HUB RATCHET
With 68 engagement points, a 38% increase over our MKII wheelsets, it ensures power is transferred to the road the moment you demand it.
RIDER BENEFIT:
THE REDESIGNED HUB RATCHET IN THE PARTINGTON PERFORMANCE AND PERFORMANCE Ti WHEELSETS ENSURES EVERY WATT OF PEDALING POWER TRANSFERS DIRECTLY TO THE ROAD.
TECHNOLOGY OVERVIEW:
The R-Series wheelsets introduce our highest-performance ratchet system to date, engineered around three core components: a higher-density engagement point array, a helical drive interface, and an oversized face-tooth ratchet design.
Available in both Steel and Ti-Ceramic variants, providing the customer with optionality based on the rider’s needs. Our new ratchet system is compatible with SRAM, Shimano, and Campagnolo N3W drivetrains.
ENGAGEMENT POINTS:
The system delivers 68 engagement points, a 38% increase over our MKII wheelsets.
Higher engagement density reduces the rotational distance — measured in degrees
— between the moment a rider applies force and the moment that force is transmitted through the hub. This narrows the window of “dead travel” in the pedal stroke.
HELICAL DRIVE SYSTEM:
The ratchet uses an oversized face-tooth profile rather than a traditional pawl-and-ring layout. Distributing load across a larger tooth surface reduces contact stress per engagement point, which allows for a higher tooth count without sacrificing durability. This is the design factor that makes the 68-point engagement figure possible.
FACE-TOOTH RATCHET DESIGN:
The ratchet uses an oversized face-tooth profile rather than a traditional pawl-and-ring layout. Distributing load across a larger tooth surface reduces contact stress per engagement point, which allows for a higher tooth count without sacrificing durability. This is the design factor that makes the 68-point engagement figure possible.
APPLICATION:
In practice, this combination of high engagement density and helical loading has the most measurable effect in scenarios involving repeated, rapid power application: standing starts, sprint efforts, technical climbs, and terrain requiring frequent micro-adjustments in cadence or torque. In these conditions, reduced engagement lag means power delivery more closely matches rider input in real time. On sustained, steady-state efforts, the benefit is less about immediate engagement and more about consistent, low-drag freewheeling over distance.
SERVICEABILITY:
The entire ratchet mechanism is contained within the freehub body. This isolates the ratchet from the hub shell during disassembly, allowing freehub replacement or inspection without further breakdown of the hub internals.
