SRAM RED AXS E1 1x 12-Speed 50T DUB Power Meter Crankset

The SRAM RED AXS E1 1x power meter crankset builds the power meter into a 50T aero X-Sync chainring, on hollow carbon arms with a SRAM DUB spindle. SRAM rates it accurate to +/-1.5% and it measures left/right leg balance.

Six lengths from 160 to 175mm are offered in Natural Carbon. It's aimed at 12-speed road, triathlon and cyclocross bikes; the bottom bracket is sold separately.

Who It's For

• Triathletes, time trialists and road riders on SRAM 12-speed 1x who train with power
• Riders who want left/right balance data
• Frames with 130mm or 135/142mm road disc hubs and a DUB bottom bracket
• Consider a different crank if you need lower 1x gearing or a 2x setup

What to Look For

• Spindle interface: SRAM DUB, bottom bracket not included.
• Chainring: 50T aero, with the power meter integrated into the ring.
• Length: 160, 165, 167.5, 170, 172.5 or 175mm.

Key Features

Hollow carbon arms use a new construction that SRAM says is 29g lighter than the last generation.

The SRAM DUB spindle needs a separately purchased DUB bottom bracket that matches your frame.

SRAM integrates the power meter into the chainring for lower weight and accuracy, rated at +/-1.5% and unaffected by temperature. It measures right and left leg balance.

The 50T X-Sync aero ring holds the chain on a 1x setup and suits flat, fast courses. Chainline is 45mm.

Rider Intent Summary

• Biggest strengths: Dual-sided balance data, an aero 50T ring and light carbon arms in one crank.
• Tradeoffs: The ring and power meter are one unit, the 50T ring is tall for hills, and the bottom bracket is extra.
• What makes it different: It is a 1x aero power meter crank, which few road cranks offer.

Victory's Take

We recommend this crank to triathletes who want accurate power on a clean 1x bike. Victory Bicycle Studio can set your length from your fit and confirm the DUB bottom bracket.

Specifications

• Brand: SRAM
• Model: RED 1 AXS Power Meter Crankset E1
• Power meter: Chainring-integrated, left/right balance, +/-1.5% (SRAM rating)
• Chainring: 50T aero X-Sync, direct mount
• Chainrings: 1x, chain-retaining single
• Drivetrain speeds: 12
• Spindle interface: SRAM DUB
• Chainline: 45mm
• Hub compatibility: 130mm hubs; 135/142mm road disc hubs
• Crank lengths: 160, 165, 167.5, 170, 172.5, 175mm
• Arm material: Hollow carbon fiber
• Color: Natural Carbon
• Pedal thread: 9/16"
• Intended use: Road, tri, cyclocross
• Bottom bracket: Not included