People assume way too much about gearboxes and belts. Do not judge until your ride one. The reports you read about the drag or gripshift appear to be mostly from people who haven't ridden a gearbox bike and are just repeating what they heard. I have a gearbox bike with a belt drive, 155mm cranks. Full suspension with idler and tensioner. So lots of added "drag" beyond the gearbox itself. It's a big enduro bike that gets used for bike parks and shuttle laps too. I've beat it to hell and back for the last 3 years, broken frames, bent...