I have a brand-new bike with Sram i3 installed, which is a 3-speed gear hub with coaster brake. The coaster brake has a good feel of modulation, but in order for it to engage braking, I will need to freewheel (not pedalling) for a bit (single digit meters?), and then I can engage the braking with a little back kick. If I pause forward pedalling immediately without coasting a bit and try to brake, I noticed I will need to back press almost half-a-rev before the braking is in effect.
Is this to be expected? Or if there's anything I need to do to tune the coaster brake for the situation to improve? I don't know if I can always manage to find some distance to prepare for the brake.
There is a front rim brake available though.