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Tubeless sealant and Crr
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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
Last edited by: Xavier: Jun 17, 20 8:59
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Re: Tubeless sealant and Crr [Xavier] [ In reply to ]
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My conclusion is that tubeless for anything less than 30c is a pain in the ass.
Latex tubes with more supple non-tubeless tires is superior.
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Re: Tubeless sealant and Crr [Xavier] [ In reply to ]
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Good to see a confirmation of my results that a road tubeless tire with a latex tube and set up with 30ml of sealant roll the same...makes for easier testing of tubeless-ready tires on my roller setup :-)

As for how much sealant...well, the only tubeless tires I'm running for road purposes is a pair of 32C Conti GP5000 TLs...and I set those up with 60ml of Orange Seal in each initially, and then top off with ~30ml when a "dipstick" test through the valve (core removed) indicates minimal liquid sealant remaining. Then again, for the purpose (as evidenced by the size) I'm more interested in potential flat prevention than outright speed on those tires.

http://bikeblather.blogspot.com/
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