LTWOO GRT 1x12s Gravel Rear Derailleur (Carbon / Alloy)

The reviewer discusses the LTWOO Hydraulic 12s GRT 1X12 Speed Gravel Bike groupset, specifically the GRT Carbon Fibre Rear Derailleur and GRT 12S Alloy Rear Derailleur. He mentions that the groupset is available in Brazil and recommends it as a good option, noting that it is electronic and reasonably priced. He shares a cautionary tale about a friend who had a pin come loose on the derailleur, but the Chinese seller provided a replacement under warranty. He advises buyers to disassemble the derailleur and apply threadlocker to prevent this issue.