I'm running a 2-ring setup on my Uzzi SLX (32t/46t), and the front derailleur is hitting the chainstay in the 180mm travel setting. Since I only use two rings, I thought about using a road derailleur instead, since it doesn't extend as far down. But Shimano doesn't make 34.9mm front road deraillleurs. Anybody know if it's possible to buy some sort of adaptor clamp to use with the derilleurs for braze on mounts? Or any other solution? I guess I could try and move the derailleur up an inch, but ut doesn't seem right do do so...
Road front derailleur on an MTB?
- Thread starter Ole
- Start date
So, yes, there is such thing as a 1-3/8" adaptor clamp for braze-on ders. But here are a couple more concerns for you:
- Capacity for the 14-tooth jump? Most double road ders have a ~12t maximum jump. 32-to-46 it would probably make (I'm running 36-48 on my cross bike with an Ultegra double just fine). If you ever decided to go 30-44 or 46, I think you'd be SOL. You may be able to fix that with a road triple -- but I'm not sure if that would be any better than a MTB triple.
- Most road ders are bottom pull. Not sure how the cables are routed on an SLX.
- Most road ders are bottom swing (cage below clamp). Not sure how much seat tube you have on a SLX.
- Capacity for the 14-tooth jump? Most double road ders have a ~12t maximum jump. 32-to-46 it would probably make (I'm running 36-48 on my cross bike with an Ultegra double just fine). If you ever decided to go 30-44 or 46, I think you'd be SOL. You may be able to fix that with a road triple -- but I'm not sure if that would be any better than a MTB triple.
- Most road ders are bottom pull. Not sure how the cables are routed on an SLX.
- Most road ders are bottom swing (cage below clamp). Not sure how much seat tube you have on a SLX.
run an xtr derailuer and you'll be fine. i was running a 29-42 w/ that set up and it worked just fine and have used it for a 30-44 and it works fine. just have to have someone set it up properly who has experience w/ working on 2x9 set ups.
But I think his problem isn't getting the 2 x 9 to work, its getting a front der to work without it hitting the chainstay in long travel mode. Is that right?
Of course, I shoud ask why a 2 x 9 setup is any different (in terms of front der position, chainstay clearance) than a normal 3-ring...
Of course, I shoud ask why a 2 x 9 setup is any different (in terms of front der position, chainstay clearance) than a normal 3-ring...
i don't think running a road front derailuer is going to cure the problem a road front derailuer is a tib bit longer then a mountain. so either way it will probably still hit the chainstay. the other thing i am thinking of is make the derailuer isn't properly positioned. might need to be centered a little bit more. a 2x9 system is only different in the jump between each ring. this jump causes a little more tinkering to get right. if you do not get the tension just right and the limits set up right its not goin to shift as well as it should be able to. the other thing you might possibly want to think about is running a triple w/ a road cassette......
Its hitting the chainstay how is a few degress of rotation going to help? and how will adding an extra ring to the crankset help?
A 2 X x system is easyer to set up than a 3 X x system. If you have a big ring set up as per the derr instructions if you have a small ring set up so the height is enough to stop the chain rattleing on the bottom of the cage when in the smallest cog.
If you have gripshift its a piece of piss otherwise it's not exactly tough.
If its hitting the chainstay it must not be high enough, move it up until it stops hitting and if it still shifts leave it.
Try a top swing derailleur.