Just changed all 4 brand new 18" rims with all 4 new tires. Already done alignment and balancing for both front and rear. The front wheels done high speed balancing summore.
Initially felt ok but upon reaching 140-160 kmph, the car start vibrating. My butt felt like the origin of the vibration is from left rear, but when recall back during balancing - no issue at all.
The vibration intensify during accelerating and minimize during throttle release. Felt like worsen if accelerating during taking left corner rather than right corner at highway.
Just changed all 4 brand new 18" rims with all 4 new tires. Already done alignment and balancing for both front and rear. The front wheels done high speed balancing summore.
Initially felt ok but upon reaching 140-160 kmph, the car start vibrating. My butt felt like the origin of the vibration is from left rear, but when recall back during balancing - no issue at all.
The vibration intensify during accelerating and minimize during throttle release. Felt like worsen if accelerating during taking left corner rather than right corner at highway.
May I know what I need to do or expect? Billions of thanks in advance.
Does the vibration go away after 160kmh? If yes, then most probably it come from your new rims or tyres
This post has been edited by wanfumi: Jul 29 2020, 09:05 AM
That high speed balancing with spinner on the side and spin tire on car?
I think it is more like traditional but with higher rotational speed. It still detect tire wobble sideway or lateral force. The longitudinal force like when tire hit the road can cause vibration due to uneven tire thickness.
Make sure the round dot on tire (can be solid red or white circle) is aligned to the valve stem on the wheel. That is where the centrifugal is the highest in relation to the force the rotating tire is puilling away from wheel (most call it rim). Yes, tire is not prefect
Maybe this video can help understand the other force.
check your hub got the center cone or not first, aftermarket rims usually doesn't fit perfectly into the hub, you will need the center cone to fill the gap, something like
That high speed balancing with spinner on the side and spin tire on car?
I think it is more like traditional but with higher rotational speed. It still detect tire wobble sideway or lateral force. The longitudinal force like when tire hit the road can cause vibration due to uneven tire thickness.
Make sure the round dot on tire (can be solid red or white circle) is aligned to the valve stem on the wheel. That is where the centrifugal is the highest in relation to the force the rotating tire is puilling away from wheel (most call it rim). Yes, tire is not prefect
Maybe this video can help understand the other force.
check your hub got the center cone or not first, aftermarket rims usually doesn't fit perfectly into the hub, you will need the center cone to fill the gap, something like
basically in plain English, if the lobang at the center of the rim is bigger that the stub on your axle you put a countersunk cone to fill the gap... but you said your rim is build for your series then you shouldn't need a centercone.
seems like u are down sizing from 19 which should be lighter. unless the previous 19 causing some extra wear.
you said it happens when accelerating and goes away right as you release the throttle. the difference here is weight transfer maybe something is rubbing as your car squats.
also, no need to fill with nitrogen la. its something people sell u to lighten your wallet
If it's not balancing issue, and the vibration is more profound during acceleration, while it only happens at a particular speed range, it could be the drive shaft.
Hoist the car up, check the coupling, inner & outer drive shaft.
If it's not balancing issue, and the vibration is more profound during acceleration, while it only happens at a particular speed range, it could be the drive shaft.
Hoist the car up, check the coupling, inner & outer drive shaft.
QUOTE
A bad half shaft can cause vibration at your steering wheel when travelling at low to medium speed. We are talking about roughly in the range of 50 kilometers per hour.
But my vibration only start at 140KMPH. And how convenient to arise right after I changed my rims and tires.
Try redoing the balancing at Kee Hin Old Klang Road. They're the best in KL. It appears your balancing is kinda near the correct point but it could be off by say 1g or so then at 0-130 no issue but when you're going at high speed that margin of cumulative inbalance intensifies so you will feel the vibes.
Jul 29 2020, 08:54 AM, updated 6y ago
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