Tested 3 tires today: http://bikeblather.blogspot.com/2013/04/more-roller-testing-results.html
1. Continental GP4000S 23C - new tire, only ~20 miles on the road, latex tube - "on road" Crr predicted to be .0034
2. Specialized All Condition Pro II 23C - well worn, "out of print", butyl tube (to reflect typical use) - "on road" Crr predicted to be .0062
3. Specialized All Condition Armadillo Reflect 25C - well worn, butyl tube (to reflect typical use) - "on road" Crr predicted to be a whopping .0077
That's a really good result for the GP4000S. That puts it basically in a tie with the 20C SuperSonic in my testing. Not bad...I have a suspicion that Conti keeps making this tire faster and faster somehow...
That All Condition Armadillo is a regular garden hose! One of the few times I've actually broken a sweat during roller testing just to keep it rolling...no lie.
Here are my overall charts of predicted Crr and 2 tire power as they currently stand:
http://bikeblather.blogspot.com/
1. Continental GP4000S 23C - new tire, only ~20 miles on the road, latex tube - "on road" Crr predicted to be .0034
2. Specialized All Condition Pro II 23C - well worn, "out of print", butyl tube (to reflect typical use) - "on road" Crr predicted to be .0062
3. Specialized All Condition Armadillo Reflect 25C - well worn, butyl tube (to reflect typical use) - "on road" Crr predicted to be a whopping .0077
That's a really good result for the GP4000S. That puts it basically in a tie with the 20C SuperSonic in my testing. Not bad...I have a suspicion that Conti keeps making this tire faster and faster somehow...
That All Condition Armadillo is a regular garden hose! One of the few times I've actually broken a sweat during roller testing just to keep it rolling...no lie.
Here are my overall charts of predicted Crr and 2 tire power as they currently stand:
http://bikeblather.blogspot.com/