Buying a crankset without chainrings sounds like a mistake until you realize how many riders end up removing the stock rings anyway — either to install a power meter spider, run a 1x setup, or match a specific chainring combination that didn't come in the box. SRAM sells the Rival AXS E1 DUB Wide Crank Arm Assembly as exactly that: the arms, spindle, and hardware, ready for whatever 8-bolt chainring or spider you plan to bolt on. This is the Wide spindle version, which gives you the 47.5mm chainline needed for gravel and all-road frames with the extra tire clearance that comes with it.

The chainline for standard spindle cranksets is 45mm, and the chainline for wide spindle cranksets is 47.5mm — a difference of 2.5mm between the two. That 2.5mm outboard shift is what makes the Wide version the right pick for gravel and XPLR builds where the rear end is spaced for bigger rubber. If your frame calls for a 47.5mm chainline, this is the assembly that matches — running the standard-width version on a Wide frame will pull your chainline off spec and compromise shifting.

The 8-bolt direct mount interface is what makes this platform genuinely modular. The 8-bolt interface is compatible with power and non-power AXS spiders and integrated chainrings , so the same crank arms can carry a Quarq power meter spider, a 1x direct mount ring for gravel, or a 2x integrated chainring pair for road duty. If your build plans might change — adding power later, swapping between 1x and 2x, moving from road to gravel gearing — the interface follows you without needing new arms.