Missing Cooling Fins
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  1. #1
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    Missing Cooling Fins

    I'm installing r8070 disc brakes. The rear brakes came with pads and cooling fins installed, but the front brakes do not have the cooling fins. Is it safe to use them like this?

  2. #2
    tlg
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    I use pads without fins. No problem.
    I don't ride my brakes and I don't live in mountains with miles long descents.

    But it's odd that your pads came without them.
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  3. #3
    'brifter' is a lame word.
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    You do know that Shimano makes a bunch of brake pads that don't come with fins, right?
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  4. #4
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    So why did my rear brakes come with fins and my front ones didnít?

  5. #5
    'brifter' is a lame word.
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    The only 2 reasons I can think of are:

    You ordered them that way and didn't realize it.

    Or:

    The place you ordered from doesn't know the difference and/or screwed with them. I've never seen flat mount calipers w/ non-fin pads.

    There are 3 non-finned pads for the calipers you have...
    K02S Resin
    K03S Resin
    K04S Metal

    and 3 finned pads...
    L02A Resin
    L03A Resin
    L04C Metal

    If it were me I'd just use the current pads and then replace w/ finned resin pads. Don't overthink it.
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  6. #6
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    Quote Originally Posted by cxwrench View Post
    Don't overthink it.
    Yeah. Brake pads worked fine for YEARS before the finned style arrived relatively recently.

    The pads on my cars have no fins and I've yet to have them fail on me.

  7. #7
    'brifter' is a lame word.
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    Actually it doesn't matter at this point as the OP needs to order different calipers because his frame isn't flat mount. I'll bet this time the front comes w/ fins and the rear doesn't. The fins aren't 'installed' either...they either come w/ them or they don't. You can't add fins to non-finned pads.
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  8. #8
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    The brakes are for a flat mount frame, and the flame is flat mount as well I bought the group set from Merlin. There were a few small issues with it. One shifter had an olive already inside of it, but the other one didnít. The rear brake has pads with separate fins. The front brake has pads but no fans. I was concerned that the fins hold the pads in position. Merlin also told me that the system was supposed to come with the easy joint fittings, but it did not. They said that they checked their remaining stock and everything else has the joint system. Not impressed.

  9. #9
    'brifter' is a lame word.
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    Your frame is not flat mount, it's post mount. The fins are not separate, they're part of the backing plate. The backing plate holds the pad in position via the threaded pin or the cotter pin that goes through the caliper/pad backing plates/spring. Fins have nothing to do w/ holding the pads in nor locating them in place. Generally Shimano hydro levers will come w/ olives installed.

    The fun of ordering parts on the internet. Yay.
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  10. #10
    Cleavage Of The Tetons
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  11. #11
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  12. #12
    'brifter' is a lame word.
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    Quote Originally Posted by TiCoyote View Post
    Yeah, it is. I confused this thread w/ the one with the guy that ordered flat mount brakes for his post mount frame. @bleckb or something like that. Carry on.
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