New answers tagged compatibility
If your cassette is 10 speed, you need a 10 speed chain. The derailleur will be fine.
The hoods are different for different models of levers, but the ST-2200 uses the same ones as the ST-3300. The part you need is Shimano Y-6CU 98040. Ask your LBS to find it for you. Alternatively, you can look for 3rd party manufacturers as well but I doubt they will have something for an entry level part like this. Shimano's documentation indicates that ...
Have not seen 27 x 1/2 tires before but the old 27 x 1 1/4 rim probably will not care if the width is greater. One question is whether the wider tire will clear your frame.
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