Here is another picture from today of Earl installing the loader frame while Bob chats on the phone with Jennifer Lopez. Decent view of the tires (better if I could post higher res pictures here).
The front tires are Michelin XM108 radial R1W's, the highest rated agricultural tire in the world. I was the first customer in the U.S. to get them in the size I needed and wanted, which had only been sold in Europe.
The rears are Michelin XM27 radial R1W/R4's (an R1W pattern with R4 reinforced sidewalls and tread).
I will lay out everything in exhaustive detail in my 4 part article. This was a six month research project. I bought a new tractor primarily because I thought I had found the perfect tire set. "Perfect" to me means being able to defeat the Oozama Ver Boten while still being gentle to my lawns.
I'll list all the candidate front and rear tires I researched from Michelin, Firestone, Goodyear and Titan. All the specs. All the necessary computations of 4WD ratios. How to get the right rims. Prices. What considerations I balanced in my final choice (
including garage height; I could have used rear XM27's that were 2" bigger and hence better for 4WD ratio ... aka Mark Chalkley's rear XM27's on his former souped-up
L4310.)
In short, I bought the tractor without tires or rims for a credit of about $1800. Bought the Michelins from two different local tire dealers (one having a complete monopoly on Michelin ag tires in the entire Northeast) ... $239 each for the XM108's (a monopoly price) and $405 each for the XM27's (a discounted price, I think, because they are also marketed as an R4 industrial tire by non-ag Michelin dealers). Then I had to buy a mix and match of different Kubota rims from different Kubota models, all wildly overpriced, to match the Michelin tires. When the price smoke cleared, I spent $168 dollars more for the Michelins and the Kubota rims than the dealer cost (from the Kubota factory) on
L3430 R4 tires and rims. Hence, assuming a dealer markup to the normal customer on tires and rims, I claim my radial tires were "free". (Not counting the 1000 hours of research and travel I engaged in.)
Warranty? Hah! Bring it on, Kubota.
Every Grand L model with R4 tires, except the 3130 and 3430, is out of acceptable 4WD ratio spec according to both the Goodyear and Firestone farm tire handbooks. The bad news for the 3130 and 3430 is that the Firestone rear R4 they all use is on the
wrong (too wide) rim size, according to Firestone. (Purely for marketing reasons, Kubota sticks a smaller R4 tire on the 31/3430 than on the rest of the L Series line, but uses the exact same R4 rims as it uses for the bigger R4 tires on the 3830 and above.)
My tire selections are all on the preferred Michelin rim sizes, and are all within acceptable 4WD spec.
The calclulations don't lie. I shared them all with the dealer before the transaction, and I'll lay out all the calculations to back up my claims in my planned series of posts.