SRAM Eagle Transmission 1987 Limited Edition Groupset

The SRAM Eagle Transmission 1987 Limited Edition Groupset is not a colorway change. It is a curated assembly of the best components in the T-Type Ecosystem — selected to represent SRAM's engineering at its current peak — finished in an exclusive silver and produced in a run of exactly 1,987 units worldwide, one for each year since SRAM was founded. Every groupset carries its own edition number. When they are gone, that is it.

The cassette defines the weight ambitions of this kit. SRAM took the XX SL — already the lightest MTB cassette in the lineup — and shaved an additional 25 grams without changing the 10-52T range or compromising the X-Sync tooth profile that makes T-Type shifting so consistent under load. The derailleur is a deliberate hybrid: the rugged cage from the XX paired with the lightweight body of the XX SL, built around Full Mount architecture and finished in silver. It is a configuration that did not exist before this groupset. The X0 T-Type-inspired aluminum crankset comes paired with a dual-sided spider-based power meter that calculates total watts with what SRAM describes as their most accurate measurement system to date — integrated cleanly, with long battery life and no external pods. The chain carries hollow links, hollow pins, and a Hard Chrome coating for an exceptional strength-to-weight ratio. Each link bears the handwriting of SRAM founder Stan Day alongside the groupset's unique serial number — a detail that makes this a collectible as much as a drivetrain.

Two AXS Pod Ultimate Controllers with silver infinity clamps handle shifting left and right, with full Reverb AXS dropper compatibility built in. Both chainring sizes (32t and 34t) are included along with the threaded chainring removal tool, two AXS batteries, and a four-battery USB-C charger — everything needed to build and ride without sourcing additional components.

Specs at a Glance

• Edition: 1,987 groupsets produced globally — each individually numbered
• Finish: Exclusive silver throughout
• Cassette: 1987 SL edition, 10-52T, X-Sync teeth — 25g lighter than XX SL
• Rear Derailleur: 1987 edition hybrid — XX cage / XX SL body, Full Mount, AXS wireless
• Crankset: 1987 edition X0 T-Type-inspired aluminum, 170mm, with dual-sided power meter
• Chainrings: 32t and 34t 1987 edition included (threaded mount, removal tool included)
• Chain: 1987 silver edition — hollow links, hollow pins, Hard Chrome coating; Stan Day signature + unique serial number
• Shifters: 2x AXS Pod Ultimate Controllers (left + right), silver infinity clamps
• Speed: 12-speed
• Compatibility: T-Type Ecosystem, Full Mount frame required
• Included: 2x AXS batteries, 4-battery USB-C charger, chainring removal tool
• Not Included: Front derailleur (n/a), brakes, rotors, bottom bracket

Design Benefits

1. The Lightest T-Type Cassette Ever Made: The 1987 SL cassette starts from the XX SL architecture and removes an additional 25 grams — a meaningful number at the wheel where rotating mass is felt most. The 10-52T range and X-Sync teeth deliver the same shift quality that defines T-Type, at a weight SRAM has never achieved in a production MTB cassette before.
2. A Derailleur That Did Not Exist Before This Groupset: The hybrid construction — XX cage, XX SL body — balances durability and weight in a way that neither derailleur achieves alone. Full Mount architecture eliminates the hanger as a variable, and the AXS motor delivers T-Type's signature shift under load performance in silver hardware you will not find in the standard lineup.
3. Integrated Power Measurement Without Compromise: The dual-sided spider power meter measures total watts from both legs in a package that adds no visible bulk to the X0-inspired crankset. Long battery life and seamless AXS integration mean you get accurate data without managing a separate device.