My bike was in a small accident and the crankarm was bent. So, I need a new crankset. The bike is a hybrid Cannondale Quick. It has a Shimano 48/38/28 chain rings and 170 arms. I asked my LBS if there were any cranksets that didn't cost a huge amount with 165 crank arms. I favor the shorter length. Also, my bottom bracket is grinding so I figured I would change that at the same time.

Anyway, they sold me a Sora crankset and and new kind of bottom bracket, not the square taper that I am used to, and the tool to put on and take off the new BB. My issue is the crankset. It turns out that it is has 50 teeth on the big ring and 30 on the smallest. Did they sell me something that is not going to work well with my front derailleur? Does this mean a lot of adjustment on the front? I am wondering if I made a bad purchase. As everything is still in boxes I trust I can return them.