Kubota M7040 with grooved R4's

[Rob41]

Good to hear of your experience with them. It sounds like most people have had similar experiences.

 

[sixdogs]

Does anyone have any up-close pics of grooved tires?

 

[ovrszd]

Best pic I have is the one I posted at the beginning of this thread.

Here are a couple pics of the results on dirt.

 

[Rob41]

Cool! Been noticing the tracks I've been making in the snow too.

 

[sixdogs]

The results look very professional.

 

[ovrszd]

Cool! Been noticing the tracks I've been making in the snow too.

Kind of a sidetrack, but I read a paper concerning tire traction in snow several years ago.

Tire traction in snow is created by trapping snow in the tire treads, then scuffing that trapped snow against snow on the ground. The friction between the two creates traction. Thus, a tire with multiple sipes and tread angles will fill with snow quicker, and create more traction. When the tire rotates and the portion of tread filled with snow elevates off the ground surface it will flex and throw out the trapped snow. As that portion of the tires again makes contact with the ground it will trap snow, scuff it against the snow still contacting the ground and create traction. This principle is also why Radial tires will always provide more traction than bias tires with the same tread pattern. Radials control the tread face of the tire better than bias tires. The tread of the radial flattens itself on the ground, which closes the gap in the tread, which fills and grips the snow. That is evident when you watch a vehicle drive off with Radial AT tires. They are full of snow and toss it off as they rotate.

Sorry for the lengthy description. It's rather complicated....

 

[TractorTYMe]

Here is an older thread on the subject. I'm a Believer... No Not the Song... R4 Tire Grooving

 

[Rob41]

The results look very professional.

Honestly, unless you fall asleep in mid-cut, it's pretty easy to have good results. It's not perfect but somehow still looks pretty consistent.

 

[Rob41]

Here is an older thread on the subject. I'm a Believer... No Not the Song... R4 Tire Grooving

Thanks for that link!

 

[Rob41]

Kind of a sidetrack, but I read a paper concerning tire traction in snow several years ago.

Tire traction in snow is created by trapping snow in the tire treads, then scuffing that trapped snow against snow on the ground. The friction between the two creates traction. Thus, a tire with multiple sipes and tread angles will fill with snow quicker, and create more traction. When the tire rotates and the portion of tread filled with snow elevates off the ground surface it will flex and throw out the trapped snow. As that portion of the tires again makes contact with the ground it will trap snow, scuff it against the snow still contacting the ground and create traction. This principle is also why Radial tires will always provide more traction than bias tires with the same tread pattern. Radials control the tread face of the tire better than bias tires. The tread of the radial flattens itself on the ground, which closes the gap in the tread, which fills and grips the snow. That is evident when you watch a vehicle drive off with Radial AT tires. They are full of snow and toss it off as they rotate.

Sorry for the lengthy description. It's rather complicated....

Not lengthy at all. It's a great explanation of how it actually works.