I noticed a vibration in the front of my car on the way home last night, when I got home and inspected it, I found a knot on the front passenger side. I have the original donut spare, will it be fine on the front or should I take one of my back tires off and put on the front and put the spare on the back? It has to make it till payday, and I dont know if the smaller front tire will hurt the front end at all..

 

On the front is fine. Driving for more then the posted 50 miles is fine. Just make sure that the tire has the proper 60psi in it as they WILL slowly go down over time. That is the critical thing to watch for. The donuts are low profile, so if you don't have the proper inflation level, they will roll off the rim if you do hard cornering.

Don't hotdog it, don't drive too fast - 50 is the recommended max speed.