Road brake help

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  • Road brake help
  • Premier Icon verses
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    My roady came with Cannondale C4 brakes. I keep having problems with them and am looking to replace them. I was going to grab some 105s but am not sure they’ll be compatible with my levers.

    I have the 2011 Sora shifter/levers (the ones with the little thumb shifter). Looking at the blurb on the Merlin site it says;
    Must be used in conjunction with ST-5700, ST-6700 or ST-7900 STIs for correct leverage ratio

    Will I be able to get away with using 105 calipers with the Sora levers or should I look at a lower spec caliper?

    105’s will work fine.

    TheDoctor
    Member

    105’s will be fine, swap out the stock pads for kool stop Salmons or Swiss stop for better performance though

    Premier Icon verses
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    Thanks for the advice.

    I’ve found this compatibility chart (at the bottom of the first page) which suggests Sora ST-3400 aren’t compatible with the 105 BR-5700.

    Why do Shimano say no? Are they just being overly picky, or will there be something noticeably incompatible about them?

    TheDoctor
    Member

    Slightly different cable leverage/pull in different sti’s . Means you won’t get optimum power but they will still work

    Premier Icon verses
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    I’m still struggling with what to get 🙂

    I’m not sure if I need long or short drop…

    Measuring from the mounting bolt to the mid-point on the pad is about 55mm, so presumably long drop… But my existing caliper looks to be able to cope with a range of 40-60mm, don’t all calipers do that?

    Premier Icon njee20
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    If you don’t plan to replace your STIs get the BR-5600s, they’re designed to work with the older STIs like yours.

    Premier Icon verses
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    Struggling to find the br-5600s, there’s one seller on eBay, but that’s all I can find.

    Premier Icon Nobby
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    What problems are you having with the C4’s?

    If it’s simply a lack of power then it may just be because the standard pads are shite so swapping ’em out for something decent makes a world of difference. Mine have been great since putting SwissStop greens in.

    Premier Icon joat
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    Surely pulling a cable is pulling a cable, your hand modulates the force.

    Premier Icon verses
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    The stopping power has been fairly bobbins, but they seem to have lost their ability to spring open. I’ve cleaned and lubed all the pivots and checked the cables are moving freely, but the rear refuses to spring back open.

    cyclistm
    Member

    I had the same with these brakes. Swap em for 105’s, it will be fine

    Premier Icon verses
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    Thanks for the help, I’ve ordered a 105 br-5600 rear from eBay.

    Premier Icon njee20
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    Surely pulling a cable is pulling a cable, your hand modulates the force.

    Nope – different leverage ratios – cantis and v-brakes are different too.

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