Managed to buy a pair of unused Rock Shox Mag 21 (1995 made) for a Retro mtb build. However does anybody know how you pump up the air pressure? There does not seem to be anyway to pump air in apart from a real thin hole at top? Is there a special tool?
The valve for the air spring requires one of those needle-type adaptors, you know the kind that are used to pump up footballs. It is important that the needle has the hole at the end, not the side.