What gear ratio are you guys running ? And where are you from ? What kind of riding do you do ? I have tired a couple of combo's ...but now that it's time to get a new chain and sprockets looking for the best mid line rear, so I can get a good change from grunt to top speed with changing the front ....thinking of going 50t rear and changing between 12-13 front......Am I making sense ?I ride everthing from 5th gear wot tracks to nasty rut,crumbly rock infested, vertical climbs....