Wheel size

[chrisdm8 0]

Hello, I would like to know the original wheel and tire size for my HB-112. By measuring... the rim that's on it looks like it's a 12x8.5 with a 5x4.5 bolt pattern. This was just by quick measurements with a tape measure so I hope someone can confirm my measurements before I buy anything. Unfortunarly, I don't know of a good way to measure the wheel that's on it right now. I realise it's not nessesary to get original size tires but want to try to keep it as close as I can if possible. The goal is to get a second set of rims with ag tires on them so I can switch between turf tires and ag tires. Thanks in advance for the help!:D

[PatRarick 1]

Can't say for sure without going out to measure, but there's a set on e-bay right now. They're a little wider rim. 23 X 10.50 X 12 ag tires work great on these rims. http://cgi.ebay.com/Simplicity-Sovereign-3112H-GT-Parts-Wide-Rear-Wheels_W0QQitemZ120099962853QQcategoryZ82242QQrdZ1QQcmdZViewItem

[UCD 14]

Pat Don't you mean 23 X 10.50 X 12

[Tom_Byrne 0]

MY TWO CENTS: Not positive, but I think thru the factory they had 23x 8.50x 12's on the rears.

[PatRarick 1]

Yes I do Maynard. Thanks. Edited my reply to correct.

[chrisdm8 0]

Thanks! So in wheel sizes 23 x 8.5 x 12 would be for a 12" dia rim that's 8.5" wide, right? What's the 23 dimension? My simple understanding of auto tires leads me to think that would be final O.D. of the tire but 23" seems big for the diameter.

[UCD 14]

Standard tire size on B-112 - HB-112 is 23" X 8.5" x 12" ( 23" tire diameter X 8.5" tire width X 12" wheel diameter ) The standard wheel size is 7½" x 12" 5 on 4½" ( 7½" width between beads 12" diameter 5 bolt pattern on a 4½" bolt circle ) http://www.simpletractors.com/models/b_series/1968_cat/more_features.htm Model B-110 - 4.80 x 8 two ply front tires, 23-8.50 x 12 rear terra tires, 16-6.50 x 8 front terra tires are optional. Model B-112 - 16-6.50 x 8 front terra tires and 23-8.50 x 12 rear terra tires as standard equipment. The 8½" wide between beads, solid center wheel was a later option

[HubbardRA 19]

When buying another set of wheels, the most critical items are the width of the wheel, which governs tire size that can be used, and the Back spacing of the wheel, which controls clearance of the tire with other parts of the tractor. To determine the back spacing, lay a straight edge across the rim and measure to the face of the wheel where it seats on the hub when mounted. Rims with smaller measurements than stock are usable because the rim will be farther away from the tractor. If the backspacing measurement is larger that stock, there is the possible problem with the tire interfering with tractor operation, especially if you are running a tiller, or vacuum where clearance for a belt is required between the tire and the transmission.

[PatRarick 1]

These rims on e-bay are the correct dimension, just wider towards the outside. Can't recall for sure, but I believe they are 9" wide. Turf tires aren't too fussy, but ag tires need the proper size rims for maximum performance. The 7.5" wide rims will accomodate both 8.5" and 10.5" turf tires with little noticeable difference. When using ag tires, 8.5" tires are correct for 7.5" rims, and 10.5" tires need 9" rims. You can use the wider tire on the narrow rims, but the tread surface is more rounded. You have less ground contact, with only the center 1/2 to 3/4 of the lugs on the ground. With the correct tire on the correct rim, you have a flatter tread surface. Nearly 100% of the lugs are on the ground.

[ZippoVarga 75]

Taking Rod's information into account you can be safe getting an old used set of wheel horse wheels. They are of set 1 1/2 inches more towards the out side of the wheel, making them ideal for a wider stance. This is what I did with a set because of a couple of inclines I have on my property. I felt unstable mowing along the incline with the stock off set wheels, but with only the three inches of combined gain in rear width the stability of the Landlord was greatly improved. You mentioned that you wanted to go to an ag tire for those times when you may need more traction. This was my thought when I purchased my ags. Turns out they are on my tractor full time even through the mowing season. They don't tear up your lawn and they provide greater traction than the stock turf tires. I noticed when I was going around trees and on slight inclines that one tire would spin untill the limited slip kicked in resulting in bare spots where the tires would spin.. With the Ag tires, this is almost eliminated in my case. I also added a set of tri bar tires to the front which also have proven to be "kinder" on the lawn than the stock turf tires. The turf tires would sometimes slip and not track properly causing skid marks on the lawn. The tribar tires seem to grip better in most cases. But beware if you go this rout, turning sharp will cut into the earth if it's soft ground. I also have a set of ag front tires. These are soley dedicated to dirt or snow or stone work. They are very aggressive and DO dig into the earth when turning regardless of the earths condition. If your yard is mostly flat and you dont have many tree's to traverse around then the turf tires would be fine in my opinion. Welcome to the club, you will find any and all information you could ever dream of here. Combined I'd venture a guess of over 500 years of experience between the walls of simple tractors. Well worth the 10 dollar investment.

[chrisdm8 0]

Thanks you all for the help. I think my plan is to get a spare set of old rims off ebay or something. 12" x 7.5" and get 23 x 8.5 x 12 ag tires. I'm concerned that on the soft ground if I use ag tires all the time it will leave tread marks and turn the ground bumpy. The turf tires wouldn't leave as big or as deep of tread marks in the soft ground. That's my only concern with ag all the time. I certianly will give it a try though... worst case I'd be forced to get a lawn roller and smooth it back out again *oh darn* :D