The oversized version of BSD's Dropped stem. The Stacked OS stem features BSD's gorilla grip system which has a larger 25.4mm clamping diameter to work with Oversized handlebars. The stem clamping area diameter is increased from 7/8" (22.2mm) to 1" (25.4mm). This increase in diameter gives 14% more clamping area than on regular 7/8" handlebars, so when you're nose diving down a 12 set your bars are less likely to slip, BSD OS Gorilla Grip system. ###section### Product Specs TYPE: Front Load REACH: 50mm RISE: 10mm CLAMPING DIAMETER: 25.4mm WEIGHT: 320g (11.32oz) Colour: Polished, Black