We recently did a test on tubeless sealants amounts and the effect on Crr. Used a Continental GP5000 TL 25mm and Zefal sealant which is a pretty good go-to setup for long distance tri or fast training.
Results here: https://aero-coach.co.uk/...d-rolling-resistance
The TL;DR version is that zero sealant was the fastest, 10-30ml were all similar, and then 40ml and up was slower. Obviously zero sealant would be a poor life decision, and with a 25mm GP5000 you would be fine with 30ml but probably better to use more like 50ml for training. I'd also suspect that 28mm tyres would require more sealant to achieve similar results too. How much do people typically use? We did some internal work a while back and found that Zefal was good and have used/sold it ever since, but maybe a thicker sealant would perform differently.
AeroCoach UK
http://www.aero-coach.co.uk
Results here: https://aero-coach.co.uk/...d-rolling-resistance
The TL;DR version is that zero sealant was the fastest, 10-30ml were all similar, and then 40ml and up was slower. Obviously zero sealant would be a poor life decision, and with a 25mm GP5000 you would be fine with 30ml but probably better to use more like 50ml for training. I'd also suspect that 28mm tyres would require more sealant to achieve similar results too. How much do people typically use? We did some internal work a while back and found that Zefal was good and have used/sold it ever since, but maybe a thicker sealant would perform differently.
AeroCoach UK
http://www.aero-coach.co.uk