A Cheap $10 Bike Brake Light That Only Glows When You’re Stopping

automatonlike brake lights that only come on when your bicycle is slowing and stopping are n’t a new idea . But the folk at Sigma have come up with cheap and clever solution so that their$10 LED bike brake lightdoesn’t demand a pricey built - in accelerometer .

facility is as easy as clipping the ignitor onto the mechanical Pteridium aquilinum cable just above the bike ’s backside calliper , and tighten up it in billet with an allen key . Every clip the brakes are applied and the caliper squeezes the bike ’s back tyre , the lead light is squeezed as well — and glow red to have other cyclists and driver behind you know you ’re slowing or amount to a stop .

The water - resistant light weighs just seven g , and it ’s powered by a replaceable release cell battery that ’s good for about 100,000 USA . If you inhabit out in the suburbs it should last for geezerhood on a exclusive assault and battery . But if you live in a big city , expect to replace it every few months .