When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have been trying to source the right set of BBS wheels to accomplish the BBS wheel upgrade. Long story short have managed to get 5 BBS Milan wheels from two different sources. Although I was clear in my comms with both sellers, 3 wheels are '81/2 J X 18H2 ET33' and two are '9J X 18H2 ET35'.
Here is the quandary I am trying to resolve:
a) Am I able to use the same width tire on all 4 wheels and have the 81/2 J X 18H2 ET33 in the front and 9J X 18H2 ET35?
Just want to ensure that this set up has no negative impact on the ride quality, alignment, differential etc.
If to get it done right I need to have all 4 wheels the same width and offset then that is what I will pursue just need some clarity from fellow forum members to make an educated decision.
Many thanks in advance for your inout with regards to this matter.
Good choice of wheel, I like the look of them particularly with champagne coloured centres on a Carnival red R, very smart - brilliant silver looks excellent on darker cars particularly Anthracite or Sapphire blue.
I think you can get away with the same tires all round. A few run XK wheel sets with the 9" rear wheels, and these could be the version you're looking at. I thought the XJR sets were all 8.5" round, could be wrong. You can run 18" 9" rears without rolling the inner wings.
Ride quality, component wear and alignment are not affected by going bigger, my car came with 19" as standard, and feels just the same on 20". Suspension geometry was taken care of at the factory
Congrats on these rims, they are beautiful on the x308.
I have answered your PM on the staggered set-up, but one further small remark here about the 5th (spare?) rim, as there is a lot of conflicting information on the net.
The XJ40~X308 spare wheel-well was originally designed to accommodate the ~225 width tires.
However, when (rim and) tire size grew, I guess Jaguar ran into a problem that full spares were simply too wide to fit under the floor-board.
They solved this by offering the compact spare for cars fitted with 255 tires.
But for people choosing the full spare option, they modified the floor-board with a hump, to create more space below it.
Anyway, in your case, a 8.5J with a 245 or 255 tire will only fit if you got this humped floor-board.
A straight floor board will be slightly lifted by a 245, and not fit with a 255.
I sourced a X300 humped floor board, it looks kind of cool, but makes the trunk even more impractical due to the uneven floor (internet sample pic).
Last edited by ericjansen; 03-07-2018 at 10:29 PM.
Reason: Edited to correct applicable models
Britrover, as you requested, some pictures of the rear bump stop before modification, which slightly intervenes with 275 tires on the ET35 rims.
I 'halved' them, still works fine and sufficient clearance.
Congrats on these rims, they are beautiful on the x308.
I have answered your PM on the staggered set-up, but one further small remark here about the 5th (spare?) rim, as there is a lot of conflicting information on the net.
The XJ40~X308 spare wheel-well was originally designed to accommodate the ~225 width tires.
However, when (rim and) tire size grew, I guess Jaguar ran into a problem that full spares were simply too wide to fit under the floor-board.
They solved this by offering the compact spare for cars fitted with 255 tires.
But for people choosing the full spare option, they modified the floor-board with a hump, to create more space below it.
I think this happened on the X300 for the XJR's, but I don't think it was an option any more for the X308 (compact spare only for 255 tires).
Anyway, in your case, a 8.5J with a 245 or 255 tire will only fit if you got this humped floor-board.
A straight floor board will be slightly lifted by a 245, and not fit with a 255.
I sourced a X300 humped floor board, it looks kind of cool, but makes the trunk even more impractical due to the uneven floor (internet sample pic).
Eric
My 01 XJR, US'specs car came with an Asteroid with a 255 on it and has the hump
Re: the 'bubble' type boot board, you can fit a full size rim and use the original board with the 3x support brackets. Have these been fitted? BEC25246.
The other part that aids support is the Spare wheel clamp screw MJA6190BC (standard wheel not space saver).
Re: Eric's rear bump stop mod - Jaguar addressed this with the R option stop part #MNA3750AB.
Re: the 'bubble' type boot board, you can fit a full size rim and use the original board with the 3x support brackets. Have these been fitted? BEC25246.
Sean, can you elaborate here, cause I don't understand what you mean?
My board is at the front fitted in the small recess in the tank carpet (and laying on the brackets underneath - red line in the pic), and at the rear at the usual place on the plastic trunk cover.
With a 225 it fits perfectly, but with a 245 and 255, the sidewall of the tire is simply higher than those 2 points, lifting the board up.
I don't really see how other (?) brackets will solve that.....
Love the other bump stop though ... might buy a set.
Both my 95 and 98 VDP's came with a full size spare on a matching rim .... when my 98 was totaled and I bought the 02 R it had the small spare and flat floor. While I appreciated the flat floor, did not like how the floor fell down when loaded. Recent thread I mention my car has only one of the black plastic supports along the gas tank. I told the dealer about this at the time ---- I never noticed the black support until a few weeks ago when I was in the trunk of my other 02 R .. this car has all 4 brackets. I have no idea if it came through this way .. it's a later 02 ... or the previous owner did it. W/O the rear supports the trunk has only a foam support on top of space tire.
I have only needed the spare once in all these years ... the flat floor is preferable. In my case it was enough that a second large suitcase would not fit.
Sean, can you elaborate here, cause I don't understand what you mean?
[/IMG]
Sure Eric, pictures help I'm sure. The wheel is a 19" 255 and fits perfectly - but the boot board is completely flat, it isn't angled down towards the cabin of the car (Like in the Parts diagram) The brackets locate and support the rear as on your car, and the centre is supported by the spare wheel bolt, mine is about half an inch high because I didn't screw it down level...It looks to me as if you need a flat board for a flush fit, and I need to wash mine (embarrassed face )
Sure Eric, pictures help I'm sure. The wheel is a 19" 255 and fits perfectly - but the boot board is completely flat, it isn't angled down towards the cabin of the car (Like in the Parts diagram) The brackets locate and support the rear as on your car, and the centre is supported by the spare wheel bolt, mine is about half an inch high because I didn't screw it down level...It looks to me as if you need a flat board for a flush fit, and I need to wash mine (embarrassed face )
Thanks Sean, and not intending to wage a discussion here on someone's else thread.
But I guess Britrover will face the same problem soon .
That pic looks pretty much like the situation I faced, the floor board raised half an inch higher than the smaller board next to it.
I have the exact same flat board, and the sidewall of the tires simply prevents the board from dropping further.
No way a bracket is going to solve that.
It probably depends a bit on how much their sidewall bulges (tire brand, rim width, etc), but I guess Jaguar did not invent the bulge for nothing .
PS. The x300 floor board I sourced had the exact same dirty stains.
I soaked it for a while in carpet cleaner, then carefully brushed it, then let it dry.
Re-glued all edges as the original glue was disintegrating as well.
Like new!
Last edited by ericjansen; 03-09-2018 at 07:37 PM.
@ Sean B - 'Re: Eric's rear bump stop mod - Jaguar addressed this with the R option stop part #MNA3750AB'
Am I correct to assume that I will not need the bump stop mod or part #MNA3750AB' for the 275 size rear tire as I am planning to do this on an XJR?
I am beginning to lean towards going with a staggered set up. Original plan was to get a set of Perseus wheels and as I did not get them perhaps BBS Milan in a staggered set up will be my compromise .
Am I correct to assume that I will not need the bump stop mod or part #MNA3750AB' for the 275 size rear tire as I am planning to do this on an XJR?
I think Sean meant that you can save yourself the work to halve the stops if you either already have, or buy the modified Jaguar ones.
I just went down to snap a pic of mine through the wheels, this is the 'on the ground' location of them.
As mentioned, my XJ8 ones only interfered with the car on the lift, wheels hanging, but I did not want to take the risk, plus the inconvenience during installing every time.
All this is with 275/40R18 Toyo tires on 9J ET35 rims.
Hey Eric, by doing this halve out procedure will prevent this from happening again
Frankly, although it looks pretty serious, I doubt this is caused by the bump stops.
Observing the worn 1/2 inside of the tire profile, it seems much more a mayor alignment problem to me.
On my car, with the car on the lift, the wheels hanging full travel down, the bump stopped interfered half way the side wall, not the top.
With the car on the road, statically, there is no interference.
Dynamically, I can only see interference after a big bump, the suspension extending, but then the damage should be on the sidewall of the tire, not the top.
Last edited by ericjansen; 12-14-2018 at 06:32 PM.
03-07-2018, 10:12 AM
XJR Wheel Experts: Please weigh in
.
