Best Mountain Bike Cassettes of 2026

Nickel-plated steel cogs, a steel lockring, and sprockets that have been cut away and drilled to save grams without losing stiffness: the HG50 is the least clever cassette here, and that's the pitch. Nothing about it depends on a new standard, a special tool or a particular frame.

The 11-36T spread is the sweet spot for a 2x10 or a strong rider on 1x10. Thirty-six teeth paired with a 30- or 32-tooth ring will get you up most rolling trail climbs, and the gaps stay close enough that you're shifting one gear at a time on undulating ground rather than jumping two. That fine spacing is also why it suits a cadence-sensitive rider more than a pure hill hunter.

It isn't light, and it isn't meant to be. Sixteen ounces of nickel-plated steel is what buys the wear resistance, and the plating is what stops the cluster rusting through a wet winter of commuting. On a bike that does double duty, trails at the weekend and errands all week, that's the combination we keep coming back to.

At the budget end of this guide sits the HG400, an 11-32T nine-speed cassette in alloy steel, 400 grams, with a plain silver finish. It's the direct replacement for whatever cluster came on the bike, and it doesn't pretend to be anything more.

The 32-tooth low gear is the part that earns its place. On a 2x9 or 3x9 bike it's the difference between spinning up a loose climb and stalling halfway, and it's a step up from the 28-tooth low gears that were common on 9-speed mountain bikes. You get that without changing chain length, derailleur or shifters.

What we like is that it asks nothing of the rest of the bike. Same lockring, same splines, same derailleur adjustment you already know. If you're chasing range rather than repair, though, this isn't your cassette, because a 32-tooth low gear on a 1x9 leaves you short on genuinely steep ground, and the wide-range picks here go to 42 and 51 for exactly that reason.

The number on the box is 51 teeth, but the interesting part of the CS-M5100 is what happens between the cogs. The spread runs 11, 13, 15, 18, 21, 24, 28, 33, 39, 45, 51, which keeps the top three tightly spaced for flat and rolling ground and saves the big leaps for the bottom of the range, where you're already standing and grinding.

That's the same low gear as the 12-speed SRAM here, and it matters most if your bike is 11-speed: you get the bailout without changing shifters, chain or frame. Check your derailleur's maximum cog rating first, because 51 teeth is past what most road and older trail derailleurs will clear, and a cage that's too short will rub no matter how carefully you set the b-gap.

Weight is where you pay for it. Steel cogs on an aluminum carrier is the right material choice for something that spends its life in grit, but at 1.5 pounds this is the heaviest cassette in this guide. You feel it when you lift the wheel, not when you ride it, and the cogs are the reason to accept that.

Paired with a 32- or 34-tooth chainring, the 51-tooth cog changes what an 11-speed bike is willing to climb. Pitches that used to be a hike-a-bike become a slow seated grind, and the chain stays put through the shift under power. It's the simplest way we've found to modernize an older 1x11 trail bike without touching the rest of the drivetrain.

An old hardtail with a 28-tooth low gear is a bike you end up pushing, and the CS-HG200 is the part that fixes it. The 12-32T spread keeps a 12-tooth top cog for the flat and gravel sections and hands you a 32 at the other end, which is the gear that turns a steep dirt road back into something rideable.

Two practical notes before you order. The zinc phosphate plating is there to stop the cogs rusting through a wet winter, and at this end of the price range that matters more than shaving grams. And if your rear wheel takes an 8- or 9-speed cassette, a 7-speed cluster needs a spacer behind it to sit tight; without one the cogs will rock no matter how hard you torque the lockring.

Seven speeds means wide gaps, so you'll always be slightly between gears on rolling ground. That's the format, not this cassette. For the money, this is the least expensive way in this guide to make an old bike climb again, and on a bike that's worth a new chain more than it's worth a new drivetrain, that's the whole argument.

Ten-speed bikes are where wide-range gearing gets awkward, and the CS-M4100 is the cheapest fix in this guide. The 11-42T spread puts a 42-tooth bailout on a drivetrain that probably shipped with a 36 at best, so a steep fire-road climb stops being a walk.

Everything else about it is deliberately ordinary. It comes in at 454 grams and takes the same shape as the cassette it replaces, so there's no adapter and no drama at the workstand. What decides whether it shifts cleanly is the derailleur: 42 teeth needs a rear derailleur rated for that cog and a hanger that's genuinely straight, and a wide cassette is unforgiving of a bent one.

For a 1x10 build with a 30- or 32-tooth ring, this is the range that makes the conversion worth doing. It weighs the same as the other 10-speed in this guide and gives you six more teeth at the low end, which is a trade we take every time on a trail bike.

The HG51 is an 8-speed 11-28T cassette, which tells you most of what you need to know. It's a like-for-like replacement for the cluster on older mountain bikes and hybrids, built with Shimano's Hyperglide ramps and a bright silver finish that cleans up well against a scuffed frame.

Where it asks something in return is the low gear. Twenty-eight teeth is tall, and on a 29er with a 32-tooth ring you'll be out of the saddle on anything genuinely steep. If your riding is rail trails, rolling singletrack or a commute with one hill at the end, that's a trade you never notice, and the close steps are the reward: you're always in a usable gear.

The ramps are the part worth watching. Hyperglide's shaped teeth let the chain climb to the next cog while you're still turning the pedals rather than waiting for you to back off, and that's the difference you feel on a climb when you've misjudged your gear. Fitting is the standard job: lockring tool, chain whip, a few minutes.

If you're replacing an 8-speed cassette on a bike that works, this restores the shifting the bike had and adds nothing to think about. If your reason for shopping is that the low gear isn't low enough, no 11-28 will fix that — the 12-32 Tourney is the one to look at instead.