• A slacker seat tube angle will increase the distance from the bars to the saddle, so effectively making it longer. This is one of the problems with the reach measurement, that and it doesn't take stem length into consideration. If you're going to be riding fairly flat ground go medium, if you're going up and down go large and slam the saddle forward.

    29 will allow you to plough over the ground more comfortably than 27.5, and is less agile.

  • Thanks for explaining that - super helpful. For my needs a large frame with 27.5 wheels sounds the ticket but will keep researching and double guessing myself obviously.

  • I’m your size, have ridden a large Cotic (from 2011!) forever.
    If it’s your first mtb don’t worry about wheel size. It honestly doesn’t make that much difference.
    As I posted somewhere before- buy 2nd hand frame, wheels, finishing kit. And New/new in box fork, brakes, transmission.

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