Tires tire question

[Nmw1]

my nx4510 comes with 14.9x24 tires on the rear, was thinking of putting the 17.5x24's on like nx5510 and nx6010 has for added weight and stability, my kioti dealer didn't think that was a good idea saying it might affect gearing and could void warranty. i mentioned about the 5510 and 6010 having them and said they may be geared different and advised me to just not do it. Anyway to verify this? i would think the 17.5's are just wider not taller so the gear ratio shouldnt be a problem

 

[KYErik]

Are you also planning to switch to wider rims? Putting the wider tires on the same rims may also make the tread a more rounded where it contacts the ground. As a result, it may not wear evenly. Hopefully some one else on this site has done it and can tell you exactly how it worked for them.

 

[coralhead]

Should work just fine as long as you don't use with the 4wd engaged. The different size tires will always put the drivetrain in a bind when the fronts and rears are tied together.

 

[Nmw1]

the nx5510 and nx6010 are almost the exact same tractor same frame, motor, just more horsepower and bigger back tires, was curious to see if there are any other changes kioti made to them in the gearing to accomodate the bigger back tire size

 

[jabelding]

Its only a difference in width so it shouldn't effect the drive ratio if you get the correct width rims.

 

[Sawyer Rob]

I'd be surprised if they aren't taller too, and it doesn't take too much to mess up the gearing.

SR

 

[SPYDERLK]

the nx5510 and nx6010 are almost the exact same tractor same frame, motor, just more horsepower and bigger back tires, was curious to see if there are any other changes kioti made to them in the gearing to accomodate the bigger back tire size

... like a bigger front tire size.

 

[Kioti Paul]

My Dk45 has 17.5 x 24's and they are 47 1/8" tall. I made that measurement with the tractor parked on concrete, with pressure in the tires great enough that there is no visible "sag". I made sure there was a lug at the very top of the tire,(industrial lugged tires) and ran a level from the top of the tire, out to the side far enough that I could get an accurate measurement. Of course, I have no way of measuring the wear on my tires, but I don't think there is any measurable amount - I have 600 hrs, & my tractor is a "hay" tractor (I never pull heavy loads)

I agree with the fellas who say the rims are (probably) different; 2 1/2" wider tires are nothing to "sneeze at"! I measured my rims, but there is a certain amount of "eye balling" involved, so I would not 'guarantee' the measurement any closer than +/- 1/2". I measured from (basically) bead to bead, and came up with 15 1/2". That was NOT measured from the "flare" that 'bevels' out from the bead (that would probably add another 1" + to the overall width.

I think you are wise to get as much info as possible; but in the end, the decision is yours. If I can help with any other measurements, let me know.

Good Luck

 

[Nmw1]

thanks kioti paul, i'm gonna check with the dealer and see if the rims are different i do know they all have the same front tire size. i just dont see the gearing being different in the 5510 and 6010 than my 4510, i think the rolling circumference of the two sizes are close enough that it should be ok, gonna see if i can get that info. i would assume kioti just put wider tires on them because if the extra horsepower

 

[DieselBound]

Any chance that this could throw off/confuse the computer?

 

[Kioti Paul]

Nmw1,

I think I may have misunderstood your 1st posting.... I thought you were looking for new tires for a tractor that you owned. Now I think maybe you are looking to purchase a NX4510, and want the dealer to install 17.5 x 24 tires??

If you actually have the tractor now (sitting in your barn), I think I gave you the info you would need to compare the OD of the 2 tires (you would have to measure your own)... if you want the circumference, multiply times 3.1416 (148")

If you are looking to purchase a NX4510, I am sure there must be sales brochures which list the tire options. When I purchased my DK45 (6 yrs ago), I saw all the options available for my model tractor - including (I think) 3 different tire options.

If the 17.5 x 24 is not an option, it doesn't seem reasonable (to me) to expect the dealer to install (& apparently eat the cost of) tires not approved of by the factory. If 17.5 x 24 tires are an option, & the dealer is balking at going to the trouble of ordering what you want, it may be time (in my opinion) to find another dealer.

Again, if there is any measurement you would like about 17.5 x 24 tires, just let me know, & I will do my best to measure my tires & let you know.

 

[Nmw1]

yes sorry i've had it for about a year now gonna measure mine as soon as i get a chance, its not something i must have just was curious if it would work with no problems, i could always go up a size in the rear and front to equal it out like 12x16.5 in front and 16.9x24 in the rear but thats some money right there and not really necessary, i may swing by the kioti dealer in the next few days and see if they have a nx4510 and nx6010 that i can compare side by side

 

[Nmw1]

ok did the same kind of measurement using a level. i have 120 hrs on the tractor so almost new and they measure the same after several checks 47 1/8 slightly give or take a fraction due to not having a real clean level surface, so i don't see why they would cause any trouble since the height is the same or really close as you can see one side is a little taller could be air pressure or un level ground

 

[coralhead]

How much warranty is left on the tractor? Are your rears worn out after only 120 hrs? What is the main purpose of needing different rears? If it is a weight issue, are your current tires filled? Adding fluid can give you a lot of extra weight. (Loaded rears on my Branson gave me close to an additional #1000 lbs total) Is it mainly because it looks better or tougher? These are just questions that I am asking because if you intentionally go ahead with the change and have drivetrain related issues while still under warranty, Kioti will most likely say that the original design of the tractor and tire combination was willfully altered and thus any damage from this is on you. If I was the dealer I would make that clear that I highly recommend not to alter the tire setup and would cause warranty to be voided. Even if the drivetrain stays intact the front tires will be subject to accelerated wear due to circumference ratios other than designed. Do the larger tractors have higher HP? If so they have more torque to turn taller rears.

 

[LD1]

The 14.9-24 and 17.5L-24 are the same diameter for all intents and purposes.

there are always slight variations in the measurements among different MFG's. There is less than 1" difference in those two tires. IT aint gonna effect the gearing at all IMO. You can make a bigger difference just in playing with air pressures. And I believe you are probably right about the NX55-NX60 being the same gearing internally, and they all have the same front tires.

SO I say if you want to, go for it and the tractor is not gonna care one way or the other. But I question the need. You arent gonna notice much real world difference in changing to a wider tire. So what has you wanting to switch?


Wider is good for more flotation, and less compaction.....meaning it wont rut up as bad. But that usually isnt a concern on the rears. IF your rears are rutting things up.....the fronts are probably really doing alot more damage.

For firm/dry soil.....there isnt gonna be a measurable difference. Added ground contact area but proportionally less ground pressure. Traction is a function of the weight, not the tire size when you are on firm footing.

 

[SPYDERLK]

The 14.9-24 and 17.5L-24 are the same diameter for all intents and purposes.

Thanks for introducing the L.​

Without it this thread makes no sense.

 

[Nmw1]

my rears still look new and are loaded, i would want the wider for added weight and stability on hills, even with my boxblade on and loaded tire i have had the rear lift a little. its not that big of a deal or something i just gotta do i was curious to others thoughts on it. i agree LD1 i don't think it would affect tractor at all and I'm sure if i talked to the dealer in depth about it it wouldn't affect warranty they probably wouldn't even notice the change since all the nx's look just alike

 

[LD1]

Only looking at another ~50# per tire. Probably not enough to make a difference.

You have a big tractor, you need bigger/heavier implements. A standard boxblade, in the 6-7' range is only gonna weigh 500-800 pounds. And box blades or short, so the weight isnt very far back.

800# is barley enough rear weight for a 30HP 3000# machine. You need to find a heavier implement to hang back there, or make a ballast box. Adding 50# to each tire (at the upcharge cost of ~$400 per tire) is not gonna gain you a thing.

 

[Nmw1]

wonder how much more fluid they would hold adding more weight there also but yeah not enough probably to justify cost, my boxblade is a rhino 72" its gots weight and does just fine but could have used a little more a few times

 

[coralhead]

are your rear wheels spread out to increase the width? You can gain an additional 4" if the wheels are moved to the outside of the hub mounts.