all the way back on the seatpost, you may have some interference with your upper leg. There are various solutions to reduce this overlap including using a small wood spacer between the seatpost and bag to reduce overlap.