Similar to traditional drop bars, those measurements reference the width of the bars from hood to hood. The Corner Bar comes in three widths: 46, 50, and 54cm. The horns and drop diameter is 22.2mm to work with mountain shifter and lever clamps. Surly probably went that route to keep costs down and to provide a little more flex and compliance for comfort. The Corner Bar has a 25.4mm clamp area that requires a shim for most modern mountain bike stems. These are welded onto a single straight bar that has forward bends at either end to simulate the hood curve. It has two ~200mm bars that each have a single bend to make the dominant “in the drops” hand positions. black finish, and is constructed out of three pieces of tubing. The Surly Corner Bar is made from custom-butted 4130 CroMoly steel, coated with an E.D. So that’s one of the ideas here-how do we make it easier and less costly to convert?” Surly Corner Bar Construction and Geo And the clamp size on a mountain handlebar and a road handlebar are different, so the levers don’t even fit the bars. “You have to buy shifters, brake levers, sometimes a new derailleur-because none of them are compatible. “If you have a mountain bike setup with a flat bar and you want to convert it to a drop bar, it’s not an easy or cheap conversion,” explains Surly’s Brand Manager, Paul Zeigle. The Surly Corner Bar was created to help make the switch easier. Plus, many of the road/gravel drivetrains lack good low gearing. And, yeah, you can always toss one of the dozens of wild gravel-specific drop bars on your mountain bike, but that’ll likely mean needing to buy new shifters, controls, and other components if your parts bin is running low. And of course, with some tweaks to the stem length-typically a shorter stem, because mountain bikes are generally longer-saddle position, and other such adjustments, it’s possible to convert almost any hardtail or rigid mountain bike to a drop-bar rig. Either way, we get a lot of questions about such conversions. The latter might be a little more applicable to those who come from a road cycling background. I suppose the answer in most cases would simply be, “Why not?” Otherwise, there are probably a lot of people experimenting with hand positions for the sake of comfort, or perhaps trying to make their bike feel as good riding to the trails as it does once on them. Why would anyone want to put drop bars on a mountain bike? Good question. ![]() Drop Bars on a Mountain Bikeįirst things first. We’ve been playing with one for a few weeks for this review. But the Corner Bar is quite unique in that it’s created for one purpose: converting a mountain bike to a drop-bar rig without having to switch the drivetrain and controls. In typical Surly fashion, the Corner Bar is constructed out of steel, and like the Moloko, it certainly isn’t the most svelte bar on the block. Their latest creation might just take the cake, however. The riser/drop Truck Stop Bar and the ever-popular Moloko alt mountain bike bar are just a couple of examples from the handlebar department. Creating wonderfully weird and unique bike components isn’t anything new for Surly.
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