X-Grip HulkyBoy 90/100-21 "Fat" Extreme Enduro Front Setup.

X-Grip HulkyBoy 90/100-21 "Fat" — Extreme Enduro Front Setup

The HulkyBoy Fat is X-Grip's go-to front tyre for extreme enduro riders who need maximum volume and grip in the most demanding terrain. The oversized 90/100-21 Fat carcass gives you a larger contact patch, better rock and root absorption, and serious confidence on steep technical climbs. Paired with the EV-2 Fat Mousse and a 1.4-1.6 rim lock, this is a complete, puncture-proof front setup ready to race.

What's in the bundle

• X-Grip HulkyBoy 90/100-21 "Fat" — oversized extreme enduro front tyre, aggressive knob pattern, built for the hardest terrain on the calendar
• X-Grip EV-2 90/100-21 Fat Mousse — designed specifically for the Fat carcass; zero puncture risk, consistent feel, no inflation required
• Rim Lock 1.4-1.6 — keeps the tyre and mousse locked tight under extreme braking and rock strikes

Why Fat? The Fat carcass runs wider than a standard 90/100-21, giving you more volume and a more forgiving ride feel on rough, rocky ground. If you're riding hard extreme enduro events or just want the confidence of more rubber between you and the terrain, this is the setup.