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Shimano 105 R7000 left crank compatible with Sora FC-3550?

Bicycles Asked by honzzz on April 29, 2021

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?

One Answer

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.

Correct answer by MaplePanda on April 29, 2021

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