The finish line is near, the “flamme rouge” is in sight… Today will be the installation of the SRM/LOOK Tri-Lobe inside the Origin Powermeter and the Dura Ace pedals. Then only a few little things to go.

Post as guidance? No warranty in ANY case of damage!

As said during the crank installation the SRM/LOOK Powermeter features a Tri-Lobe Design which makes it possible to choose three different length: 170 / 172.5 / 175

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The weight on the tri-lobe parts is 29.9grams which is quite heavy but maybe necessary.  The material is anodized steel. The Dura Ace pedals hit the scale with 233.9grams, that’s ok.

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Now for the preparation of the tri-lobe parts. Every side is marked (left/right) and consists of two parts: the tri-lobe inlet and the plate.

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The SRM manual dictates a dry fit but I noticed a creaking noice during wet conditions from the tri-lobe/pedal section. So I switched to a “tighten fit” with carbon paste. This will lead to a strong fitment and prevents creaking.

Long term experience
I ran this combination for quite a half year without any problems. Only downside on this is to remove the tri-lobe the “easy way”. Because of the carbon paste this is a really strong boundary. To loosen it I inserted an old pedal axle and wiggle the tri-lobe out.

After covering the crank arm with a small amount of carbon paste the tri-lobe can be inserted. My choice is 172.5mm. The cover plate also indicates the chosen crank length.

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The pedals must also be prepared. Anti-seize on the threads prevent locking and corrosion.

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Last step is the pedal installation itself. Remember: Left pedal clockwise, right pedal counter clockwise.

Torque on both pedals should be around 20-40NM for the SRM Origin Carbon Powermeter Crank.

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And its done…

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