Biggest tyre to fit under factory spare wheel cover?

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

It depends on the tyre and how square the shoulders are. The 150 cover is more generous than the 120 version. A few guys have managed to fit Bridgey 697s in 265/70 under the 150 cover. Not sure about KO2s. My cover is keeping the dust off a shelf in the shed...

[nanbar Senior Member Find all posts View Profile Close nanbar]

Given that some people say the 265/70R17 fits and other say it doesn't, I want to make sure that the 265/65R17 fits okay and isn't a pain the the butt to fit.

Manufacturers and models are all different, so, I didn't want to just assume that it would fit like the GrandTreks.

Sorry mate, I'm an engineer, I think differently. A spec is a spec. A 265/65/17 is 776.3mm tall (no matter who makes it). A 265/70/17 is 802.8mm tall (no matter who makes it). Its 26.5mm taller which is the bulk of the problem as far as fitting it under the wheel cover goes. Thats what I think, happy to be proven wrong but maths don't lie.

[geege Junior Member Find all posts View Profile Close geege]

I believe the dimensions are nominal and dependant on tread profile, manufacturing tolerances, etc

If you look up the same sizes in different manufacturers and tread styles, you'll find the actual outside diameters differ

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

I believe the dimensions are nominal and dependant on tread profile, manufacturing tolerances, etc

If you look up the same sizes in different manufacturers and tread styles, you'll find the actual outside diameters differ

Sorry mate, I'm an engineer, I think differently. A spec is a spec. A 265/65/17 is 776.3mm tall (no matter who makes it). A 265/70/17 is 802.8mm tall (no matter who makes it). Its 26.5mm taller which is the bulk of the problem as far as fitting it under the wheel cover goes. Thats what I think, happy to be proven wrong but maths don't lie.

Sizes are not exact. Brand to brand actual dimensions vary for the same size.

[Guest Close Guest]

Sizes are not exact. Brand to brand actual dimensions vary for the same size.

That's right. There's this thing called tolerance. All dimensions on an engineering drawing have a tolerance attached.

[JustinS Lurker Find all posts View Profile Close JustinS]

Sorry mate, I'm an engineer, I think differently. A spec is a spec.

In principal @nanbar, I agree with you, but, it seems the manufacturers don't. As others have said, there are tolerances built in and differences in things other than just diameter (eg. sidewall tred angles) that can affect the fit.

All that I'm asking for someone who has actually done it with this model of tyre and and size of tyre to say that it fitted well, fitted tightly or didn't fit.

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It'll fit

[Retreads Junior Member Find all posts View Profile Close Retreads]

A good way to check the diameter is using a simple formula: A x B/500 + C x 2.54.
in the case of a 265/65/17 tyre, A=265 B=65 and C=17
the result being 265x65/500+17x2.54= 77.63cm where as a 265/70/17 would result in a diameter of 80.28Cm so If the diameter of the factory spare cover is 80cm it probably wont fit unless you really squeeze it.

If the cover is >80cm in diameter I would think you would be fine but I cant speak from experience.

[nanbar Senior Member Find all posts View Profile Close nanbar]

In principal @nanbar, I agree with you, but, it seems the manufacturers don't. As others have said, there are tolerances built in and differences in things other than just diameter (eg. sidewall tred angles) that can affect the fit.

All that I'm asking for someone who has actually done it with this model of tyre and and size of tyre to say that it fitted well, fitted tightly or didn't fit.

I fully understand the concept of tolerances, the +/-'s we would be talking about here are 2 tenths of SFA when compared the 800 odd mm of tyre height. Slight variances in manufacturing tolerances btw manufacturers will not be the difference between a tyre of the same size fitting and not fitting under the wheel cover.

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

The OD for 265/70 17 isn't fixed at the calculated 265 x 0.7 x 2 + 17 x 25.4. For one thing rim width affects diameter and different tyres have different tread depths and different diameters as specified by the manufacturers.

The tyre profiles vary as well with squarer sidewalks, deeper sipes and so on.

For example, 265/70 17, calculated to be 803mm:

BFG KO2 - 804mm
BFG KM2 -806mm
MT MTZ - 810mm
MT ST2 - 803mm
MT ATZ - 810mm
Cooper ST - 809mm
Cooper AT3 - 804mm

Etc.

[wheelan Lurker Find all posts View Profile Close wheelan]

So the guys that take the cover off, I am assuming you lose the rear camera? have not yet picked up my car yet, so dont shoot me for asking a stupid question!

[Guest Close Guest]

The reverse camera stays on when you remove the cover.

[Rdae1981 Junior Member Find all posts View Profile Close Rdae1981]

Looking at upgrading the wheels on my 150 wanted to know if the wheel cover will still fit on with aftermarket rims 8.5/9 inch wide dressed with 265/65/17 KO2's?

[Bushki Junior Member Find all posts View Profile Close Bushki]

The new 275x65x17 BFGoodrich All Terain KO2 fit under the cover.

[bazzang Junior Member Find all posts View Profile Close bazzang]

Mickey Thompson STZ 265/70x17 fit under the cover with no issues.