I just ran mine where the big ring was. It will depend more on which end of the block you're spending most of your time in - optimise it for that.
I should probably try and have a look at some data from races and see what gear I spend most time in. Can't be that hard to work it out.
Data or just like, you know, know. :)
@Brommers started
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I just ran mine where the big ring was. It will depend more on which end of the block you're spending most of your time in - optimise it for that.