Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the new April's Giveaway for a Chance to Win the Euybike S4 Pro Max ebike worth $1299


A Front Derailleur mounting and matching problem.
#1
Hello,

I have a Scott Sub (hybrid) from 2008. The stock components (mostly Shimano mountain bike components) were old and wearing out so i decided to strip the bike and replace pretty much everything with new and upgraded components. I decided to change the drive train to road bike components (a 10-speed rear cassette and a two-chainring set up front) and went about purchasing them.

Put everything on with the last major part being the front derailleur and it was here I ran into a problem. I’d bought a Tiagra front derailleur, FD-4600-B, and when it came to attaching it I found that the seat tube was, at the point of clamping, widening gradually making the clamping unstable.

Checking the old front derailleur, I realised it was a top-swing model which fit nicely on the parallel tube-sides at the bottom section of the seat tube. The new Tiagra bottom-swing front derailleur had to clamp further up onto the section of the seat tube that was widening.

I wonder if anyone could help me:
1) Is there a front derailleur that is top-swing, works with a 16t-difference front chainring set (50/34) and indexed (Tiagra SL-4600) shifters?

2) I have seen top-swing derailleurs on the Shimano website but they are for a three-chainring setup or if a dual-chainring setup they are spec-ed at 14t. Would the former work well enough with my front shifter?

3) Is there something else I haven't thought of?

Thx
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
Tour of Luzon 70 years of Filipino Cycli...
Today 01:22 AM
What are the best cost effective ways to...
Today 01:19 AM
RECOMMENDATION
Today 01:04 AM
Injury Recovery
Yesterday 07:33 PM
Good morning form Alberta CA
Yesterday 09:40 AM
Unlocking speed on my e-bike.
04-27-2025 01:04 PM
MTB handlebar width
04-27-2025 06:25 AM
What is your favorite MTB trail/route in...
04-27-2025 06:16 AM
Bridgestone Blouson bike.
04-26-2025 07:57 PM
Thoughts on paceline riding
04-26-2025 05:51 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. GirishH
22 posts
no avatar 2. enkei
16 posts
no avatar 3. Flowrider
15 posts
no avatar 4. meamoantonio
15 posts
no avatar 5. SPINMAN
13 posts