Thanks to all who replied to my last question, regarding identifying a
wheel.

The follow on is this. I have a Gilbern Invader Mk 3. It is a
rebuild project. It comes on a set of Alloy wheels. 2 are marked
13" x 5,50" and 2 are Marked 13" x 6,00".

The 5.5 are fitted with 185/70 R13 and are on the rea axle. The 6.0
are fitted with 205/60 R 13 and are on the front axle.

The handbook states that the wheels and tyres should be the same as the
rear axle all round.

Is there anything wrong with the set up I have at the moment. I'd
like to keep the car looking as it does now which is why I was trying
to identify the wheels it has currently.

Should I swap axle with what I have? Can I fit the same tyres on all
4 wheels despite the different rim sizes?

Would I be better looking for 2 more 5,5 or two more 6.0 wheels to
match? If need be I'll go for a set of 4 in a similar style, which
probably means Dolly sprint or similar?

Many Thanks,

Mark

mike whiskey wrote:


That's a strange combination. More that likely the rolling radius is the
same.

Its like going from a 165-14 to a 175.75 -14 the rolling radius is
similar because the profile is 75%. (The price difference for me is near
double to buy the 165-14.)



Most likely that's correct




I would have the wider wheels on the rear.

Its important that the geometry is correct for the steering/wheel
alignment. This includes the offset of the rim so the pivot point
matches the specific geometry Camber/caster/turning etc. for correct
alignment.


Cars like the Westfield use different size wheels front and rear (wider).


Triumph wheels - they need to be supported off the spigot in the centre
of the hub - the wheel nuts don't actually support or align the rim,
they are flat and don't have that taper into the rim. Not a good idea if
you don't use Triumph Dogamite hubs. (Triumph service bulletin notes)

Rob <mesa (AT) mine (DOT) com> wrote

....
rears are 6.9mm bigger than the fronts.

spare of each size, because it is illegal to drive with mismatched sizes on
the same axle (unless the car was supplied from new with a "spacesaver"
spare, which can be used at low speeds to get to the nearest place where the
puncture can be repaired).

Jim

Jim Warren wrote:

I was trying to work out why the difference and maybe the radius being
the same as to why they were fitted in the first instance.

the 1/2" difference in rim size isn't going to make any difference which
tyres you use as long as they are recommended for the 5.5 - 6.0 rims and
all the same.

mike whiskey (mark.williamson (AT) djinter (DOT) net) gurgled happily, sounding much
like they were saying :

On a RWD car, especially one with cart springs, I'd have the bigger tyres
on the back, I think. How's it driving at the moment? Fairly tail happy,
I'd assume?

205 will fit on 5.5" rims.

Adrian wrote:
Thanks for the comments so far.

How's she driving? no idea when it was last on the road!

Will avoid Dolly hubs, and keep searching for something appropriate.
MW

Rob <mesa (AT) mine (DOT) com> wrote

....
on full lock or on full bounce after driving over a pothole, and the 5.5s
then put on the offending axle to get round the problem? Have you tried
what they look like swapped round?

Alternatively, did the owner discover that there wasn't enough weight at the
back to get proper grip on the wider tyres and put some narrower ones (but
higher profile to keep the same rolling radius) on to stop it being tail
happy?

My PI is shod with 185s. The Gilbern is a lighter car, so 205s look a bit
excessive to me.

Jim