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Tire Machine Assist Arm

jk86racing

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Jul 5, 2025
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Hello, I'm currently looking for a tire machine with an assist arm and I was wondering between the two pictured, which would be best. The machine would be used for lower profile car tires, small trailer tires, and light truck tires. Thank you!
 

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Torque&Recoil

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Sorry, your pics come across (to me) kinda small, so not so easy for me to see what's going on. Regardless, on the topic of assist arms - I have a reman Coates machine with assist arm. Can you live without the assist arm? I have a friend who says yes, but personally, I call
BS. The Coates assist arm has saved my a** several times. I often mount 45 series tires. My opinion - I use the arm mostly for pushing DOWN, and only occasionally for pulling up. I do not have a "disk" assist thing - not sure if that would be a bonus or not. But I do use the assist arm for pushing down, every single time that I mount a tire. For small trailer tires, or "grandma" 80 series tires, you can probably get away without any assist arm.

If you want to chat further, shoot me a PM. I'm a racer also...
 
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jk86racing

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Jul 5, 2025
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Sorry, your pics come across (to me) kinda small, so not so easy for me to see what's going on. Regardless, on the topic of assist arms - I have a reman Coates machine with assist arm. Can you live without the assist arm? I have a friend who says yes, but personally, I call
BS. The Coates assist arm has saved my a** several times. I often mount 45 series tires. My opinion - I use the arm mostly for pushing DOWN, and only occasionally for pulling up. I do not have a "disk" assist thing - not sure if that would be a bonus or not. But I do use the assist arm for pushing down, every single time that I mount a tire. For small trailer tires, or "grandma" 80 series tires, you can probably get away without any assist arm.

If you want to chat further, shoot me a PM. I'm a racer also...
Thank you and sorry for the small pictures. I've decided on a machine with an assist type arm and I'm just looking for the difference between the dual assist arms and the single arm with the bead roller. It seems Coats have the double assist arm so I'm leaning towards something that style.
 

mikedodge

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Jun 27, 2017
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I've never used one with the arms. Some tires can be a pain but I can't justify they cost of a different machine.
 

jdjm

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I have a snap on with a helper arm and it's the one with a disc on it. It works well because I have some 20'' in my family. I wouldn't have anything else it works so well for big and little tires
 
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jk86racing

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Post some links to where these machines are for sale.
Here are the two I am currently looking at:
https://autool.us/products/tire-changer-kt-t830
https://autool.us/products/tire-changer-kt-t835

I've never used one with the arms. Some tires can be a pain but I can't justify they cost of a different machine.
I don't currently own anything so I figure buy once, cry once and get the assist arm to make things easier.

I have a snap on with a helper arm and it's the one with a disc on it. It works well because I have some 20'' in my family. I wouldn't have anything else it works so well for big and little tires
Thank you, this is exactly the advice I was looking for. I'm going to have anything from low profile, to trailer, to light truck tires to deal with so it sounds like the disk is the way to go.
 
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5ubtle

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My machine doesn't have any assist arms, and I can do most tires. Don't think that you *need* the assist arm. Tire changing is 80% technique. Low profile doesn't *require* a assist arm, nor does large diameter. What really requires an assist arm are run-flats and other stiff sidewall tires (i.e. summer performance tires). If you can spend the extra money, the assist arm will make life easier.
 
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jk86racing

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My machine doesn't have any assist arms, and I can do most tires. Don't think that you *need* the assist arm. Tire changing is 80% technique. Low profile doesn't *require* a assist arm, nor does large diameter. What really requires an assist arm are run-flats and other stiff sidewall tires (i.e. summer performance tires). If you can spend the extra money, the assist arm will make life easier.
I'm good for spending extra, but I'm just curious as to what style as listed above would work better from peoples experience.
 
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Renegade1LI

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Mar 11, 2018
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long island ny
I just bought the one with two arms, then I have it if needed. I have used it a couple times and it's nice to have, especially if you don't use it allot.
 

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Torque&Recoil

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Hope I'm not steering you wrong, but I'd go for the 830. HOWEVER, I'm not 100% certain about the bead blast function. Sometimes, you REALLY need bead blast to seat the beads. The idea is for air to shoot out near the four gripping heads. I'm not totally certain how that works on the 830 - suggest you ask that question.
 

djbmw

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Jun 20, 2013
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Both of the machines that you posted have the same function since both assist arms are powered.

The bead depress arm that has a large degree of swing serves the same funtion on both machines.
The secondary assist arm is used for holding the bead on the duckhead while mounting low profiles, and depressing the bead area to apply lube prior to de-mounting (or re-lubing for a stubborn mount).

The question you're asking is... how much is the extra "disc" worth, vs just a roller. Not much. Not much at all. Its certainly not necessary. Its like having 5 cupholders in the front of a car. Necessary? No. Would you ever use them?... mayybbbeee.... but i wouldnt spend extra on it if you dont need to.

Edit: i just noticed the comment abive RE bead blaster. Chinese bead blasters can be bought for $100 and work much better than an integrated blaster as they are portable. Whats the price difference between the two units?
 
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jk86racing

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Both of the machines that you posted have the same function since both assist arms are powered.

The bead depress arm that has a large degree of swing serves the same funtion on both machines.
The secondary assist arm is used for holding the bead on the duckhead while mounting low profiles, and depressing the bead area to apply lube prior to de-mounting (or re-lubing for a stubborn mount).

The question you're asking is... how much is the extra "disc" worth, vs just a roller. Not much. Not much at all. Its certainly not necessary. Its like having 5 cupholders in the front of a car. Necessary? No. Would you ever use them?... mayybbbeee.... but i wouldnt spend extra on it if you dont need to.

Edit: i just noticed the comment abive RE bead blaster. Chinese bead blasters can be bought for $100 and work much better than an integrated blaster as they are portable. Whats the price difference between the two units?
Since both machines are priced within $100 of each other, cost isn’t a deciding factor. I’m more interested in which design offers greater utility based on practical experience. While both machines serve the same function, they operate differently.

One features two separate cylinders with a wedge and a roller, giving it independently controlled assist arms. The other uses a single cylinder to manage everything. My gut tells me the dual-arm setup offers more flexibility and control, but the manufacturer claims the single-cylinder design is superior due to its greater strength.

However, when I look at Coats machines—widely regarded as some of the best in the industry—they consistently use the dual assist arm configuration. That makes me question whether the added strength of the single-cylinder design truly outweighs the versatility of independent control.
 

djbmw

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Two independant arms means more flexibility on positioning. With the single cylinder there's a lot of steel on the right side of the machine that will get in your way.
You're not changing a dozen set of tires a dsy though so it wont matter THAT much.

Having said that, i own a Coats 7060 with a single robo arm and a manual bead roller.
 
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