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dannyraddatz 
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Joined: 12 Sep 2009
Location: Plainfield, Ill
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 Topic: 505 Running Gear Tire Size Question
Posted: 02 Oct 2010 at 4:19pm |
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I'm starting to look for replacement tires for our hayrack. When I picked it up last year it had 205 R 70 / 15 or 215 R 75 / 15 tires. What information can you help me with on replacing the tires with the correct one for this rack. Any help would be great on this question.
Thanks,
Danny
Edited by dannyraddatz - 03 Oct 2010 at 5:16am
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Danny Raddatz
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Dave in il
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Joined: 22 Sep 2009
Location: Manville Il
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Posted: 02 Oct 2010 at 9:01pm |
If your talking about multi rib implement tire I would guess a 7.60 X 15 or possibley even 9.5L x 15 depending on your rim size, but hold on to your wallet.
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dannyraddatz
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Posted: 03 Oct 2010 at 5:17am |
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Dave,
My running gear came with car tires on it.
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Danny Raddatz
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Jack(Ky)
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Location: Ky
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Posted: 03 Oct 2010 at 5:20am |
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All the new running gears I have ever seen setting on the lot never had tires on them.JP
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Don(MO)
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Location: Bates City MO.
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Posted: 03 Oct 2010 at 8:03am |
I'm with Jack, If the dealer didn't order the wagon gear with tires mounted on the it then they came without them. Danny, put a tape on the wheels and post the width of them.
Don
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3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep.
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dannyraddatz
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Posted: 03 Oct 2010 at 8:11am |
Looks like 7" x 15" rims, I found a tire like this on the internet, I don't know if I should stay away from radials. How do I know if the rim with a tube is good for 50 psi? http://www.trailerandtruckparts.com/ST20575D15-TOWMASTER-Bias-Trailer-Tire-40F78-1541-LRC_p_898.htmlor this one http://www.trailerandtruckparts.com/ST20575D15-Bias-NANCO-Trailer-Tire-40F78-1541-Load-Range-C_p_180.html
Edited by dannyraddatz - 03 Oct 2010 at 8:33am
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Danny Raddatz
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Don(MO)
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Posted: 03 Oct 2010 at 9:05am |
Here's Miller Tire site go to the FAQ's page the wheel INFO you are looking for is there.
Don
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3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep.
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Gerald J.
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Location: Hamilton Co, IA
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Posted: 03 Oct 2010 at 9:46am |
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First question to answer is how much load do you plan to carry and how fast. How heavy is the empty gear and rack? The sum of the two divided by 4 gets you the minimum tire load rating needed. Tires handle more load at low speeds but also handle more load with greater air pressure up to the limit the tire is good for. Are the rims air tight, so you can use tubeless or are they porous so they must have a tube? Then what are you willing to spend on the tires? New tires might last 5 years, but likely you aren't going to wear them out. Take offs will last until they are 5 years old, then likely will fall apart. Each tire width has a preferred rim width but will work OK on a rim an inch wider or narrower. Radial tires roll easier than bias ply tiers. Radial car and truck tires are reputed to have less lateral stability and so allow a trailer to wander. I have 8 copies of a Titan ST205-75R15 on two trailers and their spares that trail beautifully. ST stands for special trailer and may hint at being a little stiffer to reduce lateral instability.
And the rims need a load rating to exceed the load applied. I was at a custom ag rim shop last week and the boss told me that the varying load rating was from the strength of the wheel center, that the rim part was the same for all load ratings.
So probably pick a tire size and see what you can find take off and second hand in the local tire shops and gather that collection and run.
Gerald J.
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Tracy Martin TN
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Posted: 03 Oct 2010 at 9:44pm |
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My AC running gear brochure states the 505 comes with 14x5,15x5,16x4.50 ....5 bolt hub....tapered roller bearings. HTH Tracy Martin
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Dave in il
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Posted: 03 Oct 2010 at 11:40pm |
This may be similar to what the gear would have had originally
From Blains Farm & Fleet website
Application: tractor front, wagons, balers, spreaders, seeders, irrigations systems and feed yard scrapers
Type: Implement
MTD Diameter: 28.7"
MTD Width: 7.9"
Weight: 22.5 lb
Rim Width: 5.5"
Maximum Load: 2090 lb @ 30 MPH
Maximum Inflation: 52 PSI
Size: 7.60-15SL
I don't know what size your hayrack is but say for example you can get 60 - 70 lb bales on it, thats 4200 lbs, and say the empty rack weighs 1100 lbs, the total would be 5300 lbs, divided by 4 would be 1325 lbs carried by each tire. So the 2090 maximum load capacity of these tires would be more than enough. You'll have to do the math on your actual rack. As others have said you may by able to replace the tires you have with another set of used car tires if their maximum load capacity is high enough.
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