The RM01 spider is not a flat stamping. It is a three-dimensional radial structure machined out of a solid aluminium block. Material that carries no load is gone; what remains is placed where the braking force actually travels. That is the RADIAL family DNA, shared with the RT01Z: rotating radial structures, carved, not cast.

A 3D structure does two things at once. Removing volume from the spider cuts rotating mass, so the wheel spins up and slows down with less effort. The open structure exposes far more surface to airflow than a solid disc, so heat leaves the rotor faster on long descents. Two results, one geometry.

The RM01 uses the 6-bolt interface, so it fits the hubs found on MTB, gravel, folding and many road wheels. The Japanese SUS-410 stainless braking track is fixed to the European 7075 aluminium spider in a two-piece construction, available in 160, 180 and 203 mm, and the spider comes in six colours to match JuinTECH calipers and levers, or your frame.

Pair it with GTP, GTF, F1, R1 or M1 calipers and the braking system reads as one piece.