I recently picked up a few 5mm x 10mm x 4 mm spacers in an attempt to find an A-bearing blank.
The spec on the inner diameter is 5.3mm -0/+0.3mm while A bearings have an inner diameter spec of 5mm. I bought a few because I knew fit would be loose, but I hoped to find one that had the least “play” and try with that. I threw them on a bearing removal tool, and found the one that had the least play and tossed it into my Weekender and so far we have success!! My Weekender is now a fixed axle!
After a few minutes of play I took it apart to check the bearing posts and I didn’t find any damage, so I’m pretty sure its not acting like a transaxle. Super stoked here!! Another option for Fixed Axle February.