BuildMyMTB
Prototype - Evolving Daily

SRAM Rear Derailleur

5 models, 6 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.

ModelVariantsSystemSpeedsActuationMaximum cogMountCagePrice (MSRP)
SRAM Apex XPLR RD1Drivetrain system sram-apex-mech-1212-speed (rear index count the maker rates it for)MechanicalLargest cog 44 teethStd-hangerxplr cage$140.00
SRAM Apex XPLR AXS RD1Drivetrain system sram-xplr-1212-speed (rear index count the maker rates it for)Axs-wirelessLargest cog 44 teethStd-hangerxplr cage$305.00
SRAM Force XPLR AXS RD1Drivetrain system sram-xplr-1313-speed (rear index count the maker rates it for)Axs-wirelessLargest cog 46 teethUdh-fullmountxplr cage$475.00
SRAM RED XPLR AXS RD1Drivetrain system sram-xplr-1313-speed (rear index count the maker rates it for)Axs-wirelessLargest cog 46 teethUdh-fullmountxplr cage$770.00
SRAM Rival XPLR AXS RD2Drivetrain system sram-xplr-12 (on 1 of 2 variants); Drivetrain system sram-xplr-13 (on 1 of 2 variants)12-speed (rear index count the maker rates it for) (on 1 of 2 variants); 13-speed (rear index count the maker rates it for) (on 1 of 2 variants)Axs-wirelessLargest cog 44 teeth (on 1 of 2 variants); Largest cog 46 teeth (on 1 of 2 variants)Std-hanger (on 1 of 2 variants); Udh-fullmount (on 1 of 2 variants)xplr cage$330.00 to $360.00

Source for every row: SRAM’s own product pages, last checked between 2026-07-17 and 2026-07-31.

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.

Check a whole gravel bike build in the builder