F type alloys on XKR

[just0007]

I am hoping someone has tried and succeeded, I have a 2010 XKR and I have by accident bought a set of F type wheels. They are 10.5 inch wide instead of what I have which are 9.5 wide. Should I try and fit them or am I going to have issues?

Any help or advise car would be appreciated.

[8bit]

What are the offset (ET) numbers on the F-type wheels?

[just0007]

Thanks I will check when I get home

[just0007]

Hi 8bit the rears are 38mm and the front 52mm, any help and advice is appreciated, I should have asked before buying them

[8bit]

That doesn't look right, according to www.wheel-size.com most F-type wheels of 10.5J width should have an offset of ET25. Can you post a couple of photos, particularly showing any number markings?

[just0007]

Tried to take a picture but they are black gloss so the numbers become eligible they are the gyrodyne wheels and they are 10.5j and 38mm rear and 9j 55mm.

If I get time this week I’ll swap the tyres from my current alloys to these and see what happens

[Simpo Two]

And on an XK/R the rear wheels are wider than the fronts, so if yoyu have four all the same at least two have to be wrong surely...?

[8bit]

just0007 said:

Tried to take a picture but they are black gloss so the numbers become eligible they are the gyrodyne wheels and they are 10.5j and 38mm rear and 9j 55mm.

If I get time this week I’ll swap the tyres from my current alloys to these and see what happens

Well I'd never fit incorrect-sized tyres so even if you're going to go ahead and use them then you'll need new ones - but if you can then try jacking the car up, removing one of the existing wheels and fitting one of the new ones. Remember as Simpo says that you have staggered sizes, so try one of the larger ones on the rear and the narrower ones on the front. So long as they don't found on the brakes then you *should* be OK. If possible, have both sides at the front jacked up at the same time so you can turn the steering side to side to check the fronts don't foul on the suspension.

[just0007]

Thanks for the advice, the tyres are the same 295 on the rear and 255 on the front it’s only the rear rims are an inch wider. I have the 20inch XKR wheels and instead of a £500 refurb I thought I would get a different design. Once I have them on the car I’ll state the update, hopefully it might help someone else.

[Squishey]

By the looks of things the standard XKR wheels have an offset of 45mm front and rear.

This means that your new front wheel (52mm offset) will be 7mm further from the hub, i.e. the outer face of the wheel will be closer to the edge of the wheel arch, so probably more clearance between the wheels and the brake calipers but potentially they could protrude from the wheel arch.

The rears (38mm offset) will be 7mm further in board, i.e. the outer face of the wheel will be further away from the edge of the wheel arch, so potential clearance issues with the rear brake calipers. Also with there being a 14mm difference between the distance the wheel outer faces are from the wheel arches it may look daft!

In summary, get a set of 14/15mm spacers for the rears and I expect it'll be fine

[anonymous-user]

Squishey said:

By the looks of things the standard XKR wheels have an offset of 45mm front and rear.

This means that your new front wheel (52mm offset) will be 7mm further from the hub, i.e. the outer face of the wheel will be closer to the edge of the wheel arch, so probably more clearance between the wheels and the brake calipers but potentially they could protrude from the wheel arch.

The rears (38mm offset) will be 7mm further in board, i.e. the outer face of the wheel will be further away from the edge of the wheel arch, so potential clearance issues with the rear brake calipers. Also with there being a 14mm difference between the distance the wheel outer faces are from the wheel arches it may look daft!

In summary, get a set of 14/15mm spacers for the rears and I expect it'll be fine

It’s the opposite of what you say. The 52 offset will be further into the arch, the 38 further out.

The number is the distance from the mounting face of the wheel to the centreline of the wheel. Make it bigger wheel moves in; smaller, out.

[Squishey]

Yes, indeed you're correct Realist. D'oh!

My response above is right if you swap the words "front wheel" and "rear wheel" around!

[just0007]

Good news, I thought I should updat the thread. They fit and I’m chuffed. No rubbing over speed bumps, fronts have got a 20mm space and the backs are feet. Phew I was a little nervous

[just0007]

[8bit]

Glad you got it sorted.

[just0007]

Thanks for your help 8 bit