NONPLUS PRIMARO ULTRA M4 Hubset The NONPLUS PRIMARO ULTRA M4 Hubset represents the pinnacle of lightweight hub engineering. Designed exclusively for modern carbon threaded spoke wheelsets, the ULTRA M4 combines uncompromising weight savings with exceptional stiffness, precision, and efficiency for elite road and gravel riders. Weighing as little as 178g per hubset (SRAM XDR, 20H), the PRIMARO ULTRA M4 is one of the lightest Center Lock disc hubsets available. Every detail has been refined to minimise friction and maximise power transfer, from its ceramic Enduro bearings and low-friction coated freehub body to its optimised spoke geometry that increases lateral stiffness without adding weight. Built around the innovative M4x0.5 threaded spoke interface, the ULTRA M4 is the ultimate choice for premium carbon spoke wheel builds. Key Features Ultra-lightweight performance hubset from just 178g M4x0.5 fine-thread interface for carbon threaded spokes Optimised flange geometry for increased lateral stiffness and improved wheel durability Premium Enduro ceramic bearings for ultra-low rolling resistance Low-friction coated freehub body and ratchet components 45-tooth ratchet drive system with fast 8° engagement Straight-pull hub design for maximum spoke alignment and power transfer Center Lock disc brake compatibility Compatible with Shimano HG, SRAM XDR, Shimano Micro Spline Road and Campagnolo N3W freehub bodies Precision CNC-machined anodised aluminium construction 4-year warranty on hub shells Specifications Application: Road, Gravel, Cyclocross Front Axle: 12x100mm Rear Axle: 12x142mm Brake Mount: Center Lock Hub Design: Straight Pull Spoke Interface: M4x0.5 threaded carbon spokes Material: CNC-machined anodised aluminium Hole Count: 24H (20H available on selected configurations) Bearings: Enduro Ceramic Bearings Engagement: 45T ratchet (8° engagement) Maximum Spoke Tension: 1200N Maximum System Weight: 110kg Freehub Options: Shimano HG, SRAM XDR, Shimano Micro Spline, Campagnolo N3W Colour: Matte Black Weight: From 178g (SRAM XDR 20H) / Approx. 191g (Shimano HG 24H) Perfect For The PRIMARO ULTRA M4 is built for riders chasing the absolute lightest and fastest wheelset possible. Whether you’re racing on the road, climbing alpine passes, or building an uncompromising gravel race bike, the ULTRA M4 delivers exceptional responsiveness, minimal rolling resistance, and precision performance without compromise.
