Skip to main content

What power meter will fit my Shimano SLX MTB crankset?

There are several power meters that will work a Shimano SLX MTB crankset:


Left Crank Arm Power Meter

For Shimano SLX 7100 cranks:

4iiii PRECISION Power Meter For Shimano XT M8100/8120
Stages Shimano XT M8100/8120 Power Meter

These power meters are left side crank arms. You simply use them in replace of your existing crank arm. Installation is quick and easy.

Please note, the color of these crank arms won’t match your SLX exactly (a cosmetic issue only), but most customers are ok with this.

Please also note, whenever you are installing a left side power meter crank arm, you need to confirm you have 10mm of clearance between the left crank arm and the chainstay in order for the sensor to clear. Please see the image below.

The clearance between the frame and left side power meter crank arm

Pros: Affordable, easy to install, don’t have to change crankset
Cons: Measures left leg power only


Right Crank Arm Power Meter

Stages Shimano XT M8120 Driveside Power Meter

Some bike frames are not able to fit a left side crank arm power meter like the ones above as there is not sufficient frame clearance for the power sensor. However, Stages Cycling makes a right side version that will fit all frames. Please note that this is a XT crank arm (Stages doesn’t make SLX right arms), however it will fit your SLX perfectly – the color of the XT arm is just a bit different. Also, please note the right side versions cost a bit more than the left side crank arms, but this is because they also come with new chainrings.

Pros: Affordable, easy to install, don’t have to change crankset
Cons: Measures right leg power only


Spider Power Meter

These power meters are compatible with Shimano MTB direct mount cranksets using a 1x chainring such as the M7100. In addition, because they are spider-based power meters, they measure power from both legs.

Please note, the power2max uses a 104 BCD chainring configuration. So you will need a power2max compatible MTB chainring as well.

Pros: Moderately priced, VERY reliable, don’t have to change crankset, measures both legs
Cons: None


Power Meter Pedals

MTB power meter pedals can be installed on any MTB crankset. We have both the Garmin Rally XC and the SRM X-Power.

Pros: Easy to install, works on any bike, can move from bike to bike, don’t have to change crankset
Cons: None


Crankset Power Meter

Stages Shimano XT M8120 Dual-Sided Crankset

Of course, you can also choose to replace your crankset entirely for a new one. These cranksets are move expensive but then a left or right side crank arm, but they measure both from both the left and right leg.

Pros: Accurate, reliable, measures both legs
Cons: More expensive, more work to install

Power Meter City

Shopping Cart