Which Power Meter Fits A Specialized Crankset?

By : Mr Mamil
Updated :

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Specialized S-Works Crankset
2018 Specialized S-Works Crankset

Looking for power meter options for your Specialized or S-Works crankset?

There are two options;

  • Spider-based
  • Pedal-based

In this article, we’ll explore the three options in detail.

Spider-based power meters

Quarq DZero for Specialized
Quarq DZero for Specialized crankarm
ComparisonPower2max NG RoadPower2max NGeco RoadQuarq DZeroSigeyi AXO
Accuracy±1%±2%±1.5%±1.5%
BCD*110, 130110, 130110, 130110
Battery typeRechargeableCR2450CR2032Rechargeable
Battery lifeup to 150hup to 300h200 hours120 hours
Warranty2 years2 years2 years2 years
Price**$940$390$760$338
Spider-based power meters for Specialized crankset

Four spider-based power meters fit a Specialized/S-Works crankarm;

  • Power2max NG Road is a top-of-the-line model from Power2max with ±1% accuracy and a rechargeable battery.
  • Power2max NGeco Road is a mid-range and more affordable option with ±2% accuracy and uses a CR2450 coin battery.
  • Quarq DZero is compatible with all carbon Specialized and S-Works crankarms from 2013 to 2018. It’s not compatible with the dual-sided S-Works Power Cranks.
  • Sigeyi AXO is a newcomer to the power meter space. It’s priced very competitively at $338 and has similar features to the top-of-the-line Power2max NG Road.

All models, except the Sigeyi AXO have an option for 110 or 130 BCD. You can reuse the existing 5-bolt chainring and only swap out the non-power meter spider.

More reading : Power2max NG Road vs NGeco Road Comparison

Pedal-based power meters

For pedal-based power meters, you can choose between;

  • Garmin Rally RS (Shimano) or RK (Look)
  • SRM Exakt
  • Favero Assioma

Pedal-based power meters are the easiest to install by just swapping out the existing pedals.

ComparisonGarmin RallySRM ExaktFavero Assioma DuoFavero Assioma Duo-Shi
Accuracy±1%±2%±1%±1%
Weight (pair)320g to 326g310g303gvaries**
ConnectivityANT+, BLEANT+, BLEANT+, BLEANT+, BLE
BatteryLR44/SR44RechargeableRechargeableRechargeable
Battery Life120 hours30 hours50 hours50 hours
Cleat typeShimano SPD-SLLook KeoLook KeoShimano SPD-SL
Pedal stack13.5mm10.5mm10.5mmvaries***
Q-factor53mm54mm54mm64/65mm****
Warranty1 year2 years2 years2 years
Price$1100 (dual)
$650 (left)
$1300 (dual)
$750 (left)
$759 (dual)
$495 (left)
$659 (dual)
Pedal-based power meters comparison for Specializeds crankset

Notes :

  • * Weight – Garmin Rally RS200 (320g), Rally RK200 (326g), Rally RS100 (160g), Rally RK100 (163g)
  • ** Weight depends on the Shimano pedal body used. The spindles weigh 198g/pair and 314g/pair when used with a Shimano R8000 pedal body.
  • *** Pedal stack depends on the Shimano pedal body used.
  • **** Q-factor – 65mm (Shimano R8000/R6800), 64mm (R550/R540)

Garmin Rally

Garmin Rally RS200 Power Meter
Garmin Rally RS200 Power Meter

The Garmin Rally is the latest power meter by Garmin, with four models.

  • RS200, dual-sided, Shimano SPD-SL cleats
  • RS100, left-sided, Shimano SPD-SL cleats
  • RK200, dual-sided, Look Keo cleats
  • RK100, left-sided, Look Keo cleats
More reading : Garmin Rally RS200 Review

SRM Exakt

SRM Exakt Power Meter
SRM Exakt Power Meter

The SRM Exakt is an SRM power meter built into a Look Keo pedal. It’s available in single-sided (left) or dual-sided options.

Favero Assioma

Favero Assioma Duo Power Meter
Favero Assioma Duo Power Meter

The Favero Assioma is available in three variants;

  • Assioma Duo, dual-sided, Look Keo cleats
  • Assioma Uno, left-sided, Look Keo cleats
  • Assioma Duo-Shi, dual-sided, Shimano SPD-SL cleats

The Favero Asisoma Duo-Shi is sold with pedal spindles only and without a pedal body. You’ll need to use an existing Shimano pedal and install it on the Favero Assioma Duo-Shi.

Compatible pedal bodies are the Shimano PD-R8000, PD-R7000, PD-6800, PD-R550, and PD-R540.