I cycled through a plastic bag and it bust my rear derailleur apart. Photo attached. My bike is a Raleigh Equipe road bike, which looks like this: https://www.ecosia.org/images?q=raleigh+equipe+road+bike#id=EFEC15345FC6211574940A99C94FF6014623E79F
I have just bought this replacement rear derailleur: https://www.amazon.co.uk/gp/product/B0044DGH2E/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 and having received it, I think that it might be a bit too big and chunky. I also just noticed that amazon said it is for mountain bikes.
I think that rear derailleur capacity is around 24 (it's difficult to properly count).
Have I bought the wrong rear derailleur? If so, how do you find a good one for my bike. I wouldn't want to spend too far north of £35.