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Choice Day x Love Delivers
Reviews & Ratings
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AI-Summary
The reviewer purchased and installed the LTWOO ERX (referred to as L2, L2 V3, L2 ERX, and ERX) electronic groupset on a winter training bike, replacing Dura Ace Di2. They tested it for approximately 5 months. The reviewer states the rear shifting is fast, reliable, and crisp, comparable to other electronic groupsets. The front shifting is noted as noisy, clunky, and slow, reminiscent of older generation products. The app offers extensive customization, including selecting 11 or 12-speed operation and micro-adjusting individual sprockets, but the initial setup was challenging with a default Chinese language setting. The groupset uses a semi-wireless design with USB-C charging via the front mech, which is praised, and battery life is reported as good. The brakes require non-standard adapters for flat mount frames, which the reviewer dislikes. The groupset is significantly heavier than Dura Ace, comparable to Shimano 105. The price is a major advantage, coming in considerably cheaper than Shimano 105 Di2 when factoring in additional drivetrain components. The reviewer concludes it is a solid competitor to 105 Di2 for tinkerers and self-builders, but has compromises compared to top-tier groupsets.
AI-Summary
Pros
- Rear shifting performance is fast, reliable, and crisp.
- Extensive app customization: can be set to 11 or 12-speed, micro-adjust individual sprockets.
- USB-C charging via the front mech is convenient and uses a universal charger.
- Good battery life, on par with Shimano Di2.
- Semi-wireless installation is as easy as Shimano's system.
- Powerful brake bite and easy bleeding (mineral oil).
- Good shifter ergonomics, better than old SRAM eTap.
- Significantly cheaper than Shimano 105 Di2.
- Looks good on the bike, doesn't look cheap.
Cons
- Front shifting is noisy, clunky, and slow, not on par with Dura Ace.
- Brake calipers use a non-standard mount requiring ugly adapters for most flat mount frames.
- The groupset is heavy, comparable to Shimano 105 level, not lightweight.
- Shifter hood rubber is stiff compared to Shimano.
- No auxiliary buttons or satellite shifter compatibility on shifters.
- App was initially in Chinese, requiring guesswork to change language.
- Setup instructions are less documented than major brands, requiring tinkering.
- Potential fragility of the 4-pin cables.
- Past generations had water ingress issues (reviewer did not experience this).
- Lack of support from bike shops, only suitable for confident self-installers.
- Cannot configure shifters for Shimano's 'multi-shift' setup (one button up/down).
Key Points
- Model: LTWOO ERX (also called L2 V3, L2 ERX).
- Type: Semi-wireless electronic groupset.
- Speeds: Configurable via app as 2x11s or 2x12s.
- Charging: USB-C port on the front mech.
- Battery: Replaceable, good battery life.
- App: Allows speed configuration, micro-adjustment per sprocket, and calibration. No physical limit screws on front mech.
- Compatibility: Uses mineral oil brakes. Shifters are wireless, mechs connect via cable to battery.
- Weight: Much heavier than Dura Ace, similar to Shimano 105.
- Price: Paid approx. £350 for shifters, mechs, brakes, battery, and cables.
Where to Buy