Honda: Honda Accord EX 1991 not going straight, wheel alignments, wheel alignment

Question
Hi,
I have recently upgraded the size of my tires and rims (on my Honda Accord EX 1991) from 14" rims with 185/70R14 tires to 15" mags with 205/60R15 tires. Since I did that, it seems like i need to put my steering wheel about 10 degrees right in order to go straight. So when my steering wheel is straight my car goes left a little (specially on the highway). I was wondering, could that be a wheel alignment problem due to the change of tires or could that be related to the up sizing of the wheels? Please help me find the problem because I do not have lots of money to waste and don't want to pay for a wheel alignment if it is not necessary.

Thanks,
Nicolas

Answer
make sure the tires are not directional if they have an arrow to indicate direction of rotation make sure they are going the right way.also check the tire pressure. if both appear in order have the alignment checked.wheel alignments are not thet expensive it will save your new tires and some gas.