After researching the net, I’ve found that these are missing really. They do not exist AFAIK. Maybe I’m wrong, but couldn’t get a hold on them.
If you wish to use 12mm trucks with street wheels, your options are limited.
Therefore, I’ve decided to try and manufacturer them and really would like to see if there is some sort of demand for it.
Materials, 304 stainless steel rings +Si3N4 ceramic balls (may change), lubricated.
The final cost per pack (8 bearings) will be around 50-80$ (not final).
The bearings are almost ready, once we’re ready I will publish the final price. I know there is a discussion about their ability to last. These are going to be robust! BUT frankly, bearings are not meant to last forever, so anyhow we are aiming for a price range that is considerably affordable to be able to swap if needed. They will be priced like this not because we want to be rich (we want to, but no like this ), it’s because they are not standard and hard to manufacture, so please keep that in mind.
That is also a good option, however, it may be tricky to push them to metal core wheels (not many in the market but there are such …) that will require high precision and tolerance so not sure how this will work though with an insert.