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Ok Spicergear, yeah, I'm only interested in "siping". What you'll find on Sperry deck shoes. Seems that they are using grooving and siping to mean the same thing. I get a lot more hits on Google with grooving , but I see what you mean. I plan to sipe the front tires, which are almost new (7,000...

Spicergear, looking back at your pictures, those grooves seem very wide. I expected the siping to leave tight slits that are not even open until they hit the pavement. Did you use a regular siping tool? I'll get mine, possibly, later today and will show the result from it as soon as possible...

Thanks for the pointers! I'm only concerned about wet pavement traction.

Spicergear, do you have any hints on grooving the tires, depth distance apart etc. Images? I'm waiting for a grooving tool, should arrive at any time.

I agree that the NDCC's are no good on wet pavement.

The image of my front tire shown a few posts above has over 5,000 miles on it at the time of that photo. It wears about 1/32/1,000 miles, I figure it's good for at least 15,000 miles. You have to adjust the pressure for max tire to ground contact. For 900-20 tires use 60 psi in the front and 40...

Age of a design has nothing to do with its utility. I believe a lot of thinking went into the NDCC tires. And they are still made today. An offroad tire should be self cleaning, just look at tractor tires, that design hasn't changed in 75 or more years. The Michelin XL tread pattern has "traps"...

I was thinking about the slicks used by drag racers. A tire with many "moving parts" will also get hotter on dry pavement, limiting its top speed. Below is an image of my left front after about two hours at 50+ mph on dry pavement. It's an 11.00-20 with a TP of 72 psi.

I grant you that. What about DRY pavement traction? I started a thread in the "Deuce" section, but didn't get any response.

Googleing the Michelin 11.00Rxl tire came up with at least one comment that they have "virtually no traction on wet pavement". Great off-road, but no better than the 1100-20 NDCC's for the highway.

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Thanks, the spacing with my 11.00-20 tires is almost exactly 5 inches, so you should be good for chains too, if you needed them.

Looks like a working deuce to me! How close are the rear tires? Doesn't appear to be enough space for chains. Like those tires, but need my chains a lot... snow mud, you name it. Never leave home without them.