Z1R Ace Replacement Helmet Liner for Transit & Transit Royale – 3XL, 4mm (Part# 0134-0321)

Keep your Z1R Transit or Transit Royale helmet performing at its best with the Z1R Ace Replacement Liner. Engineered specifically for 3XL helmet sizes, this 4mm liner delivers a snug, comfortable fit that enhances both safety and ride comfort. Built from durable materials, it resists wear and maintains its shape over time — so your helmet stays fresh and properly fitted mile after mile.

Installation and removal are quick and tool-free, making it easy to swap liners for cleaning or replacement. Whether you're refreshing an aging helmet or dialing in the perfect fit, the Z1R Ace Liner is the OEM-compatible solution riders trust.

Key Features:

• OEM replacement liner for Z1R Transit and Transit Royale air helmets
• Sized for 3XL helmets; compatible across 2XS–2XL Z1R helmet range
• 4mm thickness for optimal cushioning and secure fit
• Tool-free installation and removal for easy maintenance
• Durable construction for long-lasting comfort and performance
• Part Number: 0134-0321 | Brand: Z1R | SKU: 0134-0321