Tire fitment. E39 528i. 15" tires

I have a set of 15" style 29 wheels. They are 15x7 offset 20

I have a set of barely used 15" Bridgestone Blizzak tires that I took off another car.

15" tires for the E39 are 225/60-15
The Blizzaks are 195/65-15

There is a 2.5% difference in circumference between the two tires. When the speedo reads 60mph, I will actually be at 58.5mph. I am ok with that for tires that will be on the car for the next 2 months.

Other than the speedo difference, does anyone foresee problems with putting the 195/65-15 tires on the 15x7 wheels?

Thanks.