LTWOO eRX Road Electronic Groupset, eRX 2x12s / 2x11s Electronic Groupset, ERX Replaceable Battery, APP Programming

This electronic groupset offers excellent rear shifting performance and extensive app customization at a significantly lower price than competitors, but has noisy front shifting, requires non-standard brake adapters, and is best suited for confident self-installers.

Pros

Rear shifting is fast, reliable, and crisp
Extensive app customization including speed configuration and per-sprocket micro-adjustment
USB-C charging via front mech with universal charger compatibility
Good battery life comparable to Shimano Di2

Cons

Front shifting is noisy, clunky, and slow
Brake calipers require non-standard adapters for most flat mount frames
Heavier weight comparable to Shimano 105 level
Shifter hood rubber is stiff compared to Shimano

Key Facts

Configurable as 2x11s or 2x12s via app
Semi-wireless design with shifters connecting wirelessly to mechs
USB-C charging port located on front mech

Reviews & Ratings

Tom Bowers Cycling on YouTubeabout 2 months ago

I Ditched Dura Ace for Ltwoo ERX. Was It a Mistake?

00:22:55

Watch on YouTube

I Ditched Dura Ace for Ltwoo ERX. Was It a Mistake?

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).