LTWOO eR7 2x12s / 2x11s Road Electronic Hydraulic Disc Brake Groupset

The reviewer is installing the LTWOO eR7 groupset on a bike build and comments on several aspects of the installation process. He notes that the L2 (LTWOO) documentation, both text and YouTube tutorials, is genuinely good. He describes the front derailleur installation as relatively simple, with a helpful illustration on the unit showing chainring positioning. He highlights a well-designed adjustment screw on the brake levers, accessible through a recessed notch using an Allen key, allowing the lever to be loosened or tightened. The hydraulic brake line connection uses a barb/pin, olive, and threaded fitting, which he notes are usually included with the groupset. He bleeds the brakes using an Easy MTB kit from AliExpress with mineral oil. After assembly, he reports that shifting works front and rear, and braking functions, though he initially struggled with a rubbing brake that he could not get rub-free using common tricks.

The reviewer mentions the LTWOO eR7 groupset as the component chosen for his new road bike build, noting that it is the second-largest cost item after the frame. He explains that he already uses an LTWOO EGR electronic gravel groupset on his gravel bike and chose LTWOO again for the road build, selecting the ER7 over the ER9 and ERX because all three are technically identical, with the ER9 and ERX only offering more carbon. He describes the ER7 as a 2x setup with a front derailleur and rear derailleur, and notes it was purchased as a set that could optionally include a cassette, though he chose to source the cassette separately.

The reviewer does not explicitly name the LTWOO eR7 groupset in the transcript, but he describes using an electronic groupset with an app for fine-tuning gears. He mentions that during a longer ride, a couple of gears did not engage properly, so he opened the L2 app on his phone, shifted into the problematic gears, and fine-tuned them via the app. He calls this a clear advantage of an electronic groupset over a mechanical one. He also notes that the brakes performed with zero problems after proper bedding-in, with very direct braking power, and that the 160mm rotors are excellent for the price. He reports no noise, rattling, creaking, or other issues even under hard efforts approaching 1000 watts.

The reviewer chose the LTWOO eR7 electronic groupset for a budget road bike build to retain electronic shifting. They praise its appearance, features, and price, but note some missing components and a wired/wireless hybrid design.