nothing wrong with a single brake I've been doing it for about 2 months now just have to be more aware of the surroundings but I've been now toying with going with a front brake I found a dual brake that's cheaper than the one that's been suggested but yet compatible to use on a rear brake light and it's a throttle brake assembly I have the throttle part already assembled on my bicycle just need to buy that part now to set up my front brake for a faster slow down also on a side note the thumb throttle reacts faster and is more reliable than a Twist grip I've had one Jam six times in a row