The Rollerblade Switch UFS frame will fit up to a 72 mm wheel with the frame spacers positioned to the up position. The 2nd and 3rd frame spacers can be positioned so that a 56mm wheel can be used to ride flat with 72mm wheels in the 1st and 4th wheel positions.

The split of the 2nd and 3rd wheels can be adjusted from 10mm to 118mm by flipping the frame spacers. If you desire to use a wheel smaller than 72mm, the 1st and 4th frame spacers need to be positioned in the down position. This will prevent frame drag while turning. The Switch frame also includes flush axles (8 mm of diameter) and can be adjusted with a single tool.