We introduced using 7075 T6 aluminum for sprockets to BMX in 2002 with the Tree Original sprocket, well back then it was just called the Tree sprocket. At the time people had to change their 6061 sprockets every few months. I now see photos quite often from people that have been running the same sprocket for 6+ years. It is currently the strongest sprocket available. The sprocket is machined in a way that removes material from the triangle shaped holes that is not needed and leaves the material necessary to form a structure of high strength to weight. With a classic looking design that has a timeless appeal. This sprocket uses Spline Drive a technology I developed when trying to improve the way sprockets are attached to cranks. We did not patent the design. (oops!) Although now many companies made good copies of our design I don’t believe any are as good as ours. The teeth have been modeled after the tooth shape used for industrial machinery. In industrial situations this engineered tooth shape keeps machinery running quietly and smoothly at very high RPM’s. For BMX it makes it the smoothest running sprocket. Also the teeth are made tall to prevent the chain from derailing. SPECS 1/4″ thick 7075 T6 CNC machined aluminum Heat Treated drive splined insert for 3/4″ spindle cranks 1/8″ wide teeth WEIGHT 22t 3.1oz/87g
