Axon X10 imperial size ball bearings
Axon’s X10 series of ultra high-quality ball bearings is soon also available in three imperial sizes. The range will include flanged 5/16-1/8 ball races for 1/12th front wheels, as well as standard and flanged 3/8-1/4 bearings for 1/12th rear axles, all of which come pre-lubed with a special low-drag oil for improved efficiency, acceleration and top speed. The bearings come in sets of two and they will hit stores by mid-March.
Please be aware that above image shows a metric X10 series bearing for illustration.
Source: Axon [team-axon.com]