Tires Sub CUT tires...

Henro · Aug 10, 2004

Just a couple random thoughts that I think relate to this thread... /forums/images/graemlins/blush.gif

Foam filling: I bought a set of bar tires for my BX yesterday, and dropped the fronts off today for foam filling. Cost is $38 per tire. I think that is fair...but the rears would have been something like $115 each...so I passed on them and will liquid fill them myself. I just could not bite the bullet and spend as much as the four tires and wheels cost for the foam...

If you do buy something other than factory spec, it would be wise to do a test when they are mounted to ensure that you still have a percentage of overspeed on the front. Either the Goodyear or Firestone sites have a write up on how to do it...you might want to check.

But essentially what they say is to pick a flat spot on dirt, where you can run a while, enough to get at least ten revolutions of the back tire if I remember right.

Before you start, you mark the back and front tire with something. THen you run the tractor in 2wd, for ten turns of the back tire, while a helper is counting the revolutions of the front tire. This gives you a baseline.

Then you do the same thing again, second time in 4wd, and you better have more turns of the front tire, for the same ten turns of the back tire. THis indicates you have a percentage of overspeed on the front, which is what you want.

If you don't have overspeed on the front, you need to get the proper tire size...

This is simplistic but basically what the site I am remembering said. You want overspeed on the front...

megotatractor · Aug 10, 2004

my 2 cents; my 2210 is equiped with HDAP tires. Deep tread knobbies is what they are and they're magnificent in the dirt and on turf. The max front pressure on these is 25 psi which is pretty darn firm unless I get a big'ol bucket of dirt (over 500 lbs) at which point they flex just a little but hold firm over bumps. I run these at 15 psi for mowing then they're "squooshy" but that's nice for mowing. at 25psi the ride is too bumpy.

KiotiJohn · Aug 11, 2004

( So, can I go with the Carlisles that are 1" wider than the OEM Maxxis PowerLugs without doing damage to my MFWD? The new fronts (in the 1" wider size) and the new rears only have a .4" difference in rolling diameter compared to the OEM Maxxis turfs that are now on my tractor, so the numbers are telling me everything will be ok.)
That's nearly 1/2 inch on the rolling diameter, and I'm not sure but that could be too much. Your 4WD has a lead/lag that if not tired properly can cause damage to the drive train. Here's a link to Firestone's site with information on lead/lag. If it works out that you have an acceptable lead/lag difference, those tires should work.
Lead / Lag
As long as the wider tire doesn't interefere with anything, there shouldn't be a problem with that width. John

bandit67 · Aug 11, 2004

Geez, what a pain! /forums/images/graemlins/shocked.gif

It appears that the OEM tires for some of the Sub CUTs (Kubota, NH, Case), are Maxxis Pro Tech turfs or Maxxis Power Lugs. I have the Pro Tech turfs from the factory. The front tires (according to Maxxis website specs) are 17.7" dia, and the rears are 25.5" dia. The Maxxis Power Lug fronts are 18" (+.3") and 26.2" (+.7"), respectively. The Carlisle Super Lug fronts are 18.1" and 26.3", so there really should be no difference between those and the Maxxis as the increase in diameter ratio is nearly the same for both brands bar tires.

Since the Maxxis brand is what appears to be the OEM tire options (and I assume both types of tires are installed on the same exact specification rims), I'm going to assume that I can safely switch to the Power Lugs.

It turns out the tire shop was finally able to track down the Maxxis tires (for $12 more for all 4 than the Carlisles), so I told them to order the Maxxis tires, just for my piece of mind. I think I (we) may be over-analyzing this whole thing, though (I'm giving up an extra 200 lbs per front tire load capacity by not choosing the wider Carlisle's /forums/images/graemlins/frown.gif), but I figure if the Maxxis M7515 Power Lugs are what I would have gotten from Case if they were available at the time I purchased, then those are the ones I'm going with. Plus, the owners manual calls for the same size tire designations whether Bar or Turf, but doen't get specific on the ratios and doing the lead/lag test. My dealer doesn't sell these tires and told me to go to a tire store, with no mention of doing the lead/lag test. So, this may be a matter of me now knowing just enough about tire diameters and MFWD to be dangerous, but not enough to know that I'm getting a little too worked up about it.

So, wish me luck - I'm just going to have the new tires installed when they come in next week, and go blindly into the light. /forums/images/graemlins/grin.gif

Oh, and thanks for that link, John. I'll probably use it to double check the lead/lag anyway (even though I think I'm being a bit too **** about this whole issue).

KiotiJohn · Aug 11, 2004

bandit, I think you're going in the right direction. Sticking pretty much to what the OEM is will probably be a good decision. It's not unusual for turfs and industrials to be the same sizes, with ag tires much narrower. I'm not sure that you wouldn't have had problems with a much wider tire as you may have found that the clearance to the fenders would not be there. There may have been problems with interference at the 3pt hitch as well. Let us know how it turns out. John

MicroPilot · Aug 11, 2004

( ....It's not unusual for turfs and industrials to be the same sizes, with ag tires much narrower.....)

I know this may be simplistic as you can buy tires in nearly any size/tread configuration you want, but aren't there "wide" Ag tires? R2's?

bandit67 · Aug 11, 2004

Well, according to my dealer's parts dept., they don't really see a problem even with going with the Carlisle SuperLug fronts that are 1" wider because the overall diameter is within .1" of the Maxxis PowerLug fronts.

The parts guy did say that as a general rule, as long as I get a bar tire with the same size that's stamped on the sidewall of the turf tire (even though they may be different diameters), that everything will be fine with the MFWD, and I don't need to go through the hassle of finding the diameter differences and checking out the lead/lag ratio. The only real instance that the actual diameters need to be looked into is if I were going to try to add tires of a different size, which is what I was originally looking at when it looked like I couldn't find the Maxxis tires.

FYI, my tire shop isn't having much luck getting through to someone to order my tires, but I was able to contact someone at Maxxis directly via email, and they will ship the tires directly to me for a very good price on the tires, and a better shipping rate than any of the internet tire shops I looked into that sell the Carlisles - still can't find any internet tire shops selling the Maxxis. So for you guys running the Maxxis Power Lugs on your Sub's, you have the option to purchase directly from Maxxis at a very reasonable price. /forums/images/graemlins/cool.gif

KiotiJohn · Aug 12, 2004

Micropilot, ( I know this may be simplistic as you can buy tires in nearly any size/tread configuration you want, but aren't there "wide" Ag tires? R2's? )
If you want to really tear up some grass, use R2's as they are EXTRA deep lugged tires. I don't know that they are extra wide.
Bandit, I only mentioned that wider tires may be a problem because I've read so much about the smaller frames of sub cuts, and was concerned that a wider tire might hit the 3pt hitch or cause other problems. By all means, if your dealer says they are okay to use, the probably are. As for the small difference in diameter, I doubt that would be a problem as long, as you say, the ratios are proper.
What a shame you're having so much trouble getting what you want. John

bandit67 · Aug 12, 2004

Well, I got my order in to Maxxis this morning, so the tires should come in the end of next week.

I know in other parts of the country, the tractor dealers can get their customers tires, and it was even suggested by a rep at Maxxis that I go to a Kubota dealership to get the tires. But it seems that out here, dealers leave the tires to specialty tire shops. My dealer is a Kubota dealer, and another local Kubota dealer both sent me to local tire shops, but none of them deal with Maxxis on a regular basis. Wonder what that means? /forums/images/graemlins/blush.gif

Gee, after all of this, I sure hope I like these bar tires. /forums/images/graemlins/wink.gif

KiotiJohn · Aug 13, 2004

( My dealer is a Kubota dealer, and another local Kubota dealer both sent me to local tire shops, but none of them deal with Maxxis on a regular basis. Wonder what that means? )
I don't know, sure sounds strange to me. Certainly it means the dealer isn't particularly interested in after sale support to me! I hope you'll let us know how they do, and I feel sure you're going to like the tires, A LOT. John