The Quarq DFour is for Shimano chainrings. The added cost on my bike is tossing the current 24mm spindle and buying the GXP 24/22 spindle.
Save yourself the headache and avoid Vectors. Mine went back 3 times before getting a full refund from garmin. Now I have assiomas and they are worlds better.
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Its a shame too because arguably the Vectors look WAY better, and have a better cleat, but that’s all useless if they don’t work.