Rear brake relocation
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  1. #1
    Noob! 1kk8's Avatar
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    Rear brake relocation

    Seems like one design flaw of the S3’s is the location of the rear brake caliper mounted under the swing arm. It is constantly pleated with rocks, road grime, etc. I know for the Bonnieville’s and Thruxton’s a caliper bracket is (or was) produced by Triumph Twin Power to move the rear caliper above the swingarm.

    Has something similar ever been produced for the Speed Triples?
    Last edited by 1kk8; 12-30-2019 at 06:34 AM.

  2. #2
    Citation of the Wrench and Nutdriver Speedy-Glez's Avatar
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    IIRC the sprint uses the same calliper but with a different bracket that sets the caliper in a different position than the S3... not sure as to what involves switching up.

  3. #3
    Noob! 1kk8's Avatar
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    Quote Originally Posted by Speedy-Glez View Post
    IIRC the sprint uses the same calliper but with a different bracket that sets the caliper in a different position than the S3... not sure as to what involves switching up.
    Interesting! I just took a look at the Sprint ST brakes and sure enough, they appear to be a mirror image. Curious why the engineers did these for the Sprint but no follow through on other models.

    Do you recall if the rear rotor size is 255mm for both bikes?
    Last edited by 1kk8; 12-30-2019 at 03:54 PM.

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  5. #4
    The "Friends" of Officer Frank Poncherello crashmasterd's Avatar
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    Quote Originally Posted by 1kk8 View Post
    Seems like one design flaw of the S3’s is the location of the rear brake caliper mounted under the swing arm.
    That's not a design flaw. It's done on purpose. The idea is this is a sport bike, with emphasis on handling. Therefore, lowering the center of unsprung mass by putting the caliper on the bottom makes sense. They really don't care about "road grime" on the caliper. On the early T-300 bikes the Speed Triple, Trophy, and the Daytona had the caliper on the bottom because they were "sport riding" oriented. However the Trident and the Tiger have them on the top. (So does the Thunderbird.) On the Tiger this is done to protect the caliber from damage from off-road use, which is a bit ridiculous since the T-300 Tiger could only be off-roaded by a superhero. All the T-300s where pretty heavy, and top-heavy at that. However the Trident was the bargain basement economy bike, so it was also mounted on the top for protection. As a custom-look bike, the Thunderbird had it there to keep it looking nice.

    That said, moving the caliper to the top does seem to make some sense, but then again the only single sided swing arm Triumph ever made that had it that way was the Sprint ST. I think you're making a mountain out of a mole-hill. I doubt it'll save you enough damage from "road grime" to make a bit of difference.
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  6. #5
    Noob! 1kk8's Avatar
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    Fair points crash

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    The "Friends" of Officer Frank Poncherello crashmasterd's Avatar
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    Don't let it stop you from doing it though. If you want. It's always cool to have something different.
    Quote Originally Posted by Bad Santa 1050 View Post
    Just when you think it can't get worse, Crash comes along and informs you that not only is the glass not half full, but it is stolen and contains a mix of horse semen, urine, laxative and viagra, right after you swallowed a mouthful...
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    ...no ink and going baconless on your bacon cheeseburger is about the most rebelious thing you can do these days.

 

 

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