[lutach]

With 12S, I would recommend the following: Neu 1527/1.5Y and 1527/2.5D. With 10S I would go with: Neu 1527/2D and 1521/1.5Y. Now if those are 2 big then use the following: With 10S go with the 1515/2Y and 12S go with 1515/2.5Y. Geared properly, they can give you great run times and cooler too.