15t front is cheaper and the bike can pull even taller gearing just fine. It has enough torque that I can creep at 20 MPH in 6th gear, roll the throttle and it pulls and accelerates without stuttering or hesitation. The engine and FI are that good. Next drive set will probably be 15 CS and a -1 or 2 rear, and I'm 200 lbs. and carry a passenger and ride it hard on mountain roads. I'm a guy who ran the lowest gearing on his KTM950SMR that I've ever heard of BTW. The stock Ninja 300 gearing is just way too low, unless it was a real endure bike. It had a stock first gear similar to my woods gearing on my EXC530! The Adv or at least super moto style with this engine would be a treat. Of course, a real SS with decent suspension right out of the gate would have been nice too! I'm thinking about shortened WP 48mm KTM forks and a sumoto brake again with a tapered handle bar. I have the triples already. My rear end is great with the GSXR shock. The forks are flexing around under heavy loads from cornering and braking. I doubt the aftermarket brace would be enough to really stop that.