Yes, it goes in to regen mode anytime the front brake is activated. It also has 4 different levels of regen that can be used on long descents (it assists as a brake in that case to aid in deceleration.) I don't believe that the regen function is super efficient. I'm a lot more interested in "going" than "stopping." But yes, the regenerative braking function is there if it's an important selling point for buyers.