UDR Problem No-One Talks About (GPM) 4k

[@TheAmericanUhate]

It's not designed to drive & wear like a prius. It's designed to be like a trophy truck, the tires will wear as such.

[@milspecmike8440]

Angle wise, tire wear on the shoulder of the tire is a camber wear pattern, toe wear would be wear across the face of the tire. I think your problem is lateral force causing both positive camber and tire roll, both of which cause outer shoulder wear. I doubt the angle is causing it, more likely the very soft compound tires that hold no air are rolling over and wearing on hard turns.

[@rt66rc86]

Hi Andrew! I don't have a UDR yet, but I do run a Slash Ultimate. The front end suspension issue and tire wear that you describe are related entirely to "camber". I had to adjust the front end of my Ultimate so that when you rolled the vehicle over to the extreme it would reach when cornering, the outside tire tread surface would be entirely "flat" against the road surface, so that the outside tire edge would not tend to dig in and cause the truck to roll over. With a 4x4, you will get un-even tire wear doing this due to "tilt" of the front tires and the fact that they are drive tires. But it's a good trade off if hard cornering performance is your goal. That outside front tire has to have full contact and traction during hard cornering! I don't see that the UDR has any provision for adjusting camber, so you may have to live with the "nature of the beast" wearing tires as it does. It would be cool if Traxxas could add camber adjustability to the UDR though! But I think that your stuck with the tire wear issue even with the toe adjustments that you made. If I'm wrong, let me know, I plan on having my UDR very soon and your feed back regarding this is very helpful!

[@06goatm6]

What you're trying to describe or correct is called bump steer. It comes from the tie rod being at a different angle or location than the lower control arm. While adding adjustable tie rods will allow you to change the toe, it will still change with suspension deflection. The toe adding while turning is typical of all Ackerman steering systems. The camber change while turning is from the caster (the more the lower ball joint leads the front) more caster adds more camber while turning, usually a desirable trait. I think rotatng the tires will help a lot. And to be scale correct you should rotate them 7x as often as you would on a regular car haha.

[@wolfguard1180]

I run an almost full vitavon front suspension, and it helps eliminate the flex that the plastics had. The stock parts flex under load.

[@rccosplay3249]

I got the GPM adjustable steering links and all is good. Runs straight as a arrow! I do use the TSM. I do notice that the front tires do wear out more on the inside than the rear.

[@user-rx8qq8sk9ydv1ce5ib]

Thanks for sharing.. Have you thought of using a spacer. ? thx. I think you should have also used a measuring tape to compare before and after.

[@orbitaljellyfish808]

You’re talking about bumpsteer and Ackerman, and those under extreme body roll conditions. My guess is Traxxas is solving for multiple conditions with a focus on stability. You may fix tire wear to find the driving squirrelly. Have you tried adding foam inside the front tires to support the sidewalls?

[@jamalreid651]

Toe angle is good. As you throttle forward the wheels will tend to pull backward to straight (ish)

[@jamalreid651]

It's a Samberg issue. Toe is how close the front of the tires are in reference to the rear. Camber is the angle front top to bottom of the wheel.

[@jamalreid651]

My bad. Should have said camber issue.

[@duramaxdad]

Toe, camber, caster. Toe in toe out. Like pigeon toed. Camber is how flat the tire sits on the road. Top of tire in or out. Caster is the angle of the steering knuckle. This truck has zero adjustment for any of these when stock. Custom toe kits exist.

[@FishingPhoFun]

Sounds like your talking toe and camber but getting them mixed up. But your right it is toe in. All cars real and RC will have slight toe in for tracking.

[@jlo96f3]

Yeah, I got the adjustable rods by hot racing. The only issue is if the vehicle cartwheels the rods will snap at the threads, which is a good/bad thing.

[@guitarzzero]

Hey man, I think what your looking to change is Ackerman and Camber gain…

[@bostonblizzards]

What you described as toe in the beginning is actually camber, but later you describe toe properly. The toe angles changing during the suspension cycle is bump steer, it’s caused by the suspension geometry. The wheels pointed in different directions when turning is called Ackerman. Typically, toe in is used for more straight line stability. Since the truck is solid axle, rear is not adjustable, so they toe in the front to help with stability. Toeing the vehicle out would make it more sensitive to steering and road changes, possibly making it more difficult to drive. You’re getting that wear on the edge of the tire more so due to the tire rolling over on itself in the corners

[@16abind]

Insightful. Thankyou

[@oliverknipp9885]

Hello...It was patented in 1816 by Rudolph Ackermann (Germany) and is therefore named after him. Nowadays it is called A-Steering. With the Ackermann steering, each wheel of the steered axle is turned separately and has different steering angles. In the automotive industry, the correct steering angle is usually achieved using a mechanical arrangement, the steering trapezoid (see figure on the right). The correct steering angle for each wheel (also called Ackerman angle) depends on the dimensions of the vehicle (wheelbase, track width, steering radius). Best regards from Germany

[@jalee6587]

The tire outside edge wear on front tires is due to steering and having to change directions of the truck.

[@billreynolds2221]

Designers/engineers consider performance and longevity of vehicle components. I suspect you know this already. As you mentioned, rotating tires will help minimize this issue.

[@311tube]

You were showing camber at the 5 minute mark. There is no camber adjustment.

[@richardpaul1114]

that is camber not toe

[@rastanonascension5246]

So when you get the gpm front suspension arms ,the front binds up even more!!!! The rods!! 2 Allen keys 1 in the middle hole other in plastic part of rod end!!

[@MadMax-td4ed]

My stock tires are completely bald I recommend proline tires for a replacement they actually do a lot better with wear

[@darrenkopp4933]

towed in like that's to keep it stable at high speed the rear wheels on my drag slash is the same way an your gonna eat tires all part of it

[@brandonshultz2925]

Lmao!! I have and love my UDR . Also have a the XMaxx . Do a video on those tires. Just saying....

[@Killa_b_rc]

What chassis plate do you have?

[@jimmynavarro3760]

Gpm is very very low quality aluminum and has zero QC before parts leave. Try vitavon racing development or hot racing rc for parts. I have a udr that I'd put up against any other in class RC's.

[@JaxsonM22]

Great video, have the same issue with my udr. I'll probably get the upgrades you got in this video. Can you make a video on how to keep your udr suspension so smooth? Or maybe just tell us what you do to keep it smooth. Just a suggestion can't find to many videos on udr suspension care.

[@16abind]

I'll give that a thought.. actually an interesting point because I didn't realize how bad my first udr was when I bought it until I bought this one. I was like oh wow. It's actually way smoother than the last one. Definitly will keep that in mind. Also I don't know if that upgrade is actually gonna help the issue. Still all theory yet. But from the knowledge I have I think it will. Haven't tested it out yet.

[@tanforce2564]

I’m having the weirdest problem, I replaced this worn out tire with one of the spares and the nut melted through it

[@timwalter7653]

The wear is caused by cornering weight transfer you will continue to have this problem

[@jalee6587]

It rolls over because it is very top heavy compared to the slash. The full roll cage the 2x full sized heavy ass tires mounted way up high. This truck will want to roll super easily.

[@WANAKO503es]

Is the same like real cars same same

[@taztaz728]

andrew imma waiting for ya to make a 65 pontiac RC body for that buggy!

[@martinhogqvist171]

This video took the term ”over complecate” to a diffrent level😳 its a toy, and its a trophy truck with ridiculous amount of suspension, geometry will not be perfect thru the whole spectrum with such amount of movment, its not possible. And again its a toy…

[@16abind]

Sure. But I think it's fascinating the engineering behind it. And it's a toy also applies to real life cars and trucks as well. Same exact problems engineers work on all day on your car in your garage.

[@28EduardoSierra]

Rotate them and they'll wear even ifs will always wear uneven no matter how great of an alignment you have as the suspension travels camber angles change regardless rotate them

[@mikewatson5570]

thats not toe! thats camber, toe is how much the wheels are pointing in or out front to back not up or down

[@16abind]

I know that. Maybe I mixed it up in the video.. toe is definitly what I'm talking about in the video though.

[@traxxas_cars160]

My complaints on this truck are the front bumper design, tires wear fast, the body is to thin, the pinion gear is weak, and the driveshaft kinda sucks and that’s about it

[@bneil4059]

Along with the tire wear the seats aren’t very comfortable.

[@Bradskoi]

That’s called tyre roll aka turning at some sort of speed the tyre rolls and it give the car more grip my one does the same thing if you get a laser on it there dead 90 degrees

[@user-rx8qq8sk9ydv1ce5ib]

All my RCs are never exactly aligned, they will never be like a real car.

[@jalee6587]

You should be rotating the tires . When you steer the tires are also going to wear on the edge tring to change the trucks direction. Looks like your a noob

[@malky525]

Thats bad. I'm canceling my udr order first thing Monday. How can a company release such a problem!... So you buy more tyres!!

[@traxxas_cars160]

On my udr my INNER tire wears more

[@robertruffin5132]

Dude get a hair cut.

[@orion000]

Yea dude wtf

[@johnuribe7695]

That’s called Camber. Not toe.