GOLDIX M240 28H Boost MTB Hub 36T Ratchet Straight Pull Center Lock HG XD MS 110x15 148x12 10-12 Speed Bicycle Wheel Hub

GOLDIX M240 Boost MTB Hub

28H Straight Pull · 36T Helical Ratchet · Center Lock · HG / XD / MS

The GOLDIX M240 is designed for XC and mountain bike applications, featuring a lightweight 28H straight-pull structure, Boost axle spacing and an upgraded 36T helical ratchet system for stable and responsive power transmission.

Product Specifications

Brand: GOLDIX

Model: M240

Application: MTB / XC

Front: 110 × 15mm Boost

Rear: 148 × 12mm Boost

Spoke Holes: 28H

Spoke Type: Straight Pull Steel Spokes

Brake Type: Center Lock

Freehub Options: HG / XD / MS

Ratchet: 36T Helical Engagement

Bearing Brand: SS

Front Bearings:

17287 × 2

Rear Bearings:

Hub Shell: 6902 × 2

Freehub Body: 6802 × 2

Maximum Single-Spoke Tension: 2500N

Water & Dust Protection: IP42–IP53

Freehub Options

HG – For compatible HG-type cassette systems

XD – For compatible XD-type 11–12 speed systems

MS – For compatible MS-type 12-speed systems

HG / XD / MS are different cassette interfaces and are not interchangeable.

Please confirm your cassette specification before ordering.

New 36T Helical Ratchet System

The new M240 ratchet system features an optimized helical engagement structure.

Compared with a conventional 36T flat ratchet of similar weight and tooth count, the new design increases the effective engagement area by approximately:

+38% Engagement Area

The larger contact surface helps improve:

Load distribution

Engagement stability

Power transmission

Wear resistance

Long-term durability

Lower Stress Concentration

Under a simulated 230 N·m torque load, the optimized ratchet structure reduces peak stress from approximately:

630 MPa → 480 MPa

Equivalent to an approximate:

32% reduction in peak stress

This helps reduce localized load concentration on the ratchet engagement surfaces.

Helical Guided Engagement

The optimized tooth geometry guides the two ratchet engagement surfaces into contact more smoothly and precisely.

Main advantages:

Faster engagement response

Reduced rotational free play

More direct power transfer

Smoother engagement

Improved alignment

Self-Centering Design

The helical engagement geometry provides a self-centering effect during operation, helping the ratchet remain aligned around the hub axis.

This reduces engagement offset and improves operating stability under repeated pedaling loads.

Weight Notice

Please refer to the product weighing images.

Due to production batch differences and manual measurement, actual product weight may vary by approximately ±10g. By placing an order, you acknowledge and accept this normal weight tolerance.

Important Compatibility Notice

Before ordering, please confirm:

110 × 15mm Front / 148 × 12mm Rear / 28H Straight Pull / Center Lock / HG-XD-MS Freehub / Boost Frame & Fork Compatibility

Incorrect specifications may result in installation failure.