Changing chainring size when shortening cranks

Lee,

Thanks for the RideLogic bike setup consultation. Two rides in with the new bar and I’m definitely adjusting, but it’s a way different feel than it used to be. Really liking it, and a lot of moves feel easier (as long as my legs are up for it). I’ve obviously taken a deep dive here, so why not dive all the way.

My next thing I’m looking at is crank length. You talk about switching from 30 to 28 teeth for a switch from 175 to 165. I’m considering going to 155. I currently have a 32 tooth and 170, I believe. How many teeth would I need for a 155mm crank?

Thanks,

Hi Ben,