Velocity A23 are now 650b, I think Pacenti SL23 are available in 650b - Not sure about availability in this country as yet.
If not, any 650b MTB rim will work, Pacenti TL28, Stans, as Jameso Said, Velo Orange do a 650b rim.
Ritchey make a 650b MTB slick which is available from Paligap in the UK
@Keppel started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Velocity A23 are now 650b, I think Pacenti SL23 are available in 650b - Not sure about availability in this country as yet.
If not, any 650b MTB rim will work, Pacenti TL28, Stans, as Jameso Said, Velo Orange do a 650b rim.
Ritchey make a 650b MTB slick which is available from Paligap in the UK