Brake-Lock 3-Speed Internal Gear Hub For Shared Bicycles
LG-N3019-3G is the M03 fork-out manual 3-speed internal gear hub for shared-bicycle and fleet projects using the 2715 Brake Lock direction. Its 135 mm O.L.D., 49 mm and 44 mm chainlines, 3.74 mm offset and 21.8 / 36 mm axle-from-hub dimensions provide a defined rear-wheel integration basis.
The hub retains the common M03 186% range. Gear 1 supports low-ratio starts and climbing, Gear 2 provides the direct ratio, and Gear 3 provides the high-ratio direction for manual urban riding.
The 2715 Brake Lock relationship is the primary difference on this page. It should be treated as a project integration direction rather than a generic brake or remote-lock claim. Locking function, control method, supplied lock parts, communication and complete-vehicle behavior remain subject to the approved brake-lock specification.
The outside-fork shift-control assembly provides the mechanical connection point for the project-confirmed M03 shifter. The brake-lock system and shift-control system must be reviewed separately and then validated together within the rear-wheel design.
- 2715 Brake Lock model direction for shared-bicycle rear-wheel projects.
- Manual 186% three-speed range with 0.73 / 1.00 / 1.36 ratios.
- 135 mm O.L.D. and 49 / 44 mm chainlines.
- External shift-control layout for cable-actuated manual selection.
- 189.5 mm axle, 36H and 0.9 kg shared M03 fork-out data.
- IPX6 and RoHS / REACH confirmed public fields.
| Parameter | Specification |
|---|---|
| Model | LG-N3019-3G |
| Product Type | M03 Fork-Out Manual 3-Speed |
| Speed / Range / Ratios | 3 Speed / 186% / 0.73 / 1.00 / 1.36 |
| Brake Direction | 2715 Brake Lock |
| Matched Shifter | Project Confirmed |
| O.L.D. / Axle | 135 mm / 189.5 mm |
| Chainline G1 / G2 / Offset | 49 mm / 44 mm / 3.74 mm |
| Axle From Hub L / R | 21.8 mm / 36 mm |
| Thread / Wheel Build | JIS BC3/8-26 / #13-#14 / 3 mm / 36H |
| Color / Weight | Silver / 0.9 kg |
| Temperature | -30-80 C / -40-85 C |
| Waterproof / Certification | IPX6 / RoHS / REACH |
The internal planetary gear system supplies the three transmission ratios. Rider input travels through an approved shifter and cable to the outside-fork control, which selects the internal ratio. The exact shifter model and adjustment method must be confirmed for LG-N3019-3G before production.
LG-N3019-3G is positioned for shared bicycles, rental bicycles and managed fleet platforms where a brake-lock rear-hub direction is part of the vehicle architecture. The page does not establish fleet service life, remote locking, anti-lock behavior, mountain-bike use or universal vehicle compatibility.
Before sampling, confirm the 135 mm frame, 2715 Brake Lock specification, chainline, axle geometry, wheel build, shifter, cable route, lock-control boundary and intended operating environment.
IPX6 and RoHS / REACH are confirmed for LG-N3019-3G. Brake-lock lifecycle, locking tests, fleet cycles, environmental validation and production inspection limits require the approved 2715 and project documentation; they must not be inferred from generic factory media.
Q: What is the 2715 Brake Lock? A: It is the confirmed brake-lock direction for LG-N3019-3G. Its detailed function, control method and supplied parts follow the project specification.
Q: Is this an automatic gear hub? A: No. Gear selection is manual and mechanically cable-actuated.
Q: Is the brake lock supplied with the hub? A: The included-component scope must be confirmed in the quotation.
Q: Which shifter should be used? A: The exact M03 manual 3-speed shifter is confirmed during project matching.
Q: What should a fleet customer provide? A: Frame drawing, 135 mm O.L.D., brake-lock specification, chainline, wheel build, shifter/control requirements, cable route and operating scenario.
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