Comment by tchvil

If you like to tinker, buy a frame from Decathlon. Install a Bafang motor. Get Onirii MT4 brakes. Both are available on AliExpress. Use a 200mm front disc and 180 rear disc. Get a wheelset with a Sturmey-Archer hub, or normal wheels with a robust Shimano 9-speed transmission. And you have a very decent e-bike for around 1600€