Work Wheels.. Disk sizing ? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Juvenile · 12-25-2013, 03:05 AM

About to order wheels and have been asked to select disk size,choices are A Disk or O Disk...

I'm still not sure "exactly" what it means.. Googled a shit load of threads about it but they all end up going off topic so no one gets a straight answer

From what I can gather so far is, O less concave and more lip and vice versa..

PradiG · 12-25-2013, 03:15 AM

Quote:

Originally Posted by Juvenile

About to order wheels and have been asked to select disk size,choices are A Disk or O Disk...

I'm still not sure "exactly" what it means.. Googled a shit load of threads about it but they all end up going off topic so no one gets a straight answer

From what I can gather so far is, O less concave and more lip and vice versa..

O-disk is considered "deep dish". You will get more of a lip, but you sacrifice space (brake clearance) for a big brake kit.

A-disk is standard sizing. Normal sized lip / brake clearance

Hope that helps

Juvenile · 12-25-2013, 03:23 AM

Cool, thanks.

I'll be keeping standard brake set up hoping O is fine for it. Just got word from my supplier that Work Japan will contact him to find out what they recommend on a 86 and what they've already fitted. Hopefully find out soon.. Thanks again

PradiG · 12-25-2013, 03:24 AM

Quote:

Originally Posted by Juvenile

Cool, thanks.

I'll be keeping standard brake set up hoping O is fine for it. Just got word from my supplier that Work Japan will contact him to find out what they recommend on a 86 and what they've already fitted. Hopefully find out soon.. Thanks again

No problem. If you stick with stock brakes. O-disk is fine, I run O-disk lol

mav1178 · 12-25-2013, 04:24 AM

What wheels?

-alex

Redstar · 12-26-2013, 02:32 PM

Some wheels have different disk types, for brake clearance. Not all wheels have good brake clearance, so they need thicker back pads to add space. This of course changes the offset.

So for instance, you may notice on Work Wheels USA's website that they have certain wheels that have similar specs but the lip sizing is different. This is due to the change in back pad thickness. One easy way to see the difference in thickness would be to compare the same diameter, width, and lip size.

You'll notice that 19x10.5 +45 (A-disk or regular), 19x10.5 +55 (O-disk or low-disk), and 19x10.5 +28 (R-disk or high-disk) all have 72mm lips. The back pad has 10mm more metal shaved off for the O-disk version compared to the A-disk version, and the R-disk has 17mm material added in comparison to the A-disk version. If you have the clearance, O-disk allows you to simply run bigger lip sizes, by compensating for the difference in backpad thickness (bigger lip = smaller inner barrel for the same width wheels).

SlammedSilly · 05-11-2016, 04:09 PM

SOOOOOOOOOOOOOO............

im gonna bring this thread back, so from what ive gather, running "O-disk" on our car is completely fine as long as you dont go with a big brake kit??

"A-disk" is fitted like a regular wheel with no deepdish lips?

so if i run "O-disk" say dimensions of the wheels are 18x9.5 et39 i will be fine??

Kami Speed · 05-11-2016, 05:02 PM

Quote:

Originally Posted by SlammedSilly

SOOOOOOOOOOOOOO............

im gonna bring this thread back, so from what ive gather, running "O-disk" on our car is completely fine as long as you dont go with a big brake kit??

"A-disk" is fitted like a regular wheel with no deepdish lips?

so if i run "O-disk" say dimensions of the wheels are 18x9.5 et39 i will be fine??

O-Disk fits the stock brakes. A-disk has less of a lip that O-Disk in a comparable size. But that doesnt mean it wont have a lip to it.

And yes, that should fit with coilovers but will be very close to your stock suspension.

SlammedSilly · 05-11-2016, 05:40 PM

Quote:

Originally Posted by Kami Speed

O-Disk fits the stock brakes. A-disk has less of a lip that O-Disk in a comparable size. But that doesnt mean it wont have a lip to it.

And yes, that should fit with coilovers but will be very close to your stock suspension.

pm'd^

12-25-2013, 03:05 AM	#1
Juvenile Senior Member Join Date: Jan 2013 Drives: 86 GTS Location: Sydney AUS Posts: 853 Thanks: 1,111 Thanked 1,430 Times in 417 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Work Wheels.. Disk sizing ? About to order wheels and have been asked to select disk size,choices are A Disk or O Disk... I'm still not sure "exactly" what it means.. Googled a shit load of threads about it but they all end up going off topic so no one gets a straight answer From what I can gather so far is, O less concave and more lip and vice versa..

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12-25-2013, 03:23 AM	#3
Juvenile Senior Member Join Date: Jan 2013 Drives: 86 GTS Location: Sydney AUS Posts: 853 Thanks: 1,111 Thanked 1,430 Times in 417 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Cool, thanks. I'll be keeping standard brake set up hoping O is fine for it. Just got word from my supplier that Work Japan will contact him to find out what they recommend on a 86 and what they've already fitted. Hopefully find out soon.. Thanks again

12-25-2013, 04:24 AM	#5
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,099 Times in 3,030 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	What wheels? -alex

12-26-2013, 02:32 PM	#6
Redstar Destroyer of Tires Join Date: Apr 2013 Drives: 2001 Honda Accord, 1997 Lexus ES300 Location: SoCal Posts: 88 Thanks: 39 Thanked 50 Times in 30 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Some wheels have different disk types, for brake clearance. Not all wheels have good brake clearance, so they need thicker back pads to add space. This of course changes the offset. So for instance, you may notice on Work Wheels USA's website that they have certain wheels that have similar specs but the lip sizing is different. This is due to the change in back pad thickness. One easy way to see the difference in thickness would be to compare the same diameter, width, and lip size. You'll notice that 19x10.5 +45 (A-disk or regular), 19x10.5 +55 (O-disk or low-disk), and 19x10.5 +28 (R-disk or high-disk) all have 72mm lips. The back pad has 10mm more metal shaved off for the O-disk version compared to the A-disk version, and the R-disk has 17mm material added in comparison to the A-disk version. If you have the clearance, O-disk allows you to simply run bigger lip sizes, by compensating for the difference in backpad thickness (bigger lip = smaller inner barrel for the same width wheels).

05-11-2016, 04:09 PM	#7
SlammedSilly Senior Member Join Date: Jul 2015 Drives: 2015 Ultramarine FR-S Location: Philadelphia, PA Posts: 382 Thanks: 550 Thanked 51 Times in 46 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	SOOOOOOOOOOOOOO............ im gonna bring this thread back, so from what ive gather, running "O-disk" on our car is completely fine as long as you dont go with a big brake kit?? "A-disk" is fitted like a regular wheel with no deepdish lips? so if i run "O-disk" say dimensions of the wheels are 18x9.5 et39 i will be fine??

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