For those wanting to run these on surfrodz.
16100-2Z Radial Ball Bearing Double Shielded Bore Dia. 10mm OD 28mm Width 8mm https://www.amazon.com/dp/B00IPSXCH2/ref=cm_sw_r_cp_apa_i_D0GwCbKWMXTF0
These bearings fit haggys 60t pully and surfrodz 10mm axles. You’ll need 90mm axles tho.
Also a assortment of spacers (you should have what you need with what came with your surfrodz trucks)
I also used
to get a tight fitment.