How does those front tires affect your mpg and rpm?
It took about 1.5mpg off the meter, but since the speedo is not true, its prob 1mpg. Also, it does effect acceleration from 45+mph. Its basically changed the gear ratio. But on the flip-side, its a MASSIVE IMPROVEMENT in forward traction. The larger sidewalls reduced lateral traction, but that's likely more to do with this being a $76 tire.
From a stop, its extremely better if your car has "above stock" tuning. My car hooked on stock tires, when it was stock. After the TBE and cobb tuner it hurt the tires feelings in about all areas. When I put the stg3 tune on it with E30, it was all over. Stock tires were a waste. I felt like I was drive a wheel spin / torque steer monster focus ST. The tires gave up somethings, but they also increased traction where I needed it. I'm happy with the results.
Keep in mind... A different brand tire may not fit as they vary in size, despite the calmed size.