Thorn Cycles Forum
Community => Thorn General => Topic started by: aesmith on July 29, 2008, 10:10:00 AM
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Hi,
Just wondered what front mechs people used on the Mk.3. The bottle cage mounts limit where you can fit the mech, and for example I find that a standard Shimano 105 double can't be fitted low enough to a 50/34 chainset. Unfortunately none of the manufacturers specifications give the relationship between the clamp and the cage, so its hard to see how to find a more suitable mech other than by trial and error.
I might want to change to a 48 tooth front ring, which would make it even worse.
Anyone uses a double with 50 or 48 tooth ring? If so, what mech do you use?
Thanks in advance, Tony S
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Try using:
http://www.sjscycles.co.uk/product-SJSC-Powerplay-Band-On-Clamp-for-braze-on-front-derailleur-Black-14720.htm
With a braze on mech, the slot should give you enough adjustment.
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Cheers. Did you find that a standard double didn't work? What size front ring do you use?
My current set up, a 50/34 double with the Shimano 105 double mech, actually works OK although the mech is higher than it should be.
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Never tried it, I work on parts here at SJS and was just suggesting an option that would extend your adjustment.
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Never tried it, I work on parts here at SJS and was just suggesting an option that would extend your adjustment.
I'll bear it in mind. A bit of a bodge though, don't you think, and would indicate that they've put the braze-on in the wrong place? The strange thing is that Thorn are 100% positive that a triple mech should fit low enough, but can't tell me which one I should be looking for. Maybe only the Tiagra mech works, and that would be a shame as the rest of my set up is 105, so that would mean mixing 9 and 10 speed parts.
Tony S