Main landing gear

[FMild]

Interesting discussion. I've flown two larger aircraft with gear limiting speeds; one does not differentiate (165 KIAS period), the other which specifies retraction, extension, and extended speeds, all different. Not knowing which is why I posted that.
The rear doors certainly must be a reason for the speed, but I'm curious if the small panel that stays extended from the nose gear could be a culprit as well.

[FMild]

Oh, and I just looked it up in my (1969) owner's manual, and on page 4-2 the table states "Maximum speed...Gear Extended - 140mph" Wonder why the difference between models?