Shimano 39t to a 36t??

GER 67
GER 67 Posts: 54
edited October 2014 in Workshop
I have a Shimano Ultegra sl 52/39, I need to change the inner ring to a 36t, Am i looking in the wrong places, cos i cant find one that fits my Ultegra sl. Will FSA chainring fit shimano Crank?
Kuota

Comments

  • keezx
    keezx Posts: 1,322
    Does it have the traditional 130 mm BCD?
    No 36 will fit , 38 is the smallest as you can see by looking ar it.
  • Ber Nard
    Ber Nard Posts: 827
    The manufacturer isn't important, the primary concern is the bolt circle diameter (BCD). A 36t chainring would need to have a BCD of 110mm or smaller. As you've got 52/39 chainrings I'd guess that you've got cranks with a 130mm BCD and the smallest you can go is (I think) 38t.

    If you want lower gears, you're easiest option will probably be changing the cassette.

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