I recently bought a 95 civic si and found some 15 inch rims and I was wanting to lower my car but was wandering how low I can go before I start to rub any help?

 

That would depend on tire size and wheel width/offset.

 

This could get technical with offsets and specs but is a better fit for suspension and wheel. Which are separate, so misc I guess it is. GDD if it doesn't go technical I suppose would be next.

 

I found some 15x6.5 rims and 195/50r15 tires but don't know how low I could go before it started rubbing

 

Again, this depends on offsets and a million other things.

But you can probably lower the car about 3 to 4" before it starts rubbing.

Why are you asking this? Go lower the car. Stop when it rubs. That's how far you can go. You'll need to buy a full body adjustable suspension to go that low. Hopefully you're not trying this with stock shocks/konis/any other stock length shocks.

 

Ok.