Shimano
Deore XT M770 9-Speed Cassette
Best durable upgrade for mountain bikers running 9-speed drivetrains.
Experience reliable performance with the Shimano Deore XT CS-M770 9-Speed Cassette. Engineered for 9-speed drivetrains, it offers a versatile 11-34t gear range suitable for various terrains. The integrated aluminum carrier design not only reduces weight but also enhances rigidity for precise and consistent shifting, even under demanding conditions. Built to the durable Deore XT standard, this cassette ensures dependable performance for cyclists who push their limits, making it a great choice for challenging rides.
$89.99
More Deore XT Options
Owner Satisfaction
4.7
/ 5
Category Rank
68
/ 2100
#68 in Components
Price vs Category Average
-13%
Below average
Weight
323.032
/ grams
Who it's for
- High-mileage riders seeking long-term component reliability
- Cyclists prioritizing smooth and consistent shifting performance
- Weight-conscious riders wanting a balance of stiffness and mass
Who should skip it
- Modern cyclists building bikes with current drivetrain standards
- Mountain bikers tackling steep terrain needing wider gear ratios
- Weight-obsessed racers looking for the lightest possible drivetrain
Performance breakdown
Shifting Precision
Aluminum carrier design ensures crisp, reliable gear changes under heavy load.
Weight Efficiency
Smart material usage keeps the rotating mass impressively low for climbing.
Component Durability
Legendary XT-level construction stands up to years of aggressive trail abuse.
Gear Range Versatility
The 11-34t spread handles steep climbs and fast flats with ease.
Drivetrain Compatibility
Standard spline interface makes installation seamless across most legacy wheelsets.
Structural Rigidity
Stiff construction prevents power loss during high-torque pedaling efforts.
Key Specs
Weight
323.032 grams
Drivetrain Speeds
9
Range
11-34t
Cassette Cogs
11-13-15-17-20-23-26-30-34
Freehub Body Compatibility
Shimano/SRAM 8, 9, 10 Speed
Material
Aluminum carrier
Installation Required
Yes
Features
- Lightweight aluminum carrier construction
- Enhanced rigidity for precise shifting
- Optimized for 9-speed drivetrains
- Wide 11-34t gear range
- Deore XT level durability
- Reliable performance on varied terrain
What customers say
Users consistently praise the Shimano Deore XT M770 Cassette for its exceptional durability and robust construction. This component is recognized as a benchmark for 9-speed drivetrains, reliably handling thousands of miles across varied terrain without performance loss. A key theme is the precision of its shifting; riders appreciate the crisp, smooth gear changes experienced even under load, contributing to an efficient ride. While the initial investment is noted, the overwhelming consensus is that the superior quality and remarkable longevity fully justify the cost. For those committed to 9-speed systems, this cassette is viewed as the gold standard, offering unwavering functionality and instilling confidence on any ride.
Know before you buy
Yes, the CS-M770 is designed specifically for 9-speed systems. It is compatible with standard Shimano and SRAM 8, 9, and 10-speed freehub bodies.
The aluminum carrier reduces the overall weight of the cassette while increasing structural rigidity. This extra stiffness helps ensure that your shifts remain precise and consistent, even when you are putting significant power through the pedals.
With an 11-34t gear range, this cassette provides a low enough gear to handle most steep, technical climbs comfortably. It is a versatile choice for riders who encounter varied terrain and need a reliable range for both climbing and descending.
The 11-34t configuration features the following cog progression: 11-13-15-17-20-23-26-30-34. This spacing is optimized to provide smooth transitions between gears during your ride.
Yes, you will need a standard cassette lockring tool and a chain whip to properly install or remove this cassette. If you are not comfortable performing drivetrain maintenance, your local bike shop can handle the installation quickly.
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