MAS is more, and not just when translated from Spanish! MAS stands for Micro Adjust Spider. This technology allows you to very finely adjust the set-up your Q-ring, offering you not just the 5-way adjustability of the Q-ring itself, but a possibility to micro adjust your spider as well.
The Rotor 3D+ MAS crankarms have been hollowed out along the length of the arms, using the unique and patented Trinity Drilling System. This allows the crank to maintain its rigidity while shedding weight.
• Ultra rigid 30 mm aluminium UBB axle compatible with BSA, ITA, BB86, BB30, BB30 PF, BBRight and BB386 Evo frames
• Suitable for 10- and 11-speed groupsets
• 3D+ crankset sold without chainrings and bottom bracket bearings