Reviewed catalog recordAvailability unknown

Sun Race Sturmey-Archer Inc.; owner-authorized licensed use.

CSMZ903 WA1 Cassette

MZ 12-Speed Wide-Ratio · 12-Speed, 11-51T, HG, Black Chrome

Category: Cassette/freewheel
Model year: Year not published
Market: Global
Variant key: 11-51t-hg-black-chrome

Exact variant

Published identity and context

Weight

Unknown

No supported weight context is published for this variant.

SKU

Unknown

Manufacturer part number

CSMZ903 WA1

Catalog revision

1

Specification schema 1

Materials

Material information is unknown.

Published colors

Color information is unknown.

Also known as

No public aliases are recorded.

Schema version 1

Structured specifications

Sprocket count: 12; Manufacturer identifies the cassette as 12-speed. Source: https://sunrace.com/product/csmz903-wa1-5/
Material: Alloy spiders with A7075 aluminum large sprockets and a black chrome finish

Manufacturer-listed cassette construction. Source: https://sunrace.com/product/csmz903-wa1-5/

Claimed weight

497 g

Manufacturer-listed weight. Source: https://sunrace.com/product/csmz903-wa1-5/

Attributed statements

Compatibility context

These are source-backed manufacturer statements for this exact variant, not fitment advice or a compatibility guarantee.

No compatibility context are published for this exact variant.

Canonical stock records

Bicycles listed with this component

These links reflect reviewed stock specifications. They do not guarantee compatibility with another size, market, year, or personal build.

No reviewed bicycle stock specification currently links this exact component.

Provenance

Evidence and freshness

Sources current

The listed evidence is available and has not been marked stale.

Identity
SunRace (opens in a new tab)
Fresh
Checked Oct 12, 2026
Review
Accepted
Confidence
Verified
Market
Global
Source type
Product Page
Evidence note: Owner-reviewed official evidence for SunRace CSMZ903 WA1 Cassette.
Classification Availability
SunRace (opens in a new tab)
Fresh
Checked Oct 12, 2026
Review
Accepted
Confidence
Verified
Market
Global
Source type
Product Page
Evidence note: Owner-reviewed official evidence for SunRace CSMZ903 WA1 Cassette.
Frame Fork Material
SunRace (opens in a new tab)
Fresh
Checked Oct 12, 2026
Review
Accepted
Confidence
Verified
Market
Global
Source type
Product Page
Evidence note: Owner-reviewed official evidence for SunRace CSMZ903 WA1 Cassette.
Weight
SunRace (opens in a new tab)
Fresh
Checked Oct 12, 2026
Review
Accepted
Confidence
Verified
Market
Global
Source type
Product Page
Evidence note: Owner-reviewed official evidence for SunRace CSMZ903 WA1 Cassette.
Component Attributes
SunRace (opens in a new tab)
Fresh
Checked Oct 12, 2026
Review
Accepted
Confidence
Verified
Market
Global
Source type
Product Page
Evidence note: Owner-reviewed official evidence for SunRace CSMZ903 WA1 Cassette.

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Exact-variant experience

Ratings and written reviews

Reviews here apply only to SunRace CSMZ903 WA1 Cassette · 12-Speed, 11-51T, HG, Black Chrome. They are separate from comments on cyclist journeys and user-owned bicycles.

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