Unfortunately I can't help with measurements but since you are considering new bars anyway have you looked at randoneuring bars- also from nitto. I recently purchased a set and like you struggled with how to measure. What I like about these (which are similar to the noodles but also have the drops flared out slightly ) are that for the first time in 35 years of riding the drops are comfortable to use because of the flare. I got mine from VeloOrange but Harris also has them I believe.