Zero flats. More grip. Keep attacking.

G-Mousse Front Medium replaces the inner tube with a dual-heat polymer insert built for Goldentyre 21" fronts. You run low equivalent pressure without the fear of a pinch or a thorn ending the day — more carcass on the ground, more confidence into rocks and roots.

Built for

MX · Enduro · Extreme · Cross Country on 21" fronts in the Medium volume class.

Pairing

• GOP3172AA · GT216AA 80/100-21 — Est. 12–14 psi
• GOP3177N · GT216AA 90/90-21 — Est. 10–12 psi
• GOP3180 · GT222 Razor Blade 80/100-21 · GOP3181 · GT222 Chubby 90/90-21

Catalog size map: 80/100-21 MX · 90/90-21 Enduro · 90/100-21 Extreme (Medium feel). For plush Fatty / firmer 90/90, see MOU2001N Front Large. For firm rally Fatty, see MOU2002N Front XLarge.

Specs

• Code: MOU2000N
• Size class: Front Medium · 21"

• Construction: dual-heat polymer insert (replaces inner tube)
• Flat protection: 100%% competition flat-proof when correctly fitted
• Feel: fixed equivalent pressure (typical market range ~0.7–0.9 bar / ~10–13 psi; see pairings for estimates)
• Included: mousse lube
• Use: off-road / competition only — not road legal
• Fitment: designed for Goldentyre tyre carcasses (other brands may differ in section and wall thickness)
• Care: avoid prolonged asphalt and extreme heat (premature wear)
• Note: no warranty for improper use