Transaxle Offset change from 45mm to 30mm

[75TS]

Hi All,

I have asked a fair few in the know and nobody can tell me why alfa 75 2.5 (and the GTV6) were a 45mm offset and then when the 3 litre & twin spark came out it was changed to 30mm.

Would love to know what (if anything) changed with the front suspension or geometry?

I'm about to have some 3 piece wheels made up for my 2.5 75 and it would be a good thing to know the difference.

Any help would be greatly appreciated.

[105gta]

Having a guess I'd say tire technology, perhaps check the wheel alignment specs as well...
A slight variation in static camber and wheel width with a different/newer tire, even brand of tire could dictate a difference in offset.
For the record the basic suspension geometry is the same for all models

[GTV6SA]

Calipers were different compared to earlier 2 litre versions

[LaStregaNera]

They changed the offset to fill the wheel arch flares better.
Twinspark and 3l 75 had flares stock, early 2.5 75 didn't

[Duk]

Having a guess I'd say tire technology, perhaps check the wheel alignment specs as well...
A slight variation in static camber and wheel width with a different/newer tire, even brand of tire could dictate a difference in offset.
For the record the basic suspension geometry is the same for all models

Tyre

[105gta]

😂😂 thanks Duk!

[75TS]

Thanks to everyone for their responses. I believe the front calipers for the GTV6 and later 75's were the same. The wheel arch spats on the later 75's makes a lot of sense. Next step is to look at the caster and camber differences as suggested.