New Shimano 105

Meirion658
Meirion658 Posts: 20
edited May 2010 in Workshop
Excuse my ignorance here but new to all this!!! Over the past few months I have slowly been upgrading my group set to Shimano 105. I have just noticed that they have just released a new 5750 compact chainset which is cheaper that the 5650. Provided that I buy a 5700 BB will this work with the rest of the 105 kit that I have bought my shifters are 5600 double. On the bottom of description they quote.
“For use with ST-5700, ST-6700 or ST-7900 STI Shifters”

Comments

  • thel33ter
    thel33ter Posts: 2,684
    Don't hold me too it, but I don't see why not.
    And now you know, and knowing is half the battle
    05 Spesh Enduro Expert
    05 Trek 1000 Custom build
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  • Meirion658
    Meirion658 Posts: 20
    That's what i cant understand but i hope some experts come along soon and advise :? :?
  • herusix
    herusix Posts: 55
    I think the latest 105,Ultegra and Dura-ace Shifters only work with the latest Derailleurs however and are not backward compatible with older groupsets, you should be able to use ANY road-crank though new or old.
    Dialled Bikes Prince Albert MTB

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  • ariege_cyclist
    ariege_cyclist Posts: 98
    I think that this is because the chainrings on the new Shimano kit are an additional 1mm further apart. I have no idea if this actually makes it impossible to use the older shifters with the newer chainsets, but I can see that it could introduce a few problems. (It might be worth a try as there is lots of marketing BS about compatibility issues to get us all to upgrade our entire groupsets every time we replace any other component).

    I'll be interested to know because I fancy a new chainset but can't afford new shifters too so that would rule Shimano for me, perhaps I'll have to look at SRAM or FSA.

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