The eR7 is LTWOO’s latest electronic groupset, developed by building upon the design and production expertise gained from the eRX and eR9 models.
It features a series of major upgrades, including a newly designed motor and electronic control chip, refined software algorithms, and a shifter derived from the latest eRX V3 platform.
The rear derailleur now offers enhanced waterproofing, while the front derailleur is equipped with a USB Type-C charging port for greater convenience. Both the brake levers and rear derailleur cage are constructed from lightweight aluminum alloy, effectively reducing manufacturing costs without compromising performance.
With its blend of advanced technology, reliability, and affordability, the eR7 stands out as the best value electronic groupset in LTWOO’s current lineup.












