... . 2.450g/pc 3.strong. 4.700c road Item: 700c road bike carbon rims with alloy brake, strong!!!!Depth: ... wheels. This can be fine for triathlon and time trials but too abusive for longer rides and races ... basalt resin. when riding, especially for a long time downhill riding, the wheels generate lots of heat, ... that would be a big problem for the safe bike activity. Luckily, basalt, a good material to ...