Mine are deep groove radial contact bearing used in a hub that cannot load them in an angular fashion, from the side, so as to bind..



If you can side load them an angular contact bearing would be the choice,, and like old loose ball hubs it is possible to compress the hub axle with the QR

and side load the axle cones and the bearing balls, that way ..

so the mechanic leaves the adjustment loose which comes into adjustment when the QR is tightened, on the bike..






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