Does a 9-speed mech travel any different distance to an 8?
Check that the pull ratios aren’t different.
Ok, thank you for that.Good question.
More helpful answer: yes. See here...
Your question is still not clear but let me try.Ok, thank you for that.
To rephrase, @Yellow Saddle , I wish to continue using the RD-M410 I have, instead of buying an RD-M430 (which I just missed on the classifieds, dammit...).
So far as I can tell from the supplied link, all should be well. New cassette and new shifters, obviously, and they are all inbound.
If nothing else, I will try it and see! The new RD is not *that* pricey, but money doesn't grow on trees either, so if I can make it work properly, fine and dandy.
Thank you for your answers!
EDIT: I should also clarify my reasons: I'm going to fit a 12-36 cassette in place of an 11-34. The extra gear is not the issue but the larger sprocket. May well need an extender or a long B screw, of course.
Answer is still yes, so far as I can see, thank you.Your question is still not clear but let me try.
Derailers travel in two directions.
Lets treat up and down first. This has to do with sprocket size. Some can't handle sprockets above size X, others can. Look up if the derailer you have/want to use, can handle a sprocket up to the size you now want to fit. Remember that derailers have specific capacities. Capacity is a function of both front and back sprocket differences. That's been explained here plenty of times. Search how that works and then look up what the capacity and maxim sprocket size is whatever RD it is you want to use.
Now for left and right. Generally, all derailers can move far enough left and right to handle any number of sprockets on a cassette/freewheel. However, That doesn't mean that it is compatible when indexing. For instance. Shimano and Campag RDs are not compatible in spite of the fact that they can both move far enough right and left. Indexing as to do with how much it moves left or right with each click of the shifter. Even that is strange. For instance, on Shimano 10-speed road and 10-speed MTB shifters, the amount of throw (cable pulled per click) varies even though the distance the derailer moves is the same between the groups.
That's enough info for you to figure out if what you want to do, will work for you. You can work it out for there, no matter how you phrase your question.
Not really. If the pull ratios are different the rear mech won’t be compatible. It’s not a hard concept, what don’t you get?