M5-111 @ 0.05mph

[Atypical_decorum]

I gave up with the actual calculation, but it appears that the M5-111 Standard tire is 61.7" diameter, and the M5L-111 tire is 50.6".
Unfortunately, it's also possible that the low profile tractor has different gear ratios.

That's true. I've seen several versions now. The three most common I've seen are 1mph, 1.7mph, and just over 2mph at 2krpm.

I suppose it could actually be 0.05mph. That M9960 I had did have a creeper gear and did about 0.13ish mph at 2krpm. On smaller tires, that could be less for sure.

The M105s I had did 1.7mph in low 1st, but those were tires that were as tall as me.

 

[ras5309]

I don't know if such a thing exists, but search for a speedometer app for your phone that reads out in hundredths of a mph, then go "road" test it.
Ask the guy how he got his figure and make him prove it to you.
Or, road test it and see if it "feels" right.
If it's a dealer, make him bring it to your property to try it out there.
I've always found the "pucker factor" to be extremely accurate for me.

 

[Atypical_decorum]

I don't know if such a thing exists, but search for a speedometer app for your phone that reads out in hundredths of a mph, then go "road" test it.
Ask the guy how he got his figure and make him prove it to you.
Or, road test it and see if it "feels" right.
If it's a dealer, make him bring it to your property to try it out there.
I've always found the "pucker factor" to be extremely accurate for me.

That kind of speed is hard to get via GPS without some seriously expensive equiptment. Something touching the ground is the best way or maybe... Laser beams!

When you see the tire of a tractor at 0.1mph moving, it's painfully slow. The front tire is at probably about 0.04rpm if it's a 46" tire.

 

[newbury]

That kind of speed is hard to get via GPS without some seriously expensive equiptment. Something touching the ground is the best way or maybe... Laser beams!
<snip>

Or
measure a known distance and time it.
count tire revolutions and calculate, assuming no slippage.

 

[Tinhack]

They have hills like that in NYC?

 

[Atypical_decorum]

Or
measure a known distance and time it.
count tire revolutions and calculate, assuming no slippage.

But there's a possibility to use laser beams!!

 

[Atypical_decorum]

They have hills like that in NYC?

Ha, it's for when Im using the moonraker.

 

[Tornado220]

That kind of speed is hard to get via GPS without some seriously expensive equiptment. Something touching the ground is the best way or maybe... Laser beams!

When you see the tire of a tractor at 0.1mph moving, it's painfully slow. The front tire is at probably about 0.04rpm if it's a 46" tire.

place a mark at the start and run it for 60 seconds then measure from start to finish... you may have to measure it over less time (shorter distance)

The Math is simple enough

60 seconds is 1/60th of an hour so times the distance run by 60 to get distance / hour and then

some samples:-

60 mph is 1 mile per minute

6 mph is 0.1 mile per minute = 176 yards/min

0.6 mph is 0.01 mile per minute = 17.6 yds/min

0.1 mph is 0.001667 miles per minute = 2.933 yds/min

and so on