FLAT OUT is a Polish company specializing in the production of anti-tip inserts that guarantee reliable protection while cycling. Our inserts are designed and made in Poland, and our philosophy is based on simplicity and functionality.

FLAT-OUT semi <3CORE - An Anti-Piercing Insert That Keeps the Tempo.

If you dedicate your cycling seriously, then you know that an anti-piercing insert becomes an indispensable part of your equipment. There are plenty of options on the market to choose from, but know that there are no miracles. Each insert is a piece of polymer designed to keep the tire stable and protect the rim. Cheap models often fail, sometimes treated on par with expansion hoses, and more expensive options are often distinguished only by their colors.

The FLAT-OUT insert, however, is different. Designed and made in Poland, this insert has something extra that can tip the scales in your favor on the road.

• EASY INSTALLATION: The installation of this insert is extremely simple, allowing for quick and convenient installation, even for beginners.
• Protection against "snake bite": This insert effectively protects against the risk of catching a "snake bite", which increases the durability and safety of the bike.
• No sealant required: This insert is designed to require no additional sealant, eliminating the need for frequent maintenance.
• Minimum inner liner width of 26mm: With a minimum inner width of 26mm, this insert provides optimal performance for your bike.
• Maximum overall insert width of 46mm: This bike insert has an impressive maximum overall width of 46mm, making it versatile and perfect for a variety of riding conditions.
• Fits 2.35" tires - 2.80": This bike insert is ideally suited for tires ranging from 2.35" to 2.80" wide, providing optimal performance and comfort.