I'm changing my spare front wheel from a 20mm to a 25mm spindle ( to match my current one ), I've found out the old 20mm bearings are 6204, 47mm x 20mm x 14mm and the new 25mm ones are 6005, 47mm x 25mm x 12mm. Therefore I have to space out the new bearings by 2mm to make the distance between the outer faces the same. This also means I have to make a new spacing shaft for between the 2 inner faces which is 4mm longer than the old one.
Confused?? Ditto!!
