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Overview

Why Is the Shimano Altus CS-HG31 a Practical 8-Speed Cassette for Budget MTB Builds?

The Shimano Altus CS-HG31-8 is an 8-speed MTB cassette built on Shimano's HYPERGLIDE platform, delivering reliable indexed shifting with the specially positioned shift ramps and tooth profiles that define Shimano's cassette shifting performance. The wide 11-34T gear spread gives riders a genuinely usable low gear for steep climbs without requiring any mechanical compromise elsewhere in the drivetrain, making it an effective choice for recreational MTB and hybrid builds on tighter budgets.

Compatible with all Shimano 8-speed MTB drivetrains. Requires a standard Shimano 8-speed freehub body and an 8-speed chain.

All the specs

MPN ECSHG318134

Model
CS-HG31
Speed
8-speed
Range
11-34T
Technology
HYPERGLIDE
Groupset match
Shimano Altus
Compatible
All Shimano 8-speed MTB drivetrains

FAQ

Good questions

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What gears does this 11-34T cassette have?

Shimano lists the cogs as 11-13-15-17-20-23-26-34T. The large 34T cog gives budget builds a real climbing gear without requiring higher-spec components.

Is the CS-HG31 compatible with Shimano Acera and Alivio 8-speed drivetrains?

Yes. The CS-HG31-8 is compatible with all Shimano 8-speed MTB drivetrains including Altus, Acera, and Alivio.

What chain should I pair with the CS-HG31?

Use a Shimano 8-speed chain such as the CN-HG71 or CN-HG40 for correct shifting performance.

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