Eagle Transmission 1987 Welcome Guide

Big hair. Bold colors. Silver drivetrains.

You’ve just stepped back in time, when “Never Gonna Give You Up” was topping the charts, mountain bikes were rigid, and SRAM was born. Fast forward to today and you've got something just as iconic: the extremely limited 1987 edition Eagle Transmission. It’s a nod to the roots of mountain biking, equipped with the most advanced technology SRAM has ever created. Welcome to 1987.

This guide will walk you through the essentials of your Eagle Transmission, from installation to battery basics. Get the most from your ride.

Step 1: Installation

The 1987 Collection features all the same components as Eagle Transmission and follows the same easier-than-ever installation process. Set it up our way, then ride it your way.

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Step 3: Know your chain length and setup key

Eagle Transmission derailleurs feature no adjustment screws. Instead, the system relies on a few simple specifics to get the perfect setup. Your bike model and chainring size combination have a defined chain length, as well as a specified Setup Key position and Setup Cog that must be used.

You can calculate these specifications using the Chain Length & Setup Key Calculator, which has a database of most bike models that are compatible with Eagle Transmission.

The Chain Length & Setup Key Calculator can be found below, as well as in the SRAM AXS App.

Calculate now

Tech tip: If you change your chainring size or adjust your bike’s geometry with a flip-chip, you must verify your new settings in the Chain Length & Setup Key, adjust as necessary, and reperform the derailleur setup process.

Step 4: Pairing is painless

Pairing introduces your components to each other with a wireless handshake, so they form a secure and seamless group. If your system is set up and shifting well, it’s already paired.

Tech tip: Pairing a complete AXS system takes seconds. Start with the rear derailleur (or Flight Attendant Control Module, if applicable), then pair all components—including seatposts and controllers—into a single system.

Setup checkpoint

Make sure all your AXS components are paired by checking that they show up under your bike profile in the app, or by using your controllers to actuate each AXS component. If any component is missing, repeat the pairing process.