SRAM Cassette
3 models, 4 verified variants. Only rows checked against SRAM’s own page are listed.
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec. A cell marked not stated is a field the maker does not publish, so nothing here checks it.
| Model | Variants | Speeds | System | Freehub | Minimum cog | Maximum cog | Price (MSRP) |
|---|---|---|---|---|---|---|---|
| SRAM PG-1231 | 1 | 12-speed (rear index count the maker rates it for) | Drivetrain system sram-apex-mech-12 | / driver hg-road | Smallest cog 11 teeth | Largest cog 44 teeth | $135.00 |
| SRAM XG-1251 | 2 | 12-speed (rear index count the maker rates it for) | Drivetrain system sram-xplr-12 | / driver xdr | Smallest cog 10 teeth | Largest cog 44 teeth | $175.00 to $260.00 |
| SRAM XG-1391 | 1 | 13-speed (rear index count the maker rates it for) | Drivetrain system sram-xplr-13 | / driver xdr | Smallest cog 10 teeth | Largest cog 46 teeth | $460.00 |
Source for every row: SRAM’s own product pages, last checked between 2026-07-18 and 2026-07-22.
The checker compares the dimensions listed in what we check, and what we don’t. “No conflicts found” means no conflict among those dimensions — not a guarantee that a build works. Errors mean it won’t fit; warnings mean it works but check; infos are notes.