some 15 spoke alloys
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BMW 528i 540i 745i 740i NOT OEM 18 WHEELS RIMS M style 18X8 5 SERIES

 

 

some 15 spoke alloysBMW 528i 540i 745i 740i 18 WHEELS RIMS M style 18X8 5 SERIES

 

some 15 spoke alloys 18x8

 

Sorry, I did not mean to ask a stupid question, I wasn't sure that maybe you had decided on another BMW wheel or if you were sticking with your original choice

 

If a tire of relatively equal width to an 8" wheel is used (8" + rt. side 1/2" flange plus lt. side 1/2" flange = 9" total width = 228.6mm, so a 235-series tire), then Bernard Embden's site on upgrading his XJS to 8" wide wheels showed that a 235-series tire at 20mm rear offset would just clear the rear fender edge (though slightly rub on the inside fender liner at full travel).

Exactly. If you want a fat rear tire, then a 20mm offset 8" wheel will almost definitely rub on the rear, but if you use a 235 series tire, it should be right at the limit of how far out the rear tire can be, unless you get some brand with an unusually funky sidewall edge shape.

 

I don't think this is something you can calculate with the above formula because it doesn't take into consideration the bulging sidewall (section width) of the tire. That's the part that actually rubs the inner quarter, not the "235" part - that's only the tread width. The sidewall is always wider than the tread width when mounted on a suitable rim.

Based on Bernard's experience, I think the end-story reads like this: You can use a 17x8 20mm offset wheel on the rear of your XJS, but with a 235 series tire, it is going to rub under significant suspension travel.

 

i have 9" wide fronts and 10" rears ,18" ENKEI. with spacers machined for no rubbing at full lock.

275-35-18 Nitto tires. so far 16yrs, been ok, sometimes but rarely, i have a slight rub.
not enough to worry me tho!

pix

 

pix

 

and i know i should buy new tires, i have little over 5K on them, Nitto must make a good tire, no dry rot yet!

 

I am wondering if my wheels from 2001 XKR will fit the XJS?
I have stock 18" rims on it and if anything, I'd rather upgrade wheels on XKR, then on this my 1982 Leyland Motors XJS, I am still trying to finish.

 

Wow, something about those wheels makes the rear wheel wells look huge. They're not aftermarket, are they?

 

Adding an inch for the wheel flanges just lets you know what the true wheel width is. I agree that the outermost part of a tire is the bulging sidewall. Whether or not it is the upper sidewall that contacts the inner rear fender liner at full travel vs. the outermost edge of the tread section will depend on the tire shape and the angle of the inner fender liner. I honestly don't know what exact part of the tire would hit the inner rear fender liner on an XJS.

I agree—there could be some rubbing, but according to Bernard only of the inner fender liner and only at full suspension travel. This is quite different from the tires protruding far enough out that they scrape/impact the actual fender lip. Most folks in my experience are willing to live with a little inner fender liner rubbing at full suspension travel in the rear and at full turn lock up front, as this causes minimal to no real damage to tire or liner, as opposed to interference with the actual fender lip, which would necessitate rolling or slight fender pulling to correct.

 

You're right, that would be tough to calculate. However, I think it's pretty clear from Bernard's pictures that at best the corner of the tire hit the inner quarter. It was certainly not just the tread area. The angle of the fender liner is just too steep - it doesn't turn into the tread area. This is also consistent with my experience, however, I had the benefit of looking at the rub marks on the sidewall of the tire.


I hate to say it, but I disagree with what you're saying here... To say it "could" rub is misleading - it will rub under "heavy" suspension travel. As per Bernard's article, "full" suspension travel is not required, but only "heavy" suspension travel is required. I distinguish that from full travel because he uses full travel when describing the better fitment at 28mm of offset.

So yea, you can use a 17x8 20mm offset wheel on the rear of your XJS, but with a 235/50-17 tire, it is going to rub under heavy suspension travel. In a nutshell, that's what he says. Nothing more and nothing less.

 

fastkat; my rear wheel arches are not factory, i made them out of steel, and originally to fit a 20" tire wheel combo, but it didnt look right, so went with 18-10s rear, so now it is what it is! actually few people notice it unless i bring it to attention.

i may lower the car, about 1 1/2", but donno yet!

and i had to roll the front lower arch, about 1", because of a rub, but all&all, i never have any rub worth mention.

some times we get all worked up over nothing, put the car together and drive it!

 

fastkat; how do you like the LS1 in your XJ6?

i have a 1985 Buick GN, with a LS2,6.0L,4L80E trans, with the full suspension mods, amazing how some Nascar suspension mods can do for a G-Body GM car, it is a great street machine!

 

What do you all think of these wheel situations:
18x8 5 Coventry Hornet 5x120 65 5x4 75 30mm Gloss Silver Mirror Rims Wheels 18" | eBay
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18x8 5 Coventry Whitley 5x120 65 5x4 75 30mm Hyper Silver Mirror Wheels 18" | eBay

Specs seem to be perfect for mounting, not sure about clearing the wheel wells.

 

C'mon opinionated people, little help!?

 

Of the three, I like number 2 the best, but for mine, I am looking for something that resembles the factory "lattice" wheel but in a 17"x 8" but I do not want to pay for the BBS RS wheels. Those I like alot!

 

number 3