Created by: | Orig. Posting Date | User Name | Edit Date |
| May 26, 2024 10:28PM | TK | |
| Apr 13, 2024 06:05PM | JohninCM | |
| Apr 13, 2024 02:26PM | PNWxPlantDE | |
| Apr 13, 2024 10:16AM | JohninCM | |
| Apr 12, 2024 07:50AM | PNWxPlantDE | |
| Apr 12, 2024 06:43AM | scooperman | Edited: Apr 12, 2024 06:50AM |
| Apr 11, 2024 04:24PM | PNWxPlantDE |
Posted:
May 26, 2024
10:28PM
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Total posts: 1127
Last post: Sep 3, 2024 Member since:May 13, 2002
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Think about it. The calliper is the part that will hit your wheels, not the disc.
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Total posts: 1852
Last post: Feb 5, 2025 Member since:Feb 24, 2002
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OK, first up my 7.9in disk knowledge is limited. My understanding is the 7.9in kits include an aftermarket low profile caliper to accommodate fitment of 10in wheels. The 8.4in calipers are a factory size and designed to fit 12in and 13in wheels. The factory 8.4in calipers will not fit a 10in wheel. So identifying your calipers is the first priority, post some photos so they can be identified (although if the are marked with 8.4 that is probably what they are).
Also I believe the 7.9in kits use 8.4in drive flanges. Does your Mini currently have front disk brakes? If it does, do you know what size they are? If you are converting from drum brakes do you have all of the other required parts ... steering knuckles, axels and so on?
As you have found out 10in wheels that fit over the 7.9in disk brakes are limited. Have you considered running the factory 7.5in disk brake package? Most 10in wheels are going to fit the 7.5in set up.
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Total posts: 5
Last post: Apr 13, 2024 Member since:Jun 28, 2021
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I had planned on running one of the 7.9in kits under my 10in wheels, but the calipers are stamped "8.4" instead of "7.9". I don't intend on running 8.4 calipers, but I'm also not sure if there is a true difference between 8.4 and 7.9 calipers since the 7.9 rotor is essentially a turned-down 8.4. I reached out to a couple companies in the old country and they replied with a list of a couple wheels that would/should fit the straight 7.9 combo.
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Total posts: 1852
Last post: Feb 5, 2025 Member since:Feb 24, 2002
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Are you planning on running 10in wheels? I doubt the 8.4 calipers will work with 10in wheels.
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Total posts: 5
Last post: Apr 13, 2024 Member since:Jun 28, 2021
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Thanks for the info.
Edited:
Apr 12, 2024
06:50AM
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Total posts: 1578
Last post: Feb 17, 2025 Member since:Mar 10, 1999
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companies that sell big brake kits usually offer a brake template so that you can confirm clearance with your wheels before buying anything. Example here:
https://www.minimania.com/images/articles/Big_Brake_Wheels/Stoptech_Clearance_Template.pdf
and here:
https://www.7ent.com/pages/articles-tech-tips/kad-caliper-info-which-calipers-do-i-need.html
On the UK forums I see people claiming they have 8.4" calipers on 7.9" rotors, most of them say they had to add wheel spacers.
https://www.minimania.com/images/articles/Big_Brake_Wheels/Stoptech_Clearance_Template.pdf
and here:
https://www.7ent.com/pages/articles-tech-tips/kad-caliper-info-which-calipers-do-i-need.html
On the UK forums I see people claiming they have 8.4" calipers on 7.9" rotors, most of them say they had to add wheel spacers.
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Total posts: 5
Last post: Apr 13, 2024 Member since:Jun 28, 2021
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MK1 Cooper S question.
I tried searching and looked through the first 5 pages of the forums, but here I am.
Does anyone out there know if an 8.4 caliper will fit/work on a 7.9 rotor? I ordered the rotors and calipers as a kit a while ago and am getting around to finally assembling and installing everything. I noticed during my pre-task inventory that the calipers are stamped with a big "8.4" on them along with the label on the box stating "8.4".
66 Cooper S
LHD
I tried searching and looked through the first 5 pages of the forums, but here I am.
Does anyone out there know if an 8.4 caliper will fit/work on a 7.9 rotor? I ordered the rotors and calipers as a kit a while ago and am getting around to finally assembling and installing everything. I noticed during my pre-task inventory that the calipers are stamped with a big "8.4" on them along with the label on the box stating "8.4".
66 Cooper S
LHD
