Not much Pros but Ive seen Kenny Beleay (the guy with sir Enzo in the gallery) use rear DB at some point he competes in WC, I doubt if he still uses since the fad now is having lightweight trials bike. Also a lot of new school guys who knows how to true their own wheel are using DBs
One nice feature of this frame is the integrated tensioner not show here.
Always remember that you are unique. Just like everybody else.