Are my pre-2021 ZIPP Firecrest rim-brake wheels tubeless-compatible? Pre-2021 Firecrest rim brake models are not tubeless-compatible and will not accept a conversion. Tubeless-compatible Firecrest wheels are identified by the updated ZIPP logo, shown in the photo below: Related articles Can I use a 12-speed Shimano HG cassette on a Zipp wheel? What is the recommended tire pressure to use for the Zipp 858 NSW or 808 Firecrest disc brake Tubeless wheel for my riding weight in PSI? What tires are compatible with Zipp 303, 404, and 808 Firecrest hookless rims? What tires are compatible with Zipp 303 S wheels? What are the tire pressure recommendations for my Zipp hookless wheel?