gaima

Hey all,

So, I'm looking at putting together a flat bar touring type bike, and really want hydraulic discs and Di2 (cos I'm a nerd!).
XTR M9050 Di2 seems a really nice set, and considering another option I was looking at isn't silly expensive.

There is a big, or rather a small, problem though. The chain rings. They're too small.

As a complete groupset it comes with a 40x30x22t chain set and a 116 link chain.
Does anyone know if Di2 can cope with the chainset/chain rings being changed?

Also, so far I've not been able to find another Shimano triple set for 11 speed with the same 10 and 8 tooth difference.
Closet I've found is the 105 5703 triple, that's 50-39-30t, but designated a 10 speed part.


My main concern with this is syncro-shifting, and the overall ratios, might not cope with different differences between chain rings.
Plus chain length.


Thanks
Mike

ColinL

explain. if the triple chainrings are too small, why do you need a MTB triple? it seems like a road double would be more what you need.

have you put the various combinations through a gear calculator? 50/34 cranks with 11-32 cassette is quite a lot of gear range for touring.