The CrossMark 29" UST is a top-notch tubeless cross country racing tire. The nearly continuous center ridge flies on hardpack, yet has enough spacing to grab wet roots and rocks. The slightly raised ridge of side knobs offers cornering precision. The Maxxis Crossmark is a great way to get into the tubeless game and blend the advantages of the tubeless tire platform with your 29er rig for race-ready performance.
LUST/UST (Lightweight Ultimate Sidewall Technology): the outside of the casing is covered in a lightweight material and an airtight rubber compound resulting in a durable tire that is lightweight with excellent air retention
Features eXCeption: high volume 120 tpi casing and tire compound designed for lightweight cross country race use only
Fast-rolling center ridge with raised side knobs for better cornering
Adding sealants to Maxxis tires voids the warranty
The beads have a kink in them where they were folded! I have not been able to get them to seal with the Stans no tube kits. Not sure if it is the tire bead or the no tube kit. I cant get the tire to hold air for more than 30 seconds to maybe a minute! I have not tried to add the sealant from Stan's just yet, I think the tire should hold air for longer than that! I am going to try 1 more time before I send the tires back! The tire seems to be a great tread and I know others that have used them all over the US for racing and for fun and they say they are great.
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