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Front derailleur

Old 04-10-19, 05:00 PM
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Rgbraun1
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Front derailleur

New here and new to road biking. Bought a used road bike in very good shape but the “nub” that catches the spring is broken off. What can i replace it with, the derailuer that is. The one on there now is a (gonna write everything I see) Shimano Tiagra 31.8 FD 4408 9 speed.
Thabks for your help
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Old 04-10-19, 05:32 PM
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rhenning
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Take all your info and shop a bike shop or E-Bay with it. That way you know it will work. Roger
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Old 04-10-19, 06:33 PM
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KCT1986
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Welcome to the forum!
Few questions for you to clear-up and hopefully others will be along to help you.
Is the # 4408 or 4403?
Overall does the bike seem to have mostly Tiagra parts? Shifters, crankset, rear derailleur? So we can judge if this bike is mostly a complete OEM build.
Triple crankset?
Nine cogs in the rear?
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Old 04-10-19, 07:45 PM
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Rgbraun1
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More info

it is 4403. Sure looked like a 4408. Rear deraileur is a 105 and the shifters are Tiagera Flight Deck 9 speed.
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Old 04-10-19, 08:13 PM
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It seems you have a Tiagra 9-speed triple front derailleur with a 31.8 mm (1-1/4") diameter clamp. They aren't that expensive if you find a direct replacement but a 1-1/4" clamp isn't all that common. You may do better to find a 1-1/4" diameter accessory clamp and use a "braze-on" front derailleur. You could use a 9-speed triple front derailleur from the 105 group too and it would be a FD-5503.
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Old 04-10-19, 09:37 PM
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KCT1986
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The next series Tiagra, FD-4503 for triple was also still 9 speed and should be fine.
Another upgrade would be FD-6503, Ultegra level.
Newer 105 & Ultegra (x600) series are 10 speed. Since I don't use a triple crankset, not sure how a 10 speed FD would work on a 9 speed. Maybe someone who uses this combo will share their experiences.
MTB FD have different chain cage shape for optimum shifting for smaller chainrings (42t-46t) and not road rings (50t-53t).

Last edited by KCT1986; 04-10-19 at 09:46 PM.
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Old 04-10-19, 09:55 PM
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Rgbraun1
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I can’t seemnto find any of the suggested replacements new. Several used, beat up ones. Also, thanks for the great info. Learning a lot.
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Old 04-11-19, 08:46 AM
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Originally Posted by Rgbraun1 View Post
I can’t seemnto find any of the suggested replacements new. Several used, beat up ones. Also, thanks for the great info. Learning a lot.
I see a new old stock FD-5504 that would be a suitable replacement.
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