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Thread: Rear vented brake disc: SWB vs LWB

  1. 09-12-2020, 04:38 PM #1
    blue72s
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    Rear vented brake disc: SWB vs LWB

    Just trying to understand what were the differences between the SWB and LWB rear vented brake discs.

    SWB
    286mm diameter as per sporting regulations x 20mm thick?
    901.352.041.15 early
    901.352.041.16 later (price @ Pelican $258.50 Sebro coated)

    LWB
    290mm diameter x 20mm thick?
    901.352.041.14 (price @ Pelican $71.50 Sebro coated)

    Is it true that the SWB brake shoes are wider than the LWB version?
    According to PET, the SWB shoes are not listed except for the lining pad for adhere, whereas the LWB shoes are available.

    Are the discs interchangeable between SWB and LWB, i.e. can SWB rotors be used on a LWB 911? Is the offset the same?

    Lastly, why are SWB discs much more expensive? (Does it come with shoes included?)


    Thanks in advance.
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  2. 09-13-2020, 05:48 AM #2
    Jim Breazeale
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    SWB and LWB rear rotors are not interchangeable. They have very different offsets.

    Jim
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  3. 09-13-2020, 09:07 AM #3
    blue72s
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    OK thanks.

    Cheers.
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  4. 09-14-2020, 09:34 AM #4
    Bobs 67S
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    Blue72s, do a search on "1967 911S rear brake" you should find a group of posts from the guys in England, also PMB Performance in Utah, that were making hardware to adapt the 1969 rear thru spacers and mounting collars which balanced to increased front caliper performance upgrades.
    Bob
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