depends on what medicine , and what you consider leading , some companies lead on road , some on mtb , some companies just lead in sales cuz of size , we will never know , all i know is we dont need the gp5000 when the 4000s2 worked for years , corporation dont usually make products to benefit the people , they use the people to add more power to their leverage of a specific market until they are the largest organization , some companies have tested tires but who now how re-lie-able they are , there are so many factors that can go into tires so its really just up to the person to find the best tire , and rim , and bike ,
