Well you could, but it comes at a cost (in dollars, complexity and weight), and is likely not worth it since the bike still needs friction brakes. It's a diffe

Well you could, but it comes at a cost (in dollars, complexity and weight), and is likely not worth it since the bike still needs friction brakes. It's a different story with a 50 ton train where a 20 KW resistor bank is not a significant amount of weight, but adding a 500W resistor bank to a bike (since you need somewhere for energy to go when the battery is fully charged) is probably not going to be worth the weight and expense. Plus you need some sort of blending between regenerative and friction braking, so it's yet another thing that needs adjusted and maintained.