Replacment Rockshox Deluxe & Super Deluxe A1 - B2 Damper Bodys
65mm is the same over length as 62.5, 60 & 57.5mm they are use on all shox lengths 230mm & 205mm.
55mm is the same over length as 52.5 & 50mm they are use on all shox lengths 210mm & 185mm.
45mm is the same over length as 42.5 & 40mm they are use on all shox lengths 190mm & 165mm
The difference is what the numbers show (stroke and sag) The most critical part is the stroke reducer which your shox should already have install from factory, 7.5, 5 or 2.5mm.
