Originally Posted by
prj71
What evidence do you have to back this statement up?
I have put thousands of miles on grand prix line of Conti tires and they have been great.
I have to agree, nothing wrong with Conti tyres, they're certainly not "crap".
However, they do make a broad range of tyres, according to what you need: speed, durability, grip, price, etc. This is true of all tyre manufacturers - look at Michelin, Vittoria, etc.
I've got Conti UltraSports on one bike, and find them pretty darn good overall; however, if I compare them to the Vittoria Corsa G+ on another bike, they aren't as nice (fast, light, grippy); but the Vittorias are 2x the price.