Okay guys, here is where I am at. I am looking at a SRAM Force groupset. The Crank is Carbon Compact 50/34 172.5mm. My current Tiagra Crank is a Standard 53/59 175mm.

From what I understand in making this change, I am decreasing the size of my crankset which means I will be able to spin slightly more. Also, compact cranksets are more suited to climbing, or should I say, make climbing slightly easier.

My last question is about the cassette. I currently have an Ultegra CS-6500 12x25 cassette. The Force groupset comes with an OG 1070 cassette and is available in multiple different 'teeth count' I should say? Would switching from the 12x25 I have now to something different offer lower gears for climbing?