Shimano Drive Train Mix n Match

Discuss light weight issues concerning road bikes & parts.
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Joined: Tue Jan 16, 2018 4:39 pm

by WorkonSunday

Hi all,

I know 11 speed drive trains are more or less trouble-free when doing mix n match, but im curious if i can mix the lower tier groupset. the one i have in mind is based on a triple set up. Everything is Sora R3000 (Triple) but swap the crank for Tiagra 4700 Triple 50/39/30.

The gear ratio are exactly the same as full Sora set up, but just abit lighter by going Tiagra crank. Shimano's own compatibility chart does not show this combination, but my gut feeling is that is just because their table layout does not allow it. The only thing i can think of being abit different is the chain link size (being 9 speed vs 10 speed). Any one tried this combo ? thanks :mrgreen:
In the house: Colnago V1r, Colnago A1r, Wilier Cento1 Air, Scott Scale 700SL, Bianchi FSE, Colnago Concept, Colnago A1r, Specialized Ruze Pro, Wilier GTR

by Weenie

Posts: 4606
Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

Think the chainring spacings or spider thicknesses are slightliy different 9 to 10. Fractions of a mm though.

Saying that, all it means in reality is that instead of having rubbing in 2 gears at each extreme, you have rubbing in 3........ i've run 10 speed triple (MTB though) on other wise 9 (or 8 ) speed set ups with no issues other than as above. Which are only gears i use when testing indexing on a workstand!

Hopefully someone who has done the same change as you (or has the parts to hand) will be able to confirm.

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