ISSA - International Slalom Skateboarding Association

The Biltins are made for 400/1000" (10.16mm) hubs.
The Stingers are 300/1000" (7.62mm).

Unless you get a machine shop to shorten the Biltin spacer, you need to use conventional (albeit the smaller ones) spacers.

Q

Are there Biltins which fit to ABEC11 Stingers ? The spacer distance inside the core doesn't match the spacer distance of two bitin bearings!