# Z31 rear rotors

**URL:** <https://forums.speedlife.net/t/z31-rear-rotors/138072>\
**Category:** Canada Nissan Automotive\
**Created:** [November 17, 2004, 1:15pm UTC](https://forums.speedlife.net/t/z31-rear-rotors/138072 "2004-11-17T13:15:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Nis240](https://avatars.discourse-cdn.com/v4/letter/n/a9a28c/32.png) [@Nis240](https://forums.speedlife.net/u/Nis240)\
**Post date:** [November 17, 2004, 1:15pm UTC](https://forums.speedlife.net/t/z31-rear-rotors/138072/1 "2004-11-17T13:15:09Z")

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i know they are solid 84-86 and vented from 87-89. Are there certain models which came with slightly bigger diameter rotors in the back? The book talks about an SF model??? Did the sf model come with bigger brakes??

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**Author:** ![Jason\_Lange](https://avatars.discourse-cdn.com/v4/letter/j/65b543/32.png) [@Jason\_Lange](https://forums.speedlife.net/u/Jason_Lange)\
**Post date:** [December 5, 2004, 5:37pm UTC](https://forums.speedlife.net/t/z31-rear-rotors/138072/2 "2004-12-05T17:37:52Z")

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sf is the basic model w/out options. The vented 87-89 rotors are 11.8". Work great for me.