Do a alittle research and maybe check with your LBS but 175 cranks are long for your height. You should be on 170's or at the longest 172.5. Yes it seems like the difference is so slight as to be unnoticeable but trust me there are differences and if doing longer rides, you will feel it both in leg fatigue and in performance. Now it's not unusual to have different cranks length on different bikes especially if the bikes are designed differently and used differently but you still need a crank that fits your size.