I know you've probably seen this already...
Dedicated to BMX racing: Shimano DXR
Shimano is introducing completely new and innovative components specifically for BMX racing, which will be an Olympic sport as from the Olympics of 2008 in Bejing, China. Shimano DXR cranksets, hubs, brake levers and brakes have been developed in co-operation with experienced BMX racers to offer superior performance for this demanding sport.
Probably the most important component of a BMX racing bike is the crankset. Especially at the start, riders put excessive force on the crank. Therefor the crankset should be very rigid and reliable to transfer the power of the riders directly into speed. Keeping this in mind, Shimano developed the FC-MX70 crankset which is based on the Saint cranks that are being used a lot at this moment by the pro riders. This lightweight BMX crankset has been developed with Shimano’s HOLLOWTECH II technology and integrates the bottom bracket to create a super stiff construction for optimal power transfer. This crankset has a 4-arm spider and a reinforced pedal/crank interface by using a steel t-nut threaded bushing. It has a single front chainring (34/38/41/42/43/44/46T) that’s compatible with Shimano’s 9-speed HG chains. This crankset will be available in following crank lengths: 165, 170, 175 and 180mm.
The hubs HB-MX70 and FH-MX70 have been developed with super smooth angular contact bearings. The freehub features a super quick engagement for fast power transfer which is of vital importance in this sport where winning or loosing is being decided in a matter of seconds. The hubs will be available in 32 and 36 spoke hole versions. The freehub carries single sprockets with 14, 15, 16 or 18 teeth.
Finally a DXR rear V-Brake and a 2-finger left and right hand side brake lever will be available (for rear brake only). The brake features cartridge brake shoe holders and offers powerful and reliable stopping power in all conditions.
These specific Shimano BMX racing components provides for a worry-free and reliable set-up, for racing to the max.
Availability in the market : December 2006