Invader rear suspension wheel size

[nickw]

Pulled the rear skid out on my '80 invader project last night.  Looks like almost all the bearings are shot on all the wheels.  Can anyone point me in a good direction for finding replacements?  What size should I be looking for?  Also noticed it has the three wheels on the back but a rubber track.  Do I need to convert to a 4 wheel setup?

[jimvw57]

The 4 wheel setup was used on the suspensions that were changed out from the original tracks that tended to throw cleats out the back. If you use the 3 wheel setup, you may not be able to get the track tightened up enough. The 4 wheel setup used slightly larger wheels.

[nickw]

Well got the rear ski almost back together.  Ended up reusing all the wheels and replacing just the bearings and inserts.

All the wheels use a 6205-2rs bearing and 3/4" inserts.

Bearing
https://www.denniskirk.com/parts-unlimited/25x52x15mm-bearing.p1251.prd/1251.sku

Inserts
https://www.denniskirk.com/parts-unlimited/small-flange-idler-wheel-inserts.p04222.prd/04222.sku
https://www.denniskirk.com/kimpex/large-idler-wheel-inserts.p04223.prd/04223.sku