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  • What @jono84 is asking is if you go from say, 40 to 38 bars should you add 1cm in stem length.

    It's not very scientific but I guess it's not a bad rule of thumb to start with. Welcome to narrow bars.

  • Yep this. I went from 42 to 38 as I didn't have a 40 to hand. Generally liked the narrower position but started to get some lower back pain which I believe was due to the reduced reach compression.

    Are you a fan of narrower bars then?

  • I am. I have narrow shoulders and the bars that would come stock were always too wide for me (I'm 5'11" and ride a 55/56). It feels much more natural now on 38cm hood to hood, and I don't think I'll ever go wider than 40. You do end up with long stems though, I have a 140mm on my TCR and the position is not ridiculously aggressive.

  • Surely narrowed bars will increase reach?
    Wide bars will will make the angle of your arms more obtuse and move your centre towards the stem.

    Maybe the narrow bars are rolling your shoulders in and causing you to hunch over a little?

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