Over the past couple of years, I converted my commuter from a triple, to a double, then recently, to a 1×9 with a Paul Chain Keeper. It’s a simple drivetrain that works quite well for how I use it. The one remaining question was what to do about a chainguard. After a couple of weeks riding the new set-up, the answer that presented itself was not at all what I expected: a 1×9 with a Paul’s Chain Keeper does not require a chainguard. That’s right; with the Paul installed, no matter how hard I try, I cannot catch my pant leg in the sprocket. And when combined with a super clean chain lube, grease marks are a thing of the past as well, even without a cuff strap. Pretty cool for such a simple set-up.