• Is there a simple rule of thumb when swapping to narrower bars (with the same reach) to figure if and by how much stem length should increase? I've seen MTB guys discussing 2 to 1 when going wider (20mm wider bars, 10mm shorter stem) but I'm not sure how well that translates to road setups.

  • There's not as much variation in width between road bars, compared to MTB bars. I'd just stick with the rough rule that bars should be about 2cm wider than shoulder width

  • 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.

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