Apex sits at the entry point of SRAM's 12-speed Flattop road and gravel lineup, but the chain itself doesn't cut corners to hit the price. The Apex Flattop chain uses the same construction as the Rival and Force chains, with a polished grey finish being the primary visual difference between tiers. If you're running an Apex AXS or mechanical Apex 12-speed drivetrain and need a replacement chain, this is the direct spec — and it works just as well as an affordable option on higher-tier Rival and Force builds.

Flattop refers to the shape of the outer link plates, which sit flat on top rather than following the traditional dished profile. That geometry lets SRAM build a narrower chain to fit the tighter cog spacing of their 12-speed cassettes, and it also increases the contact area between the chain and cog teeth. The practical result is a quieter drivetrain, more durability, and higher tensile strength than the 11-speed chains it replaced in the SRAM lineup.

Compatibility is the thing to get right before ordering. This chain runs on SRAM 12-speed road and gravel Flattop drivetrains — Apex, Rival, Force, and Red AXS on the road side, plus the 12-speed gravel groupsets in that family. It will also work on the 13-speed Red XPLR gravel system. It is not the same as a T-Type Eagle Transmission chain from the mountain bike side, and it won't work with Shimano, Campagnolo, or SRAM's older 11-speed road drivetrains. The roller and link geometry is specific to the Flattop platform.... Read More