Old 04-15-15, 02:54 PM
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Originally Posted by squirtdad View Post
53 teeth may exceed the derailler capacity both max rings and range

tiagra 4603 is listed as max ring of 50 and max range of 20. A 53 ring exceeds both of these.

OP should check exact model and specs.

Some times you can run out of spec fine and other times you get goofiness
+1 Things will likely work much better with an FD designed for a 53T big ring. Not just the curvature of the cage (so you can mount it lower to the ring) is different, but the angle at which it moves inwards and down to the middle ring as well. The FD is less tolerant of "beyond spec" use than the RD, generally.
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