After (probably too much) reading, I've decided to go with the Tiagra 4700. It sounds to be more than enough for me, it should make my bike a bit more future proof, fix the issues I'm having, and give me the range I was after on the gears.
I'm going to start collecting the bits now.
A couple more questions have cropped up in my mind! I've always bought KMC chains, but I can't remember why! Are they still a good buy? Or should I stick with Shimano? If Shimano should I go with the Tiagra spec HG54 or is it worth spending a bit more? Also I can't measure how long I need as I don't have the other bits on the bike yet - I'm going with the 34/50 and 11/34 - will 114 or 116 be long enough?
Thanks
I'm going to start collecting the bits now.
A couple more questions have cropped up in my mind! I've always bought KMC chains, but I can't remember why! Are they still a good buy? Or should I stick with Shimano? If Shimano should I go with the Tiagra spec HG54 or is it worth spending a bit more? Also I can't measure how long I need as I don't have the other bits on the bike yet - I'm going with the 34/50 and 11/34 - will 114 or 116 be long enough?
Thanks