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View Full Version : 11.65” IRS Brake Rotor Issue



SteveWorth
06-02-2023, 05:34 PM
Assembled one side of my 289 IRS this morning and when I came to install the brake rotor it will not fit over the hub.
I measured the hub external diameter and it is 5.74” but the inside diameter of the brake rotor is only 5.61”.
Both rotors measure the same, came in the 11.65” brake kit from FF5 and the hubs were new stock Ford Racing parts.
Has anyone else had this issue?
Any ideas?
Thanks,
Steve
185314

SteveWorth
06-02-2023, 08:22 PM
Well I assumed that the smaller discs went on the back...
Problem solved.
We all know what happens when we assume!

CraigS
06-03-2023, 07:20 AM
Yep after I did the IRS retrofit on my MkII a couple people asked, what is with bigger brakes on the rear?