[Shotimes] Rear rotor size

[Dave]

10.9 inches for the rear rotor.
Dave

Jon Heese wrote:

> Jason,
>
> For what it's worth, my '95 GL came from the factory with 4-wheel 
> discs and I've seen a couple more in salvage yards with such.  So it 
> was offered as an option on SLOs.
>
> I appreciate the effort, but in my search for this number, I already 
> came across all of the same stuff you did. =)  I guess I'll just go 
> outside later and measure the circumference of the disc to get an 
> accurate diameter number.  If anyone's interested, I'll post it to the 
> list.
>
>  - Jon
>
> Hartberger, Jason M. AT3 wrote:
>
>> I can't quote you exactly (making me pretty much useless for the 
>> question
>> asked), but I do know that the only difference in SHOs was vented 
>> rear disks
>> (vice solid ones later) in the 89-91(92?). I think. I'm not actually 
>> sure
>> about the rears... I do know that the SLOs used drums in the back, so 
>> that's
>> a whole other ballpark. I just looked on AlldataDIY, and it gives a part
>> number of YF1Z2C026BA for the rear disks on a 94. Autozone lists the 
>> same
>> (different) part number for a rear rotor - 54025 - for both a 93 and 
>> a 94,
>> suggesting no change between those two years. AZ lists a part number 
>> of 5495
>> for a '90, and also a 92, meaning they changed from the vented to the 
>> solid
>> rotor in 93. still don't know the OD of these things, though, but you 
>> can go
>> to an AZ or AAP and ask for one with a ruler and measure it there... 
>> the 94
>> rotor has a min. thickness of .5", if it helps.
>>
>> There might have been some rear disked SLOs out there. I don't know 
>> of any,
>> but I'd assume it'd be the same disk as the SHO... commonality and 
>> all that.
>>
>> I doubt it helps a whole lot, but I hope it helps a little.
>>
>> Jason
>>
>>
>> -----Original Message-----
>> From: Jon Heese [mailto:shotimes@jonheese.com]
>> Sent: Monday, January 10, 2005 1:25 AM
>> To: shotimes@autox.team.net
>> Subject: [Shotimes] Rear rotor size
>>
>>
>> Out of curiosity, what's the diameter of the Gen2 factory rear 
>> rotors? I looked through my year or so of list archives and googled 
>> the crap out of it, but no one explicitly quotes a diameter 
>> measurement for the rotors.  I suppose I could go outside with a lug 
>> wrench and a measuring tape, but I reckon someone can throw this out 
>> off the top of their head.
>>
>> Also, I know the size of the front rotors changed a couple times 
>> throughout the years, but did the size of the rears ever change?  Are 
>> they the same rotors found on rear disc SLO's of the same vintage?
>>
>> TIA,
>> Jon Heese
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