hi im new on here i have an xjr 2000 model,
the car has 20 inch 10j all around with 275 35 20(i put on) they do not catch rides very smooth until it hits 50 and then i can feel like a wobble until 85 the wobble is on the foot seats and stearing, also on the motorway over bumps it feels like it will jump of if im doing 100, just to remind they do not have any spigot rings on the wheels but i will get them done tomorow, whats the bore diameter of the hub? could this problem be something else? the wheels are well balances all around.

 

CB is 73.8 mm.

Keep in mind that Hub centric rings assure the wheels are centered during install and then the lug nuts index the wheel and provide the clamp to the hub. However with careful installation and slow methodical tightening of the lugs non-hubcentric wheels can run true.

If the rings don't solve the problem, you might try "Road Force" balancing the wheels/tires.

This of course assumes that the shocks and suspension are in perfect order and are able to deal with the added unsprung weight of the 20's.

 

I would second the idea about getting your wheels balanced. Not sure of the age of your tires, but it may also simply be time to replace them. I also would be concerned about 20 inch wheels simply being too much for the car to handle with it's current suspension set up..

 

check your rear universal joint I just had the same symptoms with my car in the rear universal was bad

 

ive changed the left rear hub today because it was buckled, im looking for smaller wheels to go on this car like 18 but it has brembo brake package, what should fit this not milan though!

 

Just a note to the world . . . I replaced the 20k mile, almost worn out Continentals high performance tires with some real world Continental H rated tires.

I love my car again!

The Z or whatever rating 20k mile gum rubber tires were not satisfactory from the first day despite multiple force and other balancing efforts. Came to the conclusion that if you do not drive the car every day that the super high performance tires will 'set' a flat spot that will take more than I drive to burn out. Next time out I have two flat spots.

The moral of my story is to buy tires based on how you drive not the capability of the car.

 

i need spigot ringz that fit 73.8 and 74.1

 

Did you find the rings. I am mounting up 20's as well and don't want these issues if I can avoid it!!!

 

One good pothole and BAM! Bent rim. Bent rims will balance sometimes and still wobble --- like mine did... Rotated most bent to rear and is all better.