11-40 or 11-42 On The Back
I'm going to change my current 105 - 32/48 on the front with 11-34 rear to either 11-40 or 11-42 on the rear.
I'm caught between a rock and a hard place of preferring the lower gearing the 42 offers over the 40 but it does start to become a bit "gappy" on the bigger rings so interested in people's opinions generally and also if anyone else has done similar and if you'd choose the same again or a different cassette for either of the reasons I've mentioned..