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  1. #1
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    R-500 8spd brifter won't span triple crank

    Hi. New to the forum (forums) and I need your help.
    New Shimano 8 spd brifters. Left side (front) does only 1 2/3 swipes of upshift, which only gets through two of the three chainrings. 2/3 into the second swipe it stops just before the second click. With a return back to vertical a third swipe goes less than a click before coming to a stop (with no actuation of the cable if it is connected). The brifter behaves this way whether or not there is any tension or even a deraileur cable attached.
    Is this normal? Shouldn't the brifter make a full second swipe to get to the 1st or 3rd chainring?

    (The XT deraileur shows full range of motion when I manually stress the cable by pulling sideways on the section along the down tube, so the brifter seems to be the cause.)

    Thanks!

  2. #2
    bike whisperer Kimmo's Avatar
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    1. New 8spd? You mean new old stock?

    2. Are you sure you have a triple front shifter? Most are doubles. The third click is a trim position to prevent the FD rubbing.

  3. #3
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    Yes new 8spd. The R500 is a 105 level 8speed shifter still made (presumably) for high end vintage replacement and touring bikes. It's listed to be compatible with 2 or 3 chain rings.

  4. #4
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    The instructions indicate that FD 3300 front deraileur should be used for 2 chain rings and FD 3303 deraileur with 3 chain rings. Is this my problem? Are the R500 and XT front deraileur incompatable??

  5. #5
    bike whisperer Kimmo's Avatar
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    Uh, I think the MTB FD uses a different actuation ratio these days, IIRC.

    Quote Originally Posted by jonli View Post
    Yes new 8spd. The R500 is a 105 level 8speed shifter still made (presumably) for high end vintage replacement and touring bikes. It's listed to be compatible with 2 or 3 chain rings.
    Hey wow, neato.

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