cydewaze said:I've been using Continental GP 3000s for a few years now, and have been happy with them, especially in damp conditions. I go through them a bit quickly, but I'm a bit of a load to carry at 186 lbs (~84kg)
Are you heavy? That makes a bigger difference than the tyres. If you weigh 90 kgs and ride with mountaingoats at 60 kg, you will go downhill quicker. Aerodynamics also play a big part.Wurm said:Sorry guys, but the Mich's, Conti's and Vitt's mentioned are mere pretenders in the speed/fast rolling department compared to Vred Tri-Comp's & Fortezza's - especially in 25c size.
Don't think so? You should try me on a descent.
Been there, done that. Tried all the others. I WILL beat you to the bottom of the hill, as I always do with everyone in my group rides.
GPT said:Armadillos last a while but what are your favorite tires for speed? 700x23 or there abouts. I've tried Rubino & Bontrager and think the Bontragers are more comfortable but not a zippy. Thoughts?
I don't buy the "heavier goes downhill quicker" theory. As you may know, several hundred years ago Galileo did a similar experiment at the Leaning Tower of Pisa, only to find that a heavier object fell at the same speed as a lighter object, both being made of the same material and basic shape.Claes said:Are you heavy? That makes a bigger difference than the tyres. If you weigh 90 kgs and ride with mountaingoats at 60 kg, you will go downhill quicker. Aerodynamics also play a big part.
You need to qualify a bit more about your downhill statement before someone can understand wether it is the tyres or something else.
Wurm said:I don't buy the "heavier goes downhill quicker" theory. As you may know, several hundred years ago Galileo did a similar experiment at the Leaning Tower of Pisa, only to find that a heavier object fell at the same speed as a lighter object, both being made of the same material and basic shape.
But since you ask, I weigh about 196 lbs. and am 6' tall, so I do present somewhat of a larger "air brake" to the wind than many of the smaller members. I regularly ride with one guy that weighs maybe 8-10 lbs. less than me, and another that weighs about 25-30 lbs. more. Others in the group I would say are less than 180.
The wheelsets are all pretty close, with some being more aero I'm sure, and some less. I use Campy Zondas with 30mm. rims, which is no taller a rim than some others have, or of no fewer spokes. But really the aerodynamics don't come into play much at speeds under about 15 mph, where I still roll faster/easier than all of my mates. Then on the fast DH's, the rolling resistance seems to make an even greater difference.
All unscientific and anecdotal of course, but this has been my observation.
Maybe I'll try that Jay. But what explains (as I mentioned above) the fact that one of the guys who's at least 30 lbs. heavier than me hasn't beaten me yet on the descents?otherworld said:It's definitely your weight, maybe a bit to do with your aero wheels, but more about the weight. It's well known (we call it the fatty test) try swapping bikes with one of the others and you'll see.
Cheers Jay.
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