Blog / Cycling Gear / Drivetrain
Best Road Bike Cassettes and Cranksets 2026
Our Top Gearing Upgrades
Quick Comparison
| Product | Best for | Budget tier | Buy |
|---|---|---|---|
| Shimano Ultegra CS-R8101 12-Speed Cassette, 11-34T | 12-speed road bikes that need an easier low gear | Under $250 | Amazon → |
| Shimano 105 CS-R7000 11-Speed Cassette, 11-32T | 11-speed road bikes on a budget | Under $50 | Amazon → |
| Shimano Deore CS-M5100 11-Speed Cassette, 11-51T | Gravel and hybrid bikes with a mountain-bike derailleur | Under $100 | Amazon → |
| Shimano 105 FC-R7100 12-Speed Crankset | 12-speed road bikes that need a new crankset | Under $250 | Amazon → |
| Shimano Ultegra FC-R8100 Crankset | Riders upgrading a 12-speed Ultegra or 105 setup | Under $500 | Amazon → |
| Shimano GRX FC-RX810-1 1x Crankset | Gravel riders going to a single chainring | Under $500 | Amazon → |
Tiers show the price band when this page was updated, not a quoted price.
The bike gearing calculator tells you the ratios of your current cassette and chainrings. This page covers what to buy when the answer is "I need an easier low gear" or "I need a smaller jump between gears." Cassette and crankset are the two parts that set your range. Before you buy anything, count the speeds on your drivetrain (9, 10, 11 or 12), because the cassette, chain, shifters and rear derailleur must all match.
Shimano Ultegra CS-R8101 12-Speed Cassette, 11-34T
This is the cassette to choose if you already run 12-speed Shimano road shifting. The listing gives an 11-34T range across 12 cogs, HYPERGLIDE+ technology for shifting under load, an HG road cassette body, and compatibility with 11-speed and 12-speed road freehub bodies. With a 52/36 crankset it gives a low gear ratio of about 1.06.
- ✓ 11-34T, 12 cogs
- ✓ HYPERGLIDE+ technology
- ✓ HG 11/12-speed road freehub body
- ✓ Low gear about 1.06 with 36T chainring
- ✓ Check that your shifters and derailleur are 12-speed
Shimano 105 CS-R7000 11-Speed Cassette, 11-32T
The 105 R7000 is the sensible cassette for an 11-speed bike. The listing describes nickel plated steel cogs on an aluminum carrier, a steel lockring, shift ramping and tooth profiles that mirror Ultegra and Dura-Ace, and 11-28, 11-30 and 11-32 options. With a 50/34 crankset the 11-32 gives a low gear ratio of about 1.06.
- ✓ 11-speed, 11-32T option
- ✓ Nickel plated steel cogs, aluminum carrier
- ✓ Includes steel lockring
- ✓ Also sold in 11-28 and 11-30
- ✓ Low gear about 1.06 with 34T chainring
Shimano Deore CS-M5100 11-Speed Cassette, 11-51T
The 11-51T Deore cassette is the widest range on this list. The listing gives cog sizes of 11, 13, 15, 18, 21, 24, 28, 33, 39, 45 and 51, an HG freehub type, steel cogs and an aluminum carrier. It needs a rear derailleur with enough capacity for the 51T cog, so check yours first. With a single 42T chainring the lowest gear ratio is about 0.82.
- ✓ 11-51T, 11 speed
- ✓ HG freehub type, includes lockring
- ✓ Steel cogs, aluminum carrier
- ✓ Low gear about 0.82 with a 42T ring
- ✓ Check derailleur capacity before you buy
Shimano 105 FC-R7100 12-Speed Crankset
The 105 R7100 crankset is the core of a 12-speed 105 drivetrain. The listing describes hollow aluminum crank arms with a gloss black anodized finish, a Hollowtech II spindle interface, a 110 asymmetric BCD chainring design, and compatibility with an HG 12-speed chain and 135/142 road disc hubs with a 44.5 mm chainline. Choose arm length and chainring size (50-34 or 52-36) to match your bike and legs.
- ✓ Hollow aluminum arms, Hollowtech II spindle
- ✓ 110 asymmetric BCD
- ✓ For HG 12-speed chain, 44.5 mm chainline
- ✓ 50-34T and 52-36T options
- ✓ Pick the right arm length for your bike
Shimano Ultegra FC-R8100 Crankset
The Ultegra FC-R8100 is the step up. The Amazon listing shows a 2-speed crankset with hollow aluminum cranks, a Hollowtech II spindle interface and a 52/36T chainring set, in several arm lengths. With an 11-34 cassette the 52/36 gives a lowest gear ratio of about 1.06 and a highest of about 4.73.
- ✓ 52/36T chainrings
- ✓ Hollow aluminum cranks, Hollowtech II
- ✓ 2-speed (double) crankset
- ✓ Several arm lengths
- ✓ High gear about 4.73 with an 11T cog
Shimano GRX FC-RX810-1 1x Crankset
The GRX FC-RX810-1 is a single-ring gravel crankset. The listing gives aluminum arms in 170, 172.5 and 175 mm, 42T or 40T chainrings, a 110 x 4 asymmetric BCD and Hollowtech II spindle interface, for 11-speed. With a 42T ring and an 11-34 cassette, the low ratio is about 1.24, and with an 11-51 cassette it drops to about 0.82.
- ✓ Single ring, 42T or 40T
- ✓ Arm lengths 170, 172.5 and 175 mm
- ✓ 110 x 4 asymmetric BCD
- ✓ Hollowtech II spindle interface
- ✓ 11-speed
Gear Ratio Math: What Each Combination Gives
A gear ratio is the chainring teeth divided by the cog teeth. Lower ratios make hills easier. Higher ratios give you a bigger top speed. Here is how the combinations on this page compare. You can check your own in our bike gearing calculator and compare gear inches in the gear inches chart.
| Chainrings | Cassette | Lowest ratio | Highest ratio |
|---|---|---|---|
| 50/34 | 11-32 | 1.06 | 4.55 |
| 50/34 | 11-34 | 1.00 | 4.55 |
| 52/36 | 11-34 | 1.06 | 4.73 |
| 1x 42 | 11-34 | 1.24 | 3.82 |
| 1x 42 | 11-51 | 0.82 | 3.82 |
A ratio of 1.0 means the wheel turns once for each turn of the cranks. Below 1.0 the wheel turns less than once per pedal revolution, which is the easiest territory for steep climbs. At the other end, a 1x setup with a 42T ring and an 11T cog tops out at 3.82, lower than a 52T double at 4.73, which is the trade-off of going to a single ring.
Compatibility Checklist Before You Buy
- Speeds must match. A 12-speed cassette needs a 12-speed chain, shifters and derailleur. An 11-speed set cannot take a 12-speed cassette.
- Freehub body. The Shimano HG cassettes here fit HG freehub bodies. SRAM XDR and Campagnolo bodies take different cassettes.
- Derailleur capacity. A wider cassette needs a rear derailleur that can wrap the chain across the largest cog. A cassette with an 11-51T range needs a mountain-bike derailleur.
- Chain length. Changing the cassette or chainrings can change the chain length you need. Use our bike chain length calculator.
- Crankset standards. Check the bottom bracket, the spindle interface and the chainline. The 105 FC-R7100 lists a 44.5 mm chainline for 135/142 road disc hubs.
- Use a shop for the first swap. Cassette and crank swaps need a chain whip, lockring tool and torque wrench. Park Tool and other makers sell them, or ask a local shop.
Which Upgrade Fits Your Problem
- "Hills are too hard." Change the cassette first. Going from an 11-28 to an 11-34 is the cheapest fix. If your derailleur cannot take a bigger cog, the crank may be the next step.
- "I spin out on descents." A larger chainring (52 or 53T) raises your top gear. A 1x setup limits it.
- "The jumps between gears feel big." A narrower cassette, like an 11-28 or 11-30, has smaller steps. See our cadence and speed calculator for how gear choice changes cadence at your target speed.
- "I ride gravel." A 1x crankset with a wide-range cassette simplifies shifting and is lighter on maintenance.
Related Gear
Replacing a drivetrain wears the new parts against old ones, so replace the chain with the cassette. See our wet vs dry chain lube guide for upkeep, bike multi-tools and workstands for the tools, and power meters if you want to measure how a gearing change affects your watts.
Frequently Asked Questions
What is the best cassette for climbing?
For a 12-speed road bike, the Shimano Ultegra CS-R8101 11-34T is a good choice. For gravel and hybrid bikes with a mountain-bike derailleur, the Shimano Deore CS-M5100 11-51T is the widest range on this page. Check your derailleur capacity first.
Can I put an 11-34 cassette on my road bike?
Often yes, if your rear derailleur has enough capacity for a 34T cog and the cassette matches your speeds and freehub body. Check the derailleur model and its stated maximum cog.
Do I need to change the chain with a new cassette?
It is a good idea. A worn chain can wear a new cassette quickly, so replace both. If you change cassette size you may also need a different chain length.
Is 1x better than 2x for road bikes?
1x is simpler and lighter on maintenance, and suits gravel. 2x gives smaller gear steps and a wider range, so most road riders keep a double. It depends on your terrain.
What gear ratio is easy for steep hills?
A ratio near 1.0 or below is easy for steep climbs. A 36T chainring with a 34T cog is about 1.06. A 42T chainring with a 51T cog is about 0.82. Use the gearing calculator to check yours.
Do these parts work with SRAM?
Not as a mix. Shimano HG cassettes fit HG freehub bodies and Shimano shifting. SRAM drivetrains use their own cassettes and derailleurs, so match the brand and speeds across the system.