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1

You can grease the bearings, but the grease won't last very long. Better to just clean and oil them, using chain oil. Do this when you clean & oil the chain. If the derailer is really gunked up, here is what I do: Lean the bike against a wall, with the derailer facing out. Make sure you're on a surface that won't mind getting a little oil and dirt ...


4

The replacement of the 9 speed Shimano road RD with a 9 speed Shimano mountain RD is fine -- the cable pulls are the same. You'll need to re-size (i.e. put on a longer) chain for the bigger cassette though. As for the crankset swap, I think with the new cassette it isn't going to be necessary. In any case, the Sora FD-3403 (which is what you likely have) ...


0

I have that problem with my road bike as well, Shimano sora STI shifter, claris derailleurs, 2x9 setup. What I did : make sure limit screw (L) adequately adjusted, i.e. just about to rub the chain when Small CR + Largest Cog. (so you are ok here) shifting in sequential manner. e.g. 2-9 then 2-8, 2-7 ... 2-5 (or 2-4); at this point, shift to 1-5 (or 1-4) ...


1

I wouldn't expect to throw the chain inwards or outwards (at least on my 3x8 setup) if the limit screws are correct. This is true whatever sprocket I'm using and even if I push the lever the wrong way (it's not unknown when I'm tired especially if I've recently been riding another bike). That said you shouldn't be shifting like that as you acknowledge. ...


-3

Smaller components need much finer machines (higher cost) to manufacture. When precision scales up, so does cost of manufacture. Larger items are easier to manufacture. When it comes to performance, apart from materials, there is often a large cost associated with the type of manufacturing process involved.


1

I have been having a similar problem of ghost shifting on my full suspension mountain bike. This first started after breaking my chain on a ride. When I replaced the chain, I also decided to replace my rear derailleur cables and their sleeves. After noticing the symptoms I ended up replacing the rear cassette based on advice from a bike shop. Following ...



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