Rostyle wheels martin Robey

[Mr.Mini]

Hi Chaps ,

Just saw some new aluminium wheels - rostyle type - on the Martin Robey homepage .

I currently have an original 6,5 inch set for mine , waiting to be restored , but I was wondering how the new ones would look on an Interceptor .
The new ones are 7 inch wide ,( 8 inch optional ) , with a 6 mm offset .

Link : https://www.martinrobey.com/part/15532

Anybody on here who has bought a set already and fitted them to a car ?
Any pictures of them fitted to a car ?

Regs Harald

[VFK44]

Very impressive. At less than £200 each with a "privilege card" I can see these becoming very popular with those with rusty wheels. It was a pity they have machined the spokes flat, instead of the subtle curvature of the originals that makes a big difference to how the spokes reflect light.
Do you think they can be further polished to give something similar to that chrome glitter?

[RichardGibson]

Hi .
My Mk2 Interceptor was fitted with Mk3 wheels when I acquired it.
Then earlier this year I saw the Rostyles on Martin Robey's web site and bought a set as price was great.
Have had them for a while as the car was away for some work and has just come back.
Arranged to swap the tyres from my existing wheels as they were only 3 years old and had only done about 2000 miles.
Swapped the first tyre and went to fit the new wheel to the car and lo! the wheel nuts were too big. Had to contact Robey's for a compatible set as they are different to the mk3 wheel nuts.
Also you need to buy the wheel centre caps too.
Now just waiting for my nuts.
Still a worth while buy to get the looks back though.
Richard

[Blue-SP]

Glad that the new U.S Muscle wheels are gaining appreciation in the JOC. The wheel is called a Magnum 500A and originally made and produced for the Ford Mustang which has a different bolt pattern. As we had interest from the Rover community and as I had recently purchased an SP I worked with our wheel factory to make modifications to offer a 5-5”(5-127mm) and also a 5-4.75” for Jaguar and Chevrolet.The wheel is designed to be used with a 7/16” standard chrome bulge nut with a 19mm hex. The caps are sold separately simply because there are over 15 wheel centre options. The wheel is a 15x7 rim so has a slightly larger lip on the rim which helps give a wider stance but also fills the wheel arch. By using a wider wheel it does allow fitting of a 235/60 x15 tyre. We also have a 15x8 wheel for those wanting a wider stance for the rear.

Craig at Robey’s does a super job promoting the wheels and as Jensen parts manufacturer was well placed as a selling agent. We do have other dealers Jensen Service, Riverbourne and Appleyards so you can choose your favourite. We will not undercut our dealers but you can look up the wheel specs and offsets and cap choices on our website www.northhantstyres.com

As specialist Antique and Classic tyre & wheel Specialists we can offer all tyre options including the pin stripe whitewall or the redline if you have a US spec car.

We did try to produce a chrome steel reproduction and even Grant gave me a wheel center to send to our steel wheel supplier but it was not possible to pass the pressure test so had to give up, an alloy is lighter and much stronger

[VFK44]

I believe that Magnum were the original manufacturers of this design, but when Rubery Owen started making their version in the UK they got renamed Rostyles!

[Mr.Mini]

Blue SP and Richard Gibson ,

Thank you for your replies !

Any chance of a picture of the wheels fitted to an Interceptor ?

regs Harald

[KaranMK2]

I have them on a Mk1 but I can’t really get a good photo as the car is on Jacks. Perhaps later.

[Blue-SP]

Here are a few photos from an Interceptor at Jensen Service with an O/E Dunlop SPSport tyre. Steve was part way through a complete restoration. Maybe it is your car?

The other is from a tyre and wheel package going out to a Rover P5 owner.

[Roh]

The offset is way out.

[VFK44]

Offset ET -6 (mm) Backspace 4.25 (") - from northhantstyres website.

[Blue-SP]

Vehicles in the past always had more than enough space in the wheel arch. Today it allows a wider wheel to fit without any need for body mods. JIA use a 17” wheel and I have a 17” version on my SP It allows a 235 section width tyre, sizes that were not around in the early 70’s. The original steel wheel was a probably scavenged from Rover, as we all know several parts on our cars were purposed from other manufacturers

[Grant]

The offset is way out.

Rohan, I am confused by this, what do you actually mean please?..Way out from what? Is offset a bad thing then?..Or, are you meaning they are not the same offset as the originals?..I think the point is to make the car sit wider..but maybe you are meaning something else?..Please elaborate as I am interested

[Roh]

Mk1 Rostyle 35mm
Mk2 Rostyle 35 mm
GKN 32 mm

So you are looking at around 30mm difference per wheel and a track change of 60mm. That's a massive change in track and would be illegal in Australia as the maximum allowable track change is 25 mm. It's also going to change a whole bunch of things to do with the suspension geometry. The scrub radius is going to change and odds on it will end up tramlining.

[Grant]

Mk1 Rostyle 35mm
Mk2 Rostyle 35 mm
GKN 32 mm

So you are looking at around 30mm difference per wheel and a track change of 60mm. That's a massive change in track and would be illegal in Australia as the maximum allowable track change is 25 mm. It's also going to change a whole bunch of things to do with the suspension geometry. The scrub radius is going to change and odds on it will end up tramlining.

I did change the offset on my Mk2 Rostyles by adding a 25mm Band to the outside of the rim, that is about the limit for the rears as there is only a fag paper between the tyre and arch, I then done the same on the fronts and it looks so much better, I can't seem to notice anything different in the handling apart from it being better and firmer on the road. By adding this 25mm to the outside rim what difference to the steering/suspension geometry would have occurred please Rohan?Neg Camber?
I have since done another set and added 25mm to the outside edge and the inside Edge,..Therefore does that mean the ET would now be the same as previously on the standard wheel and so therefor no changes to the steering/suspension geometry then Rohan?
Here's a pic of the ones with the 25mm added to both inner and outer rim >>
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>>>
Many thanks in advance for your comments/thoughts Rohan

[Roh]

Adding 1" to the outside of the rim will change the offset by 1/2".
Adding 1" to both the inside and outside keeps the original offset.


The scrub radius is affected. This makes steering harder and increases the load on the steering system.
The track is widened. This reduces weight transfer.
Camber isn't affected.
Wheel bearing loads when travelling in a straight line will be increased.