Bike Forums - 3x10 Tiagra front mech compatibility

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SquishyBiker

05-09-20 03:08 AM

3x10 Tiagra front mech compatibility

Hi peeps, just wondering if anyone has any ideas on front MTB mech compatibility with Tiagra 4703 STI shifter pull ratios
I have had an SLX derailleur modified so my SLX 22/30/40 cranks work with my STI shifter, but I'm wondering if theres a front mech that won't need mods.

Doug64

05-09-20 11:31 AM

Is your chainline 45-46 or 50?

SquishyBiker

05-09-20 01:04 PM

Quote:

Originally Posted by Doug64 (Post 21464855)

Is your chainline 45-46 or 50?

Chainline is 50mm

Doug64

05-09-20 01:26 PM

That could be an issue. Most road front derrailleurs ore designed for a 45-46 mm chainline. I'm assuming that your bottom bracket has external bearings. There is a thread about 9 spd crankset with the same problem. The discussion there is probably applicable to your question.
Deore M591. . . . . . ..

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