Bicyclerollingresistance.com has started testing tubs
Looking at what they wrote they'll not get anywhere. Their methodology is quite ill-suited to get a meaningful comparison. Back about 15 years ago Jobst Brandt tried to do some tests but beyond demonstrating the impact of cement type and technique on rolling resistance he did not, I felt, get meaningful results either.. He believed to show that clinchers had lower RR than tubulars. Back then a friend was working with a number of elite cyclists and Continental and they got significantly different results. A poorly mounted tubular using glue tape, of course, won't deliver good rolling resistance but at the elite level tyres are neither poorly mounted nor do they use tape...
Looking at what they wrote they'll not get anywhere. Their methodology is quite ill-suited to get a meaningful comparison. Back about 15 years ago Jobst Brandt tried to do some tests but beyond demonstrating the impact of cement type and technique on rolling resistance he did not, I felt, get meaningful results either.. He believed to show that clinchers had lower RR than tubulars. Back then a friend was working with a number of elite cyclists and Continental and they got significantly different results. A poorly mounted tubular using glue tape, of course, won't deliver good rolling resistance but at the elite level tyres are neither poorly mounted nor do they use tape...