BMC urbanchallenge UC01 - Shimano Alfine 11, gates carbon drive, BMC aluminium frame, Alfine Disc Brakes, Integrated rechargeable LED lights into the fender, ~11,5 kg, ~€1900
BMC Alpen Challenge AC02 2011 Hybrid Bike
BMC Urban challenge UC01 Alpine 11
If you need a bike that is really can`t produce any sound at all then choose BMC UC01. What makes it so different is the bike chain that does not use a regular chain, but using a material from carbon called carbon belt drive. The use of this material will not make the bike to produce a sound just like other bicycle chain in general.