Top-tier electronic shifting components now in a value-packed version, what is there not to love The new SRAM GX Eagle Transmission drivetrain uses a new T-Type chain with a flat top to maximize shifting performance. Solid pins enhance durability and are durable enough to be used with an E-mountain bike and the extra torque produced by those systems. This new T-Type chain is only compatible with SRAM's new Transmission drivetrains.