Hi Taffy, yes, they are wheel balancing weights . . . if some have fallen off (did you actually find them?), then I would recommend you get your wheel balancing checked at a tyre fitters . . . however, you might also see patches where weights have previously been on your rims if tyres have been re-fitted on your car, so they may not have fallen off, they may have been deliberately removed. Personally, I have never known weights to fall off, although anything is possible, but they are usually stuck on very firmly indeed.
I'd take it in a shop to make sure the wheels are balanced if you are certain that some of them have fallen off. I also suggest asking if they have darker colored weights for black rims as they blend in a lot better. Definitely made a difference on mine.
Cheers catwoman .. never had a new car with new wheels needing balancing weights before. Not sure why Jag use them.
I found one or two weights on the driveway, discarded them as I didn't associate them with the car, so they've definitely come off the car
I've had some instability, whilst others have cited none, and suddenly started to add 1 and 1 together. Sounds like a trip is needed (any excuse to get behind the wheel )
Eh? There are variations in material thickness within the wheels, and - more importantly - within the tyres. You add weights to avoid these variations causing wobble/hop at high speed. If you take the tyre off and replace it in a different position on the alloy, you need to reassess and add different weights to balance it up.
This is an issue that affects all manufacturers. It is far from a Jaguar-specific practice. :?
All I know is what I know. I"ve had a Merc Benz C250, BMW 330d, 340i and a Lexus NX, all when new had zero sign of any weight balancing on any of the wheels.
Maybe the issue that Jag are doing it right, and MB, BMW and Lexus are all doing it wrong
Good point Peterjohn, I hadn't thought about pressure washing loosening weights. Pressure washing can be brutal even on paintwork as well, if done too closely.
Wheel weights are usually put on the inner sides of the wheel so you might not have seen them. Whilst the wheel castings may be almost perfect the tyres will have manufacturing variations so there will always be some weights applied to the wheels.
Standard practice for all manufacturers to add balance patches on new wheels. Just be careful when using the power washer - you shouldn't be washing at such a high pressure near bodywork in any case.
Perhaps some manufacturers are better at hiding the weights?
I managed to dislodge one with a pressure washer this week. Got some spares off ebay in black, wiped area with some Isopropyl Alchohol to get good adhesion and stuck a weight back in the same size as the missing one, which was 10 grams.
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