BMX stem is always a task how to design and product nice thing. The stifness always fight with less weight. As completelly CNC machined, this was starting project for 34R BMX company. It flew into longtime design period of success cooperation with very smart mind of 34R main person Kamil Feifer.
Design and construction of BMX cranks is always tricky because of stifness & strenght and overall perfomance. The same important is weight and endurance. But the most important is success of welding process. These cranks were designed as a set with hollow axle. Designed and made from CrMo steel with using of hollow CNC machined blocks. Welded and heat treated.
Bottom bracket bearings for BMX bike. This system is specially designed on special request for fading-stop of cranks turning while biker is doing tricks. Thatswhy we used friction bearings with specially counted and tested tolerances. The result is less weight and better performance.