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Wheels and tyres

Posted: 20 Jul 2009 16:19
by alanjarvis
I got some MG-F 15" alloys off e-bay (I think they are the standard MG alloys). I have a couple of questions. Firstly I presume I can use the same bolts I use with the original TR7 alloys I currently have on the car. Secondly which tyres would be best? One pair of the alloys have 185/55 R15 tyres on them the other pair have 205/50 R15 on them. Really I would like to keep the 185/55 as they have the most tread.

Thanks in anticipation!

Posted: 20 Jul 2009 17:11
by diver
Why not get a new set of 195/55/15 for the back?
Diver

Posted: 20 Jul 2009 17:44
by mak
Hi,

You need chamfered bolts - rally design or demon tweeks are a good source.

Posted: 20 Jul 2009 17:53
by Howard722
And not forgetting that you need to match(or get close), to the original 185/13/HR70`s rolling dia./circumference to ensure your speedo reads correctly! -to avoid[B)]--[;)]

Enjoy& regards Image

Posted: 20 Jul 2009 20:25
by PeterTR7V8
I used my MGF rims for the first time this weekend with 205/50/R15 race tyres & I can tell you that you will need spacers on each wheel. The offset on the MGF rim is 5mm less than your standard rims so you need a 5mm spacer. On the back there is no tyre rub but the tube that protrubes from the hub is a very tight fit in the centre hole on the MGF rim & may not let the rim sit true without the spacer. Because I only had the 2 spaces & they were needed on the front I put the rims on without them & even though one side was a very tight fit & had to be pushed up against the hub with the nuts it did fit. It took a bit of effort to get the wheel off though.

On the front I have non-standard struts with much narrower springs & without a spacer the 205s on the MGF rim the tyres were jammed up against the base of the locking ring of the adjustable spring base so hard the wheel wouldn't turn. With a 5mm spacer I got occaisional light rubbing in corner & braking which I decided was Ok for the day but I need to go to a bigger spacer for the front. I need to check what the studs will allow but I really need to use a 10mm spacer. I've had issues before eve with the Superlites with some tyre brands hitting these struts depending on the profile of the tyre wall. Factory struts may better or worse with 205/50s but I doubt you will have an issue with 185s.

The nuts I had on my usual Superlites had tapered seats but didn't work on the MGF rims. They were too narrow & chewed the holes up. I bought some bog standard tapers which had a wider seat than my other nuts & they worked fine.

Image
Never say die. At least not while you're still breathing.

Posted: 20 Jul 2009 20:47
by ngtf
On Dad's car he runs MGF alloys using the standard 185's on the front and 205's on the rear. Seems to work really well. The beauty of the 205's on the rear is that they fill the arches so well. The front seem to fit over the Capri calipers well.

Gavin

Eeyore rides again !!
Image
EOR14W - Persian Aqua 2L Dhc, Now rebuilt and looking lovely - Sprint engine now fitted!

Posted: 20 Jul 2009 20:54
by Chubster
Mgf 16 inch rims fit fine, I agree with the spacers though although mine fit without.[8D][8]

Image

Posted: 21 Jul 2009 17:52
by HowardB
I have early style 6 spoke MGF wheels on mine 185 front and 205 rear which give a much better ride than the standard steel rims. They needed the centre opening out very slightly to fit the hub, but are fitted without any spacers after discussion with Robsport.

From trial and error plus a lot of searching on the Internet found that the front tyres need to be run at a lower pressure than the rears - I use 24 front & 30 psi rear. This gave me a neutral handling - slight understeer when you lift off and slight oversteer when you accelerate through a bend. (Car is fitted with standard springs & poly bushes)

One point about some of the MFG wheels is that you will need to be creative in fixing the front central caps in place as you have to cut the clips off.

Enjoy

Posted: 21 Jul 2009 18:40
by alanjarvis
Ok, thanks Howard and everyone, so what method would you recommend for 'opening out the centres'?

Posted: 21 Jul 2009 19:57
by Maxwell
Five-Spoke 15" MGF Speedline, with 12mm alloy spacers.
Tyres? 205\50

Maxwell [:)]