Originally Posted by clengman

I had a pro bike fitting done a few years ago and one of the suggestions was to get a taller stem. At the time I didn't want to mess around with my handlebars so I left the stem as is. It's a quill stem with 90mm extension and 10cm length from the safe insertion line to the top of the stem. I have it set at the tallest safe point. Currently, I'm at 8cm drop from seat to tops of bars. The bike fitter recommended something closer to 2 cm. I've been having some low back issues lately and I think it might help to be just a little more upright. I'm looking at Nitto 225mm stems, but I'm wondering if I should change the extension concurrently with the change in length.

On my bike fit form he said I was at KOPS-4 prefit and we moved it to KOPS-2. He said that I should probably be even a little further forward. (I'm assuming this is in cm?) He recommended getting a zero setback seatpost. If I get a different seatpost and move the seat forward 2 cm maybe I should go with more extension on the stem to keep my reach similar to what it is now?

I don't know how all these adjustments will interact. Any advice? Thanks!