Picked up a Felt 9Solo earlier this summer. I have been out a few times, mostly on easier trails. I am seriously thinking of racing it but definitely need to change the gearing. It is currently a 32/19. I am thinking of 32/16. Or am I better of changing chainring and rear gear? And how do I adjust the eccentric bottom bracket. I see the openings for the hex wrench and the pin spanners. Do I need to take of the crank to adjust the BB? That would seem to defeat the purpose of having the chainring on to keep the chain tight. Any help would be really appreciated.