RPM of a wheel going at 40 kph?

[Wobblebox]

Just wondering what the rpm of a 10.0/75 -15.3 wheel going at 40 kph would be?

 

[farmerm]

Will depend if it is rotating on a axle or traveling in the boot

 

[chickens and wheat]

260 rpm

 

[Drillman]

Well diameter is 780mm times that by 3.142

So 2450mm rolling radius. Or 2.45m per revolution.

40km/hr is 1000m x40 =40,000 meter.

Divide 40,000 by 2.45

Equals. 16236.5 revs a hr

Divide that by 60 to gets revs a minute

Equals 272RPM.

But don’t take that as gospel cos I’m no maths expert.

 

[farmerm]

Well diameter is 780mm times that by 3.142

So 2450mm rolling radius. Or 2.45m per revolution.

40km/hr is 1000m x40 =40,000 meter.

Divide 40,000 by 2.45

Equals. 16236.5 revs a hr

Divide that by 60 to gets revs a minute

Equals 272RPM.

But don’t take that as gospel cos I’m no maths expert.

Same maths I was working on but I found a diameter value of "29.9".... wish I guess must be inches which makes diamter = 760mm

Equals 280 RPM

Same ball park...

 

[Drillman]

Same maths I was working on but I found a diameter value of "29.9".... wish I guess must be inches which makes diamter = 760mm

Equals 280 RPM

Same ball park...

Yeah tyre diameter appears to vary a bit according to what figure the google search brings up but think the ball park figures been similar means were all on the money?

 

[Pennine Ploughing]

Will it spin faster when it's flat ?


Asking for a friend

 

[Kidds]

It will spin faster when the tread is worn

 

[JCB_JCR]

I got a similar rpm using 2x10x0.75 and adding that to the rim diameter. Guess a flat would spin faster because the rolling radius would be less

 

[chickens and wheat]

African or European wheel?

Ref. Monty python