525

The Superlite RS7 Series rear sprocket is the #1 selling steel racing sprocket on the market today. The unique RS7 spoke design offers superior strength with maximum weight reduction making it the lightest and strongest steel sprocket available. All Superlite steel sprockets meet or exceed O.E.M...

I have only found this on ebay from the uk. Any suggestions?

I am changing the gearing and I have always used a 520, even racing years ago. My dealer advised me against it for the 1199 and said I should stick with the 525. I guess it is not needed but again I have always put it on my bikes. Any thought would be appreciated. Am I just being silly.

So i try to search it but all i got are brand names.. sales... I look for performance but not loosing so much for street use. Whats the wear from alloy to steel? In miles or km Whats the wear like from 520 to 525?? I dont know which i should buy. I dont want to change front sprox...