I just ordered these today from Discount Tire. They didn't have any in stock locally so I gotta wait 'til Friday at the earliest to get them installed. I've had them on previous rides and loved the performance and grip of them. Check them out...
http://www.discounttiredirect.com/direct/f...rd=18&ar=40

How do they compare against the NT 555? I ve got the 555 and they hold like a dream.

I'd say it would be close, but I would think the Neo Gen has a slight edge.