Offset Help

[pilotprice]

Hi
I have a 2010 sigma 150 de-dion car, standard track
I want 13 inch wheels and have found some, from a 7.
The seller has indicated they are 23mm positive offset
Can anyone confirm these are correct for my car?

[HustleRussell]

23mm is the figure I have in my head.

[Canuck7]

For some reason, I have 29mm offset in my head, (which seems rather out), lol - but it depends (some say) on metric or imperial chassis and what sort of rear axle you have.

24 mm comes up a lot - seems to be about the standard.
https://www.pistonheads.com/gassing/topic.asp?t=12...

Others state that 18 - 24 seems the safe range - depending on width of tires. One person says his rears at 195mm on a 20mm offset has only a 5mm gap between it and the radius arm. *shrug* Seems a bit odd. I don't know my offset but I'm running 220mm tires in back on a deDion.
https://www.pistonheads.com/gassing/topic.asp?t=10...

The superlight uses 6" wide front and 8.5" rears with an offset of ET 24. Seems people running wider tires (eg. 205+) run an ET20 or less, if they have a choice. https://www.pistonheads.com/gassing/topic.asp?t=11...

For 13" wider tires, 6" and 8" rims, seems ET23-ish up front and ET20 to ET14 in back.
Damdy-Cash posts;
"On my 1992 S3 DeDion I got Compomotive front CXR-1365 13x6,5 ET23, Rear CXR-1381 13x8 ET20.
Later I added 6 mm spacer to the rear (what gives finally ET14) what looks perfect in the arches and didn't touch anything. Tyres are CR500 175/55 and 205/55."
https://www.pistonheads.com/gassing/topic.asp?t=13...

That seems to cover most of what is up here for offsets.

[HustleRussell]

I put new brakes on mine today, forgot to look

Will have a look tomorrow