Not in the taildraggers I fly, it isn't.
A locked wheel, fully-castoring tailwheel turn in a 'dragger would have me watching my tailwheel, not my other main; so my limiting factor would be wheelbase, not track.
OK. Then define the turn radius you want: main gear, all gear (ground radius), fuselage, entire airplane (gross radius)...
Assuming no skidding, the gross turn radius for the entire airplane will be approximately the distance from the innermost main wheel to the furthest outside point on the airplane (could be wingtip, tail, horiz stab...) PLUS the min turn radius of that wheel from the center of the turn. The turn radius of that inner wheel will depend on the nosewheel caster limit and drag of other gear, and could be near zero (maybe the width of the tread) for a fully castering nose/tail wheel and a simple tricycle gear arrangement. OTOH, the center of turn for a 744 is approximately at the leading edge of the wing, just outboard of the inboard engine nacelle.