"Car back!"
If you've ever been on a group bike ride, you've no doubt heard these two words shouted by a nearby rider. It's also the name of Trek's new bike radar.
For safety-conscious cyclists, bike radars have been a game-changer. Usually mounted on the seat post, the radar units alert cyclists to cars approaching from behind. While they will work on any bike on any road, bike radar is most useful in suburban and rural settings. After all, if you're doing some urban bike commuting, you'll just assume cars are behind you because that's how it is. But on more open roads with higher speed limits or free-flowing traffic, bike radars are fantastic.
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