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Chain rubbing issue.

  • 26-08-2010 11:45am
    #1
    Mark OK
    Registered Users, Registered Users 2 Posts: 28 ✭


    HI,

    When I have my chain in the low chainring (39) and on the high gears on the rear cassette (11, 12, 13) my chain is rubbing of the higher chainring (53) is there any way of sorting this out with adjustment or will I have to change the crank/chainrings to a better quality (Currently have crappy FSA Vero)


Comments

  • #2
    Lumen
    Registered Users, Registered Users 2 Posts: 31,142 ✭✭✭✭Lumen


    Mark OK wrote: »
    When I have my chain in the low chainring (39) and on the high gears on the rear cassette (11, 12, 13)

    You're not supposed to do that, it's called cross-chaining. Some groupsets have a front derailleur trim function to prevent it, but you'd still be using a wonky chainline.


  • #3
    Raam
    Registered Users, Registered Users 2 Posts: 14,317 ✭✭✭✭Raam


    Almost everyone's chain will rub in those extreme gear combinations.


  • #4
    Mark OK
    Registered Users, Registered Users 2 Posts: 28 ✭Mark OK


    Thanks for that, I'd never heard of cross chaining before, you learn something new every day.


  • #5
    route66
    Registered Users, Registered Users 2 Posts: 1,012 ✭✭✭route66


    I'd say there are 2 things to consider here:
    1. Using low-low or high-high (or close combinations) is not to be recommended. It puts undue stress on the chain and gears leading to excess wear
    2. Should the chain rub? I'd say using the 3rd highest cog at the back and the smallest chainwheel on the front is hardly extreme use. As above, it will be better to use a different combination to achieve the same gearing, but should the chain rub in this gear? The answer is no


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