The design of the 4 arm cranksets that so well identify the super record record and chorus groupsets has now found its way into this fantastic new potenza groupset although in an aluminium construction the potenza crankset is made with both left and right crank arms in hollow forged aluminium to keep weight to a minimum while maintaining the same performance characteristics of its carbon fibre counterparts potenzas 11 4 arm spider design makes for one single crankarm for all chainring opti