• all the time, in my experience.

    I really don't understand Bombtrack bringing out this frame with post mount. GRX won't even fit.

  • Post mount rocks, fuck flat mount.

  • All cheaper steel frames come with flat mounts. Genesis, brother, surly, etc. I guess it's cheaper to weld an IS mount to two tubes than to manufacture one with flat mounts.

  • I really don't understand Bombtrack bringing out this frame with post mount. GRX won't even fit.

    Get you, the Arise were made both flat bar and drop bar as well, so kinda make sense why it's like that.
    However at the same time no reason why you can't have flat mount with post mount adaptor for flat bar.

  • I think it is an oversight from Shimano only speccing flat mount calipers when so many frames aren't flat mount compatible.

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