Yes, neither will work with Caliber II’s, or any “regular” skate truck (8mm axle).
Trampa sells 10 and 12mm axle trucks - and these wheels are setup for those axle sizes. You can find some 10mm axle skate trucks (I think i have a set of bears with 10mm somewhere) - but less common than 8mm, and you’d need to some creative mounting (like Ronin tube adapter/mount via epoxy).
I believe there are other pneumatic tire options out there that use 8mm, but don’t know sources. Hopefully someone can comment w/ link to them for you.
Hi Gents, just to ask a question without opening new topic. I just bought MBS Matrix 2 trucks with 12mm axle, but I have pneumatic wheels with 6200rs bearing, do you know how can and with what I change them to 12mm?
Thank your for help