SRAM Rival AXS E1 DUB WIDE Power Meter Crankarm Upgrade

The SRAM Rival AXS E1 DUB WIDE Power Meter Crankarm Upgrade lets you add training-grade power measurement to your existing Rival AXS groupset without replacing the entire drivetrain. The power meter is housed entirely within the DUB spindle — a left-side spindle-based design that measures left-side power and doubles it to calculate total output. Installation is straightforward, and the weight penalty is under 40 grams compared to a standard crankset.

Battery life is rated at over 400 hours from a single user-replaceable AAA lithium cell, which means you can run full seasons without worrying about mid-ride dropouts or hard-to-source batteries. IPX7 waterproof construction means rain, puddles, and hose-downs are a non-issue. The upgrade is compatible with any DUB bottom bracket, so if your bike is already set up for DUB standards, this slots in cleanly without additional hardware.

SRAM Rival AXS E1 DUB WIDE Power Meter Specs at a Glance

• Measurement method: Left-side spindle-based, doubles for total power output
• Weight addition: Under 40g versus standard crankset
• Battery: Single AAA lithium — over 400 hours battery life, user-replaceable
• Water resistance: IPX7 rated
• Bottom bracket compatibility: DUB standard
• Crank lengths available: 160mm, 165mm, 170mm, 172.5mm, 175mm