Re: Grand Bois Extra Legere tires now available
Posted: Tue Dec 11, 2012 6:42 pm
Hi,
If we agree that we're testing roling resistance and nothing else then let me tell you with 100% absolute certainty that there is 100% correlation between the results as found in the lab and in the real world.
IOW a tyre that does not show good rolling resistance figures in the lab won't roll well in the real world either and vice versa.
I personally do not object to the methodology used in that test it's just that some of the conclusions they draw from the outcome are completely off the wall.
Anyway, pls reread my previous post and maybe you'll understand it better.
Papers, what papers?
All it does is confirm (once more) what every engineer (and everyone with a bit of common sense for that matter) already knows for at least a century.
I'd be happy with that if it were not that they just had to add some complete nonsense which does nothing for their credibility, quite the opposite.
Ciao,
Testing on a steel drum may be more accurate and reproducible, but it has little, if any, relationship to real world use.
If we agree that we're testing roling resistance and nothing else then let me tell you with 100% absolute certainty that there is 100% correlation between the results as found in the lab and in the real world.
IOW a tyre that does not show good rolling resistance figures in the lab won't roll well in the real world either and vice versa.
I personally do not object to the methodology used in that test it's just that some of the conclusions they draw from the outcome are completely off the wall.
Anyway, pls reread my previous post and maybe you'll understand it better.
I'd suggest that you read the actual papers before passing judgement. Although I disagree with a significant amount of what I read in Bicycle Quarterly, Jan and his fellow testers deserve to be commended for actually attempting to do an analysis that approximates actual riding conditions.
Papers, what papers?
All it does is confirm (once more) what every engineer (and everyone with a bit of common sense for that matter) already knows for at least a century.
I'd be happy with that if it were not that they just had to add some complete nonsense which does nothing for their credibility, quite the opposite.
Ciao,