An 11-28T gear range covers a lot of ground without the big jumps between cogs that wider-range cassettes require. The Shimano HG-400 in this configuration runs 11-12-13-14-16-18-21-24-28, which means tight 1-tooth steps through the gears you'll use most often on flat and rolling terrain, then progressive jumps as you move into climbing territory. For road riding, fitness cycling, or commuting where you're not facing mountain grades, that 28-tooth bailout gear handles moderate climbs while keeping shift quality smooth across the cassette.

This is an Alivio-level cassette that Shimano positions for mountain, trekking, and city applications, but the 11-28T ratio works equally well on road bikes running 9-speed drivetrains. The HG-400 replaced the older HG50-9 and HG61-9 cassettes with a design that saves roughly 11% in weight through larger hollow sections in the cog stampings. Drilled cogs and a nickel-plated steel construction contribute to the weight savings while adding corrosion resistance for wet-weather durability. If your current cassette has worn teeth or you're noticing chain skip under load, this is a direct replacement that restores crisp shifting without upgrading your entire drivetrain.

Hyperglide technology handles the shifting. Computer-designed ramps and tooth profiles on each cog guide the chain directly to the next sprocket without override, which translates to fast, positive index shifting when paired with any 9-speed HG chain. The cassette slides onto standard Shimano or SRAM 8/9/10-speed freehub bodies and locks down with the included nickel-plated steel lockring. Installation uses Shimano's CS cap system for quick assembly without loose cogs to manage during the swap.... Read More