spiny
Club Retro Rides Member
Wiki Admin
I am abivalent towards car electrics ...
Posts: 1,330
Club RR Member Number: 167
|
|
|
|
Hi all, I'm after a sanity check to make sure I haven't confused myself with reading too many different articles on this. I'd like to get some interesting wheels for my Midget, but the 4x4inch PCD means wheels with the right offset are thin on the ground, and i don't want minilite copies or 4 spoke revolutions etc. So I was thinking: If I get a 4.4inch to 4x100 adapter, I open up my search to tons more wheels. However, they obviously change the offset, so... The standard ET for stock Midget wheels is ET20, if I add a 1 inch adapter (approx 25mm) would I be correct in thinking I need ET-5 offset wheels to keep everything roughly in he same place (assuming same wheel width/tyre size and so on) ? With ET0 possibly working too, depending on clearance on the car I guess ? cheers  |
| |
|
|
|
|
|
|
|
|
|
Yes that's correct.Sorry, long night and I got the maths the wrong way round  |
| |
Last Edit: Jul 29, 2021 8:07:29 GMT by xbl
|
|
spiny
Club Retro Rides Member
Wiki Admin
I am abivalent towards car electrics ...
Posts: 1,330
Club RR Member Number: 167
|
|
|
|
cheers |
| |
|
|
Dez
Club Retro Rides Member
And I won't sit down. And I won't shut up. And most of all I will not grow up.
Posts: 11,714
Club RR Member Number: 34
|
|
|
|
|
No, it’s the other way round.
You’d need to start with a et 45 wheel to get et20 after you’ve added a 25mm adapter.
|
| |
|
|
adam73bgt
Club Retro Rides Member
Posts: 4,868
Club RR Member Number: 58
|
|
|
|
Dez just said what I was about to type haha, www.willtheyfit.com is a useful tool for visualising wheel width and offset changes also |
| |
|
|
|
|
|
|
|
|
yeah what dez said - it's the opposite to what a lot of people think. Also bear in mind while you're at it you might want to add a bit of width any way in terms of sitting the wheels closer to the edge of the arch.
4x100 with ET30-40 will give you loads of options including many OEM VW wheels.
Get the wheels first then get the adaptors made up so that you get the right centre bore for the wheels and also you can play about with templates to see what width adaptor will get the wheel where you want it.
|
| |
|
|
spiny
Club Retro Rides Member
Wiki Admin
I am abivalent towards car electrics ...
Posts: 1,330
Club RR Member Number: 167
|
|
|
|
again, cheers I wasn't sure which way round to 'add' the adapter width |
| |
|
|
|
|
|
Jul 29, 2021 10:02:21 GMT
|
As said assuming the new wheels are the same width as the old ones going with a 25mm spacer you need an ET45 wheel for it to be in the same place under the arch.
The WillTheyFit site linked above is very handy for then checking where it would sit if it was a wider wheel and what offset you would want to keep the inner edge of the wheel in the same place and the outside moving nearer to the arch. Or if you have room for a bit more on the inside towards the body but don't want it nearer the arch again this can show that.
I'm guessing your midget has narrow wheels and small tyres? If you go 1" wider on rims but keep the same ET you get 1/2" extra to the arch and 1/2" towards the suspension. The centre of the wheel stays in the same place and extra width is spread evenly to both sides.
So if you go 1" wider but want all the extra width to the outside to fill the arches more you need 1/2" less ET so from 20 to 8 (well 7.5 but 8 is close enough). Plus the 25 of your spacer puts you looking at ET33 wheels.
There are many options of ET for 4x100 wheels in various sizes and styles so i would get some info on a wheel you like the look of, then put those numbers into WillTheyFit comparing them to your current wheels (but subtracting 25mm from the new wheel ET) so you can see where that lines up the new wheel in relation to you arch and body/suspension to see if it will clear everything.
Hope that makes sense
|
| |
|
|
|
|
|
Jul 29, 2021 10:11:46 GMT
|
|
I'm sure 101.6mm to 100mm is well within range for a wobble bolt.
|
| |
|
|
spiny
Club Retro Rides Member
Wiki Admin
I am abivalent towards car electrics ...
Posts: 1,330
Club RR Member Number: 167
|
|
Jul 29, 2021 10:40:16 GMT
|
As said assuming the new wheels are the same width as the old ones going with a 25mm spacer you need an ET45 wheel for it to be in the same place under the arch.
The WillTheyFit site linked above is very handy for then checking where it would sit if it was a wider wheel and what offset you would want to keep the inner edge of the wheel in the same place and the outside moving nearer to the arch. Or if you have room for a bit more on the inside towards the body but don't want it nearer the arch again this can show that.
I'm guessing your midget has narrow wheels and small tyres? If you go 1" wider on rims but keep the same ET you get 1/2" extra to the arch and 1/2" towards the suspension. The centre of the wheel stays in the same place and extra width is spread evenly to both sides.
So if you go 1" wider but want all the extra width to the outside to fill the arches more you need 1/2" less ET so from 20 to 8 (well 7.5 but 8 is close enough). Plus the 25 of your spacer puts you looking at ET33 wheels.
There are many options of ET for 4x100 wheels in various sizes and styles so i would get some info on a wheel you like the look of, then put those numbers into WillTheyFit comparing them to your current wheels (but subtracting 25mm from the new wheel ET) so you can see where that lines up the new wheel in relation to you arch and body/suspension to see if it will clear everything.
Hope that makes sense
Cool info, thanks I know I'll need to do more checks, as my midget is the square arch, so there is less wriggle room at the rear. |
| |
|
|
spiny
Club Retro Rides Member
Wiki Admin
I am abivalent towards car electrics ...
Posts: 1,330
Club RR Member Number: 167
|
|
Jul 29, 2021 10:40:38 GMT
|
I'm sure 101.6mm to 100mm is well within range for a wobble bolt. Personally, I don't want to risk it |
| |
|
|
slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
|
|
Jul 29, 2021 13:27:24 GMT
|
|
There is no risk if the wheel is located on the spigot. I cant remeber if the midgets have spigots tho tbh!
|
| |
|
|
|
|
|
Jul 29, 2021 14:10:37 GMT
|
|
|
| |
|
|
|
|
|
Jul 29, 2021 16:07:56 GMT
|
I'm sure 101.6mm to 100mm is well within range for a wobble bolt. Personally, I don't want to risk it there is no risk, just an eccentric washer, make sure its on the spigot and away you go. no different to a tapered wheel on any other vehicle. |
| |
|
|
