wheels and tyres

[sb]

would someone please expalin in detail the measurments off wheels and tyes. I've tried researching but its all numbers to me! I understand the theory, that bigger wheels can't complete their turn as they foul the inner or outer body/machanics.

i'm considering alloys, various make/styles on e-bay, old school nice!
i'm assuming a wider wheel would create a lower stable ride.
however, offset, insets, ride hight, pct., nut size,etc. tyres, the hight of rubber from the rim to the road??

Marina disc in the furture.

does any one have a list of wheel from other companies, ie trumph, rover,rover etc,
cheers, sb

[Cam]

Well...........

i'm assuming a wider wheel would create a lower stable ride.

The width of the wheel has no bearing on the ride height. As for stablility there are other factors involved as well as width.

however, offset, insets, ride hight, pct., nut size,etc. tyres, the hight of rubber from the rim to the road??

Offset is how far the wheel sticks out from the car in relation to the wheel centre which bolts onto the hub.

Ride height is the height of the car from the ground and is determined by suspension setting as well as wheel/tyre combination.

PCD is Pitch Circle Diameter and is the diameter of a circle drawn through your wheel studs or in the case of a 4 stud wheel (like the Minor) the distance from the centre of one wheel stud to the centre of the stud diagonally opposite (4" in the Minor's case).

If you are going for Marina discs are you going to use the Marina hubs or the Minor ones? as this choice will determine which wheels you can use.

Tyres: 185/60 14 for example.

185 is the width of the tyre section in millimetres, 14 is the diameter of the wheel rim in inches and 60 is the height of the tyre wall (between the rim and the tread) expressed as a percentage of the tyre width so a 185/60 means that the tyre wall is 111mm tall.

[Kevin]

With the standard hub having a 4" p.c.d (pitch circle diameter) thats the width centre to centre of each stud, there are only a few rims that will fit, Midget, Riley 1.5,Wolseley1500, Austin a40, there are some alloya made in the sorrect pcd these are of the minilite lookalike type, if you wish to change the stud pattern you can get the disc brake kits for the front in a variety od patterns but for the rear an axle change will be required, Marina, mk 1 or mk2 Escort for instance and these can be fitted with different studs. Some people will tell you the Vauxhall Viva wheels fit but the studs are of a diffent size so its not advisable and others will tell you the modern 100mm pcd fits, it doesnt.
If you can be more specific in what you want to achieve we can advice further, also what sort of budget have you got.

[sb]

thanks for the replies.

Budget is always a problem although alloys could be considered a luxury.
A straight swap would be better, cheaper and period looking, if not truely original. although difficult to find.

I'm thinking a wider wheel/tyre will improve grip especially at the rear.

I'm working on the 1275 to go in and therefore a brake up grade/shocks/antiroll bar would seem important, but bit by bit and over time.

as Cam pointed out the marina disc could change the hubs and therefore i beleave modern wheels could be used, am i right here. what are pro/cons of marina hubs? Following cam's info am i right in thinking, hubs allowing, that to achieve standard minor ride hight any wheel tyre combination could be used, especially if modern wheels with holes drilled to fit are used.

this bit will make the purists grind their teeth. I like modern black four spoke revolution alloys, and various old school rostyles, aluminium/steel color. Wolfrace slot mags.

If i can get cool looking old alloys to straight fit, good, if not about £200 budget.

Cheers, sb

[Cam]

as Cam pointed out the marina disc could change the hubs and therefore i beleave modern wheels could be used, am i right here.

Marina PCD is imperial (4 1/2" I think) so no you can't use modern wheels generally as they are metric and don't fit correctly.

Following cam's info am i right in thinking, hubs allowing, that to achieve standard minor ride hight any wheel tyre combination could be used, especially if modern wheels with holes drilled to fit are used.

185/60 14 give roughly the same ride height and rolling radius as the standard Moggy wheels/tyres. So does 175/65 14. Wheels CANNOT be drilled to fit the holes would need to be filled and drilled again, not a normal or recommended practice in terms of safety, plus the design of most wheels is centred around the wheel holes, so if you change them it might look odd.

this bit will make the purists grind their teeth. I like modern black four spoke revolution alloys, and various old school rostyles, aluminium/steel color. Wolfrace slot mags.

Well if you like those style wheels then you should have an easier time! Those wheels are quite old-fashioned and are usually inperial anyway not metric, so they should fit your hubs.

And £200 should sort you out for the wheels if not the tyres! But you never know!

[sb]

what is the max width wheel and/or inset that a standard mog can take?
are marina hubs deeper and wider and therefore the above question again please?

cheers, sb

[Cam]

what is the max width wheel and/or inset that a standard mog can take?

All depends on the offset of the wheel you are trying to fit.

are marina hubs deeper and wider and therefore the above question again please?

Again depends largely on the wheels you are trying to fit. Not sure if they stick out further than the Minor hub though. Maybe someone can help?

[sb]

185/60 14 give roughly the same ride height and rolling radius as the standard Moggy wheels/tyres.

what are standard minor wheels and tyres on 64 models?

sb

[Cam]

Well, they are imperial 5.00 or 5.20 crossplies on a 14" wheel.

But the modern radial equivalent is a 145 14" in a standard profile which is either 80 or 82 depending on who you talk to!

[MilitantGraham]

Imperial sized tyres are measured across the tread contact area.
Metric sized tyres are measured across their widest part, about half way up the sidewall.
That's why a 5.00-14 tyre is the same width as a 145R14 (5.00" = 127mm)

[d_harris]

there are some quality vehicles there graham!

[Cam]

Graham, I have 5.20 crossplies on my '52 and they are narrower than the 145 radials on my Trav. 5.20" = 132mm so that's probably about right.

The definition of the section width is:

This is the width in mm of the tyre from sidewall to sidewall when it's unstressed and you're looking at it head on (or top-down). This is known as the section width.

So like you say, this would account for the difference in the measurements of Imperial and Metric tyres.

[SR]

SB, try to get hold off "kevmaxwell" on this board he sold me these cobras, and even had another set a few months back ,they bolt straight on with 185s, no clearance problems due to right offset,better pics on website,steve

[Kevin]

Looks a fair amount of room in your garage Steve, with room to work in.

[Alec]

Hello Sb,
be careful about using a different offset, not really a problem at the rear, but it will affect the steering geometry. I don't think it was clearly explained earlier; if the centre line of the wheel from top to bottom is in line with the face of the wheel where it bolts to the hub, (it rarely is), that is neutral. If the hub face is closer to the outer rim, that is inset and vice versa is offset. The steering is designed so the steering axis passes through or at least very close to the centre of the tyre. Fitting a different set will tend to cause steering problems as the extra leverage on the wheel (going through puddles even) will tend to steer the car despite what the driver does to the wheel. (It also increases load on the wheel bearings.)
I, personally, am not a great believer in wide tyres as the grip from relatively modest widths give very good grip. My wife's traveller (1275 modified) is on van wheels and 155\80\14's and my modified 2.5PI Triumph is only on 185\13's (I wanted 175 but couldn't get them easily). We live and drive on twisty rural roads and believe me we don't hang about.

Alec

[SR]

hiya kevin , yes mate gotta keep my babys out of the elements