Powermeter voor Shimano Tiagra, 105 en Ultegra – alle geschikte cranks voor de Forto powermeter

Powermeter for Shimano Tiagra, 105 and Ultegra – all compatible cranks for the Forto powermeter

Anyone looking to install a power meter on a Shimano groupset often encounters the same question:

Will a power meter work on my Tiagra, 105, or Ultegra crank?

In this guide, we'll explain exactly which cranksets are compatible, which generations work, and why the Forto power meter fits almost all Shimano Hollowtech II systems.

What determines compatibility?

The most important factor is not the groupset, but the type of crank interface.

Shimano uses the Hollowtech II system for almost all modern road groups. You can recognize it by:

  • Integrated axle in the right crank arm
  • External bearings
  • Left crank arm with two pinch bolts

Do you have this system? Then your crank is essentially suitable for a power meter like Forto.

Shimano Tiagra – compatibility by generation

Tiagra is often the entry-level groupset for which there seem to be few power meter options. However, most modern Tiagra cranks are compatible.

Compatible (Hollowtech II):

  • Tiagra 4700
  • Tiagra 4600

Not compatible (older systems):

  • Tiagra 4500 and older (Octalink system)

Conclusion:
If you use Tiagra 4700 or 4600, you can install a power meter without modifications.

Shimano 105 – compatibility by generation

Shimano 105 is the most commonly used groupset and is entirely based on Hollowtech II.

Compatible:

  • 105 R7000
  • 105 R7100 (12-speed)
  • 105 5800

All these cranksets work with the same interface and are suitable for power meters.

Shimano Ultegra – compatibility by generation

Ultegra follows the same standard as 105, but with lighter and stiffer components.

Compatible:

  • Ultegra R8000
  • Ultegra R8100
  • Ultegra 6800

Again, all the above cranksets use Hollowtech II and are compatible.

Shimano Dura-Ace – compatibility by generation

Dura-Ace is Shimano's top-tier groupset and uses the same Hollowtech II standard.

Compatible:

  • Dura-Ace R9200
  • Dura-Ace R9100
  • Dura-Ace 9000

These cranksets are also fully compatible with power meters like Forto.

Overview: which cranks work?

In summary, these are the main compatible Shimano cranksets:

Tiagra

  • 4700
  • 4600

105

  • R7100
  • R7000
  • 5800

Ultegra

  • R8100
  • R8000
  • 6800

Dura-Ace

  • R9200
  • R9100
  • 9000

As long as your crank is from these series and uses Hollowtech II, you're good to go.

Which cranks don't work?

Older systems without Hollowtech II are not compatible, such as:

  • Square taper
  • Octalink (on older Tiagra and 105)

These are mainly found on older bicycles.

Why the Forto power meter works on these cranks

The Forto power meter is designed for the Shimano Hollowtech II standard. As a result:

  • It fits multiple generations simultaneously
  • No new crankset is needed
  • Installation remains simple
  • It works with both entry-level and high-end groupsets

This makes it possible to train with power even with Tiagra or older 105/Ultegra generations, without expensive upgrades.

Conclusion

For power meters, it's not about the groupset's name, but the standard behind it.

If you use a Shimano crank with Hollowtech II, it will work with:

  • Tiagra (4700 / 4600)
  • 105 (5800 / R7000 / R7100)
  • Ultegra (6800 / R8000 / R8100)
  • Dura-Ace (9000 / R9100 / R9200)

The Forto power meter makes it possible to use all these systems without modifications.

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