The city I grew up in and used this kind of bike just fine in has ~70m height difference between the hilly parts and the flat parts.
Sure, you won't be able to cycle up to the Zugspitze with it, but for cycling in a regular hilly town it's enough, 7 gears are fine and the brakes are good enough as well.
Sure, you won't be able to cycle up to the Zugspitze with it, but for cycling in a regular hilly town it's enough, 7 gears are fine and the brakes are good enough as well.