18" tubes that fit the rear tires for the Kalk Race model and offer puncture resistance, size:3.25-18
For more information on how to change your tubes visit our Service and Support page and watch the instruction video.

This kit includes:
1 tube 18 inch for rear race tire dimension 3.25-18

The tube fits all Kalk bikes if it is equipped with 18" race rear tires.

This part fits: