Road Speed Of Combines ??

Maybe 35 Kilometers per hour, which does calculate to 21.75 miles per hour  which is more like it??  on a dual read speedometer maybe the driver was cornfused ??

Yes. Probably best to road drive any newer rotor combine with your hand/fingers on their throttle/engine rpm speed buttons(1,2,3 rpm settings)to quickly reduce their top-end speeds, if situations demand it. IMO-Engine speed reductions usually make for safer/gentler drivetrain maneuvering than pulling back on transmission hydro lever at high idle.
The newer Gleaner rotor combines(maybe other brands too?) have more rear steer axle weight than the older conventional combines. So rotor’s additional weight distribution probably allows them better steer control for higher road speeds? Try roading an older conventional gleaner with an attached cornhead, in high gear. Fifteen mph & things could get interesting because it may not have had enough rear axle steer tire weight. On the other hand, the older 2wd conventionals transverse soft soils if equipped with wider float tires because more of their weight is concentrated on their drive axle. The larger rotor gleaner’s rear wheel assist is much needed in soft soils because of their increased base machine weights too.
The L2 weighs 14,700lbs.
An N6 weighs 18,820lbs.
An R52 weighs 20,840lbs
An R75 weighs 28,500lbs.
An A85 weighs 37,700lbs.
An S77 weighs 29,740lbs.
An S98 weighs 33,920lbs.
Think these weights are high? Some competitor brand combines can easily add upward of 10,000+ lbs to the Gleaner weights!

Edited by AC7060IL - 17 Sep 2021 at 6:25am

Our S78 and S97 do 23 mph plus. Hammer down to the next field!

It’s a good thing I don’t have to road my E anywhere because it’s snail slow on the road. It might be 10 mph...

drove an N5 about 18 miles one day, it went about 35 MPH. was clocked by the vehicle following me. didn't bounce all over like some do at 15-18 MPH. one of my "G" combines would do about 20, and the other did about 15, same tranny in both. the one that was the slowest was squirely on the road. 

I think my 'new" R62 goes over 20....that was January when I drove it home so memory ain't there.

bet you could google it.