Add accurate, race-proven power data to your gravel or road bike without buying a whole new crankset. This SRAM Apex AXS power meter upgrade hides Quarq's proven measurement tech inside a 172.5mm DUB WIDE left crank arm and spindle, so you simply swap in this assembly and keep training to watts.

Highlights

  • 172.5mm left crank arm with an integrated DUB-PWR power meter spindle
  • Measures left-side power to calculate your total watts
  • Long 400+ hour battery life from a user-replaceable AAA lithium battery
  • IPX7 waterproof rating (1 metre for 30 minutes) for all-weather riding
  • Adds less than 40g over a standard crankset
  • Pairs with the SRAM AXS app and ANT+/Bluetooth head units

Proven power, hidden away

The power meter electronics live inside the DUB spindle rather than on the spider or arm, keeping the look clean and stealthy while delivering the reliability and accuracy Quarq is known for. It reads left-leg power and doubles it to report your total output, giving you a consistent number to train and pace with.

What you get

This is an upgrade assembly: it includes only the left crank arm and the power meter spindle. The right crank arm, bottom bracket, spider and chainrings are not included, so it is intended to drop into an existing compatible SRAM DUB WIDE setup.

Compatibility and fit

Crank length: 172.5mm. Designed for SRAM's 12-speed Apex AXS WIDE platform with a DUB spindle interface. Works with all SRAM Road WIDE DUB bottom brackets (except Ai). Confirm your existing right arm, spider and bottom bracket are SRAM DUB WIDE before fitting.

SRAM/Quarq power meters are covered by a two-year warranty against defects in materials and workmanship from the date of original purchase. The warranty does not cover damage from misuse, neglect, improper installation, or normal wear.

For any warranty claim or support, please return the item to Tune Cycles and we will manage the process on your behalf.

  • SRAM Apex AXS left crank arm and power meter spindle assembly (D1)
  • Crank arm length: 172.5mm
  • DUB-PWR spindle measures left-side power for total wattage
  • 12-speed compatible
  • DUB spindle interface
  • User-replaceable AAA lithium battery, 400+ hours life
  • IPX7 waterproof (1m for 30 minutes)
  • Less than 40g heavier than a standard crankset
  • Compatible with all SRAM Road WIDE DUB bottom brackets (except Ai)
  • Right arm, bottom bracket, spider and chainrings not included
BrandSRAM
ModelApex AXS Power Meter Crankarm Upgrade
PartPM-APX-ASSY-D1
Crank Arm Length172.5mm
Speeds12-speed
MeasurementLeft-side, calculates total power
Spindle InterfaceDUB
Bottom Bracket CompatibilityAll SRAM Road WIDE DUB BBs (except Ai)
BatteryUser-replaceable AAA lithium
Battery Life400+ hours
WaterproofingIPX7 (1m for 30 minutes)
Added WeightLess than 40g vs standard crankset
IncludesLeft crank arm and power meter spindle only
SKU PSI-SR003018346003
Model # 003.018.346.003
Barcode # 710845886331
Brand SRAM

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