I have a 1999 CR 125 if I buy a 2000 model rear wheel can I put 1999 bearings in it and put it on my bike?

Question

The only difference i am aware of from 1999 to 2000 is that they went from a 20mm axle to a 25mm axle I just want to know if they only changed the inside diameter of the bearings and spacers or if they also changed the outside.

Answer 1

buy the complete set on ebay, wheel, spacers,bearings,adjusters and axle bolt. the swingarm is the same.

Answer 2

If the axle diameter changed, then obviously the inside diameter of the wheel bearings changed. Plain and simple. Since the inside diameter got larger, the outside would have to increase also. Or else the "balls" would get smaller and weaken the strenghth of the bearing.