Holy trainer version 4 tube for replacement or change. Available in three colors (clear, black, and baby pink) and five sizes (Nub, Nano, Small, Classic and Maxi). “Classic” is the same tube as “Standard” on the full package, and is the larger of the two tubes.
The inside diameter of the tubes aside from Maxi is 33mm (~1.3″). The Maxi inside diameter is 35mm (~1.4″).
All tubes have three air vents except the Nub (which has only one).
If you are seeking replacement of a defective tube, you are warranted for one year from date of purchase.
All are compatible with the Holy Trainer v4 rings and Magic Lock. Versions 2 and 3 parts are not compatible with version 4.