I just put a set of new wheels/tires on my car, and now my steering wheel and pedals shake when i decelerate. It does that when i slow down from around 35 to 15, then goes away when the speed is below 15. this only happens when decelerating from 35 to 15 and not when accelerating or at high speeds. what could be the problem? i know it's not from unbalanced wheels because the steering wheel doesn't shake at high speed.

Try torquing the lugnuts with no weight on the wheel. That is the only way to ensure proper torquing.

if its from 35-15 mph....thats weired. If it was tires or out of balance you would feel it at about 45-65mph. If you put your tires on yourself, make sure the aint on too tight....ya it sounds bogous but a tire tightened to over 70ftb can give the feel of bad alingment out of balance ect...Other wise Im unsure maybe tie rod? or sumthin in the alignment componient end of things.

Does it pull to one side when it shudders? if yes maybe sumthin in frount breaks on one side or other

Ok I just retorqued the wheels to 65 ft-lb with the car jacked up so there's no weight on them. The steering wheel shudder is gone, but the pedal shudder is still there if i brake a little hard. the car doesn't pull to one side when it happens so i doubt it's an alignment or balance problem.
the wheels are rota downshift and tires are falken RT-215. i bought them used last week. maybe i am just not used to the road feedback of performance tires, coming from the stock ones?

U will feel the road and alot more with lower profile tires......it takes a few miles ato get used too

tire pressure?

Ok I just retorqued the wheels to 65 ft-lb with the car jacked up so there's no weight on them. The steering wheel shudder is gone, but the pedal shudder is still there if i brake a little hard. the car doesn't pull to one side when it happens so i doubt it's an alignment or balance problem.
the wheels are rota downshift and tires are falken RT-215. i bought them used last week. maybe i am just not used to the road feedback of performance tires, coming from the stock ones?

Generally any pedal pulsations during deceleration are caused by slightly warped rotors or pad depositions. Do a few 80mph-30mph decels and see if that works. If not, then you probably have warped rotors.

Generally any pedal pulsations during deceleration are caused by slightly warped rotors or pad depositions. Do a few 80mph-30mph decels and see if that works. If not, then you probably have warped rotors.

Sorry but I don't understand what you meant by doing a few 80mph-30mph decel and see if that works. Could you explain it? There is no shudder until the speed gets lower than 30mph.

What could have caused the warped rotors? The shudder happened as soon as I put the new wheels/tires on and wasn't present with the old stock wheels and tires.

By the way, I am running at 33psi in the front and 32psi in the rear.

If you're feeling it in the pedal, it could be the tire mounted onto the rim incorrectly. You shouldn't feel any pulsing in the pedal or the steering wheel.

Did you just tighten the lugnuts to 65lbs on the jackstand or did you take the lugnuts all the way off and re-mount the wheels on the jackstand? There's a difference, you don't want to just tighten the lugnuts to 65lbs, you need to start over completely. You should pull the wheels off and see if there's a problem with the tire on the rim, then remount them from scratch on the jackstand to 65lbs and see if that fixes it. If not, take it to a shop, it sounds like alignment.

Don't ignore this problem, it can be dangerous and mess up your brakes and wear down your tire improperly.

If you're feeling it in the pedal, it could be the tire mounted onto the rim incorrectly. You shouldn't feel any pulsing in the pedal or the steering wheel.

Did you just tighten the lugnuts to 65lbs on the jackstand or did you take the lugnuts off and re-mount the wheels on the jackstand? There's a difference, you don't want to just tighten the lugnuts to 65lbs. You should pull the wheels off and see if there's a problem with the tire on the rim, then and remount them from scratch on the jackstand to 65lbs and see if that fixes it. If not, take it to a shop, it sounds like alignment.

I just loosened the lug nuts and retorqued them to 65 lbs on the jackstand. however i did check the wheels and tires before i put them on and they seemed to be fine.

Generally any pedal pulsations during deceleration are caused by slightly warped rotors or pad depositions. Do a few 80mph-30mph decels and see if that works. If not, then you probably have warped rotors.


I'm going with Evil on this one, before I read his post, I had the same thoughts in my head.

Hotspots on the rotors.
Warped rotors/glazed over pads
Tires mounted incorrectly.
Lugs not torqued on correctly. (Torque to 80lbs in the star pattern, with no weight on the tires - the tires should just barely be touching the ground)

Its possible to have tires freshly mounted and balanced and still have problems. Some machines can't tell that the tires/rims aren't mounted and balanced correctly.

I think i am going to put the stock wheels and tires back on tomorrow and see if the problem goes away. if it does then i know the brakes and rotors are fine, and i'll just take the problematic wheels/tires to a shop and have them checked out.

have you resurfaced your rotors? that could be the problem maybe

i've never resurfaced the rotors. how does that cause the problem? sorry for my ignorance.

i've never resurfaced the rotors. how does that cause the problem? sorry for my ignorance.

Hotspots.

The rotors develope grooves and "hotspots" which makes the way the brake pads grab the rotor surface unevenly. It could produce symptoms like you're describing.

Hotspots.

The rotors develope grooves and "hotspots" which makes the way the brake pads grab the rotor surface unevenly. It could produce symptoms like you're describing.

So does this mean that if there are hot spots, I should feel the peddle shudder no matter what wheels or tires are on the car?

So does this mean that if there are hot spots, I should feel the peddle shudder no matter what wheels or tires are on the car?

That would be an issue with the rotors.

You should still feel some peddle shudder, but an increased sidewall like on the stock tires, might soak up the shudder some.