Just discovered Royal Enfield will sell me an 18" front cast wheel for $300.
Problems: 1. axle diameters 17mm vs 15mm
2. brake adaptation?
My 16" GS450 rear wheel works perfect. The front GS is 19"x1.85 a no-no.
Comments?
Cheers!  
ps: just had a flash: find a 15mm bearing with an OD to match the RE hub ?