The Stan's Race Day Tubeless Sealant is a high-crystal-concentration tubeless tire sealant developed in collaboration with world-class athletes and their mechanics, targeted at riders preparing for race day or long-distance events. Built on the same proprietary liquid base as Stan's Original Tubeless Sealant, the Race Day formula increases sealing crystal content by 200% and adds XL-sized crystals capable of repairing larger punctures than the standard formula. The sealant must be installed by pouring directly into the tire over the bead — it is not compatible with valve-core injection or syringe-style installation tools. Stan's recommends visually inspecting sealant levels every 2–3 weeks to monitor liquid volume, as the Race Day formula has a faster dry-out rate than the Original. One liter seals up to 16 tires, with per-tire volume requirements varying by tire size — consult Stan's sealant volume charts for tire-specific guidance.
Formula contains 200% more sealing crystals than Stan's Original Tubeless Sealant formula
Added XL-sized crystals extend puncture repair capability to larger cuts and holes
Shares the same proprietary base formula as Stan's Original Tubeless Sealant
Must be poured directly into the tire over the bead, valve-core or injector installation is not compatible
Stan's recommends inspecting sealant levels every 2–3 weeks to monitor liquid volume
Store in a cool, dry place away from direct sunlight and extreme temperatures to maximize shelf life
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Joshua
⭐⭐⭐⭐⭐
Everything was great. Was waiting for the SL9 to release since the first leak. Going from a SL7 was night and day.
Also Sierra Bicycle Supply, was amazing. Will be shopping here plenty more. The service they displayed was top tier, from the order placing online all the way to the delivery.
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Casey Sparks
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Fast shipping and perfect frame set as described. It's literally the lightest built MTB I've ever felt. My wife will be smashing on it at this year at the Leadville 100. LFG Thanks guys!
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The CLX III are exceptional I was a little apprehensive about buying them having ridden the Enve 4.5 but you feel less crosswinds and their lighter and spin fast. The spokes seemed to offer a lot of dampening vibration. Win win in my book.
