Front strut caliper spacing

[Harpo]

Sorry, I know this has been covered before

What year did caliper spacing change from 3.0 to 3.5in?

Thanks

David

[mepstein]

:-)

[Flat6pac]

The early S brakes on 69/70 were already on 3.5 spacing. If you ordered Koni struts and shocks you automatically got aluminum calipers.
That’s part of the answer...
Bruce

[Harpo]

What spacing would a 74 have?

Thanks

David

[Bill Verburg]

Originally Posted by Harpo

What spacing would a 74 have?

Thanks

David

Most would have had 3" M calipers all around
Only Carrera would have 3.5" as a base front

[bkreigsr]

In case anyone is using this thread for reference, my 76 912E (Euro ordered, Euro delivery) came with 3.5" spacing with steel calipers over non-vented rotors.
I think only the later production numbers (2000-2099) came with these struts.

Bill K

[Bill Verburg]

Originally Posted by bkreigsr

In case anyone is using this thread for reference, my 76 912E (Euro ordered, Euro delivery) came with 3.5" spacing with steel calipers over non-vented rotors.
I think only the later production numbers (2000-2099) came with these struts.

Bill K

The op asked about MY74 911

MY75 was the same as '74

MY76 saw the introduction of the 3.5" mount A caliper on all models except the 930 which retained the S until MY78

I'm surprised that 914 got the A's in '76 too