wheel off set (et)
- Thread starter foosh944
- Start date
Chrishazle
Active member
Have a play on here : http://www.rimsntires.com/specs.jsp - once you know the existing rim/ET/tyre size you can see the effect of different rims etc.
Firstly, 18" are not recommended for 944 or 968s. It will destroy the ride quality and if you even go to 17" you need to have the 968 rear wishbone mounts, more so for 18s
As Chris says the calculator is a good place to start, but I would guess the fronts would be a very tight fit and 10" on the back with an offset of around 60 may fit but I dont think Ive seen 10s on the back.
Tyre choice may make the difference, between fitting and not as what you're looking at is pretty extreme. They are not undertyred to start with.
As Chris says the calculator is a good place to start, but I would guess the fronts would be a very tight fit and 10" on the back with an offset of around 60 may fit but I dont think Ive seen 10s on the back.
Tyre choice may make the difference, between fitting and not as what you're looking at is pretty extreme. They are not undertyred to start with.
944 man
Active member
52.3mm for a standard 7" rim. For each inch of width that increase you add 12.7mm to the offset required ie. 8" ET65. This keeps the centre of the wheel where the manufacturer intended and preserves the steering characteristics.
Rears arent sensitive to offset, you just have to ensure that they fit, so with an 8" rim fitted, measure the inner and outer rim clearance.
An 8" ET45 from will need a spacer, but youll have to work out the rears yourself, based on the wheel width/offset currently fitted. I will guess that only the ET55 wheel has any chance though.
Rears arent sensitive to offset, you just have to ensure that they fit, so with an 8" rim fitted, measure the inner and outer rim clearance.
An 8" ET45 from will need a spacer, but youll have to work out the rears yourself, based on the wheel width/offset currently fitted. I will guess that only the ET55 wheel has any chance though.
Chrishazle
Active member
The first 968 cab I drove was on 18" rims, 225's on the front and 255's on the rear (don't remember the profile, guessing 40ish). Steering was heavy, ride was very firm, scuttle shake very noticable, roadholding was excellent but not that much better than my 968 coupe on 16's! Had I bought that car I would have immediately replaced the (non Porsche) 18's with smaller rims. An aquaintance on porsche968uk has tried 16's, 17's and 18's on his 968 cab and IIRC recommends 16's for ride quality with adequate roadholding or 17's if you're prepared to sacrifice a little ride quality for more precice handling. Talking normal road use here, not track tool setup.
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