Can I temporarily use my (power meter fitted) left crank Shimano 105 R7000 on my old bike that has Sora FC-3550 crankset? I assume that all Hollowtech 2 cranks should be interchangeable but I am not entirely sure Sora FC-3550 is actually Hollowtech 2. There is no mention of Hollowtech 2 on Shimano's page related to the product, although it certainly does look like it is the same thing (two bolts, typical star-like pattern of the plastic cover) and Amazon lists it as "Hollowtech 2". Has anyone tried it?

1 Answer 1


It is indeed HT2. The website mentions “2 piece crank construction”, which refers to this.

It should be compatible assuming the arm length is the same and the Q-factor is the same.

  • 1
    It worked, I have been riding it for a few days. It is a temporary solution so I think I can safely ignore possible but undetectably small differences between left and right crank - stiffness etc.
    – HonzaBé
    Apr 3, 2021 at 14:09

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