Hehe, 21" biceps if you do, i'm impressed! Mine are 16" tensed, I train 4-5 times a week and supplement with protein powders (various), creatine (BSN cellmass) and will be taking a BSN NO-Xplode soon. My best achievement was being just shy of 15 stone at 8.9% bodyfat around about a year ago, although Ive lost almost a stone since then as i'm now training as a scaffolder and riding a lot more and find it impossible to get enough calories! I have no idea what my 1-rep max bench is as I can't see the point in doing it and my chest is one of my weakest muscle groups! Anyway, I would say that to a point, being stonger does not make a massively difference to how big your riding is... IMO its more about technique and confidence!