I am putting together my 510 and have run into the issue of wheels. I have a set of 13x7 libres but they are too wide to fit under the fenders. I want to run 15x7s with probably about 25mm offset. Now I'm looking for the lightest wheels possible. I can't afford to spend 3 grand on some magnesium wheels unless someone has a source for much cheaper. Every pound counts, especially in the wheels and tires. I like the ROTA grid classic but have no clue if it comes in the right size and bolt pattern. Any suggestions?