Morning/Afternoon

Recently i was driving my car and when i throttle it the wheels tend to vibrate up and down... but i cant see whats causing this problem.. any great suggestions is well appreciated also is a quick reply


Thanks David Kirkbride

is it the front wheels? That had happened to me once, it was because my front wheels were unbalanced because i had slightly smaller wheel bearings, so check your bearings and make sure they fit.

bearings? what are they ? where are they located.

ok noobie heres how it goes, bearings are located in the middle of the rim where it connects it to the car, evedently you've never taken the tires off[sm=lol.gif]

That was rather mean.

yeah but it was a stupid question sorry if i affended him

ok, i just removed rim.. doesnt seem like thres any rings or bearings of any sort.. i have steel hub cap things... could they be inside there? cause it has a allan key thru it

it would be inside the wheel not on the Axel. Look in there, and replace if needed

aaa k what adzactly do i need? and where in UK can i purhcase?

if possible could someone give me part number... i dont know what im looking for


Thanks David Kirkbride

um i dont know where to buy parts in the U.K. but if you want search bearings in www.towerhobbies.com and start from there

Before you look all over for bearings, which may or may not be bad...Take the wheel/tire that you just removed and shake it around...If there is dirt rolling around in there, there is your balance problem. I have found that the breather holes in the rims let in some grit, and don't let it back out, and after some time it just gets worse and worse...Plus the grit in there is slowly eating away at the foams in the tires.
SOLUTION...
Drill small holes in the tires between tread lugs as close to the center line of the tire as possible. I usually drill 2 holes in my tires. 1/8 inch drill bit in dremel tool works good.

Once your wheels are empty of excess material, or when you put together new rims/tires/foams, you can set about correcting the imbalance that probably still exists. Just like 1:1 scale wheels and tires, to get the best performance out of them, they have to be balanced.
I don't have a fancy balance stand. I just disconnect the drive line from the axle, and let the wheel spin free.(now is the time to service those wheel bearings, if they need it.)
Gently spin the tire, and mark the top of the tire when it stops. Do this a few times to insure the wheel spins freely, and the heavy spot settles to the bottom.
Now glue pennies, brass bushings, nuts, bolts, fishing weights, or whatever else you can grab to weight the inside of the rim.
I usually just use brass bushings from old projects(see signature[sm=50_50.gif]), and glue them with tire glue.

There!! Now your wheels don't wobble, and your acceleration has improved, and your top speed is higher, and it handles like it's on rails...NOTHING can stop you now!!!(except that parked car...[:@])

yeah check his tip first if there is no dirt buy new bearings!!!

thanks doods ill do that :P

ok tell us if it works or not, and well go from there

hmm i think there is mud in the wheel or doggy poo :P out of my back garden as i roll the wheel forward and it rolls back a 1/4 of a turn.

what do i do ?!!?!?!?1!?!!?!!?1?1?1??!?!?!?1?!

ok what kind of car is it well it shouldnt matter, anyway, if you push it and it rolls forward and when its just about doen rolling forward and it finally sort of stops and then it rolls back a little, thats your gears, i tihnk im not sure, tell me if your car is nitro or electric and what kind of make is it.

I'm assuming from your signature that it's an MT2. To check your balance, you have to remove the dogbone, so there is nothing touching the axle. If it has cvd's, then I don't know what to tell you. I don't advocate disassembling cvd's unless you are fixing or rebuilding that part. Less chance of losing a setscrew and pin next time out.
Maybe set up a hub carrier in a vice, with an axle on bearings...

I don't know what the weight difference is between garden dirt and dog poo, but either one will throw balance off. If you ever see the fast guys at the track, they get out the brushes between runs and scrub all the dirt off the tires to keep their wheels spinning true. I don't go to that extreme(I'm not one of the fast guys at the track either...coincidence?), but I do give most of my wheels a balance attempt. Not only does it help handling and speed, it reduces the load on the bearings and hinge pins, and reduces stress and vibrations that can cause screws to back out, causing your truck to jettison pieces necessary to continued operation.

hmm well i dont think its the gears.. i took the wheels of and i roll them quite hard and they seem to roll back on pretty much the same spot every time. im gonna let em dry.

its the gears, when it rolls it spins the gears and and when it stops it has to get in a tooth of the gear if your running a small spur gears then thats your problem...