I very much love my Fortitude.
The rear tyre clearance, allowing for mud, is fairly tight.
Since I built the bike up years ago I've been running a 2.1'' WTB Prowler SL tyre thats sadly starting to wear out 🙁
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I've got a DS 25 rim that seems to make the most of, what is these days, a narrow tyre.
A 2.25'' Ardent is a touch big - which is a shame.
I like the side knob (s****) pattern of the Prowler and the minimalish centre line tread which helps when its muddy around here (its claggy soil/clay) and rolls well when its dry.
So suggestions.
Ground Control 2.1 with a control casing or grid if you need extra grrr in the sidewall.
Spesh Ground Control, saying that I ran a mud X in mine all year round.
That was the one thing that let the fortitude down; the silly tight rear end. Fabulous bike other than that
Thanks guys.
Small bump for the evening.