Alpinestars Youth Fluid Apex v2 Pants

Entry-range youth MX pants for track and trail

The Youth Fluid Apex v2 Pants are Alpinestars' entry-range motocross pants for kids, made for club days, practice and trail riding rather than serious racing. Fluid is the relaxed end of the Alpinestars MX line-up, and the build is simple and tough: a lightweight 600D polyfabric chassis with a second layer of 600D over the seat and knees, synthetic leather on the inner knees where the pants rub on the bike, and stretch corduroy panels at the crotch, knees, back yoke and inside legs so young riders can move. Pre-curved legs with a 3D pattern, a mesh lining, ratchet closure and a zip fly.

Sizing

Youth sizes 22 to 30 (waist, inches), with the 30 added so bigger kids can stay in youth gear a season or two longer. The relaxed fit leaves room for youth knee guards underneath at their normal size, and the ratchet closure takes up the waist as they grow.

Match it up

Pairs with the Youth Fluid Apex Jersey. Add Youth Radar Gloves and SX-1 Youth Knee Guards to finish the kit. Adult version: the Fluid Apex Pants.

The Youth Fluid Apex V2 Pants are performance-driven MX pants designed for young motocross riders who need comfort, mobility, and durability across track and off-road riding. Constructed from lightweight yet robust 600D polyfabric with reinforced seat and knee zones, stretch corduroy panels, and an ergonomic pre-curved fit, they deliver secure bike feel, lasting comfort, and freedom of movement in the riding position.

• Rider mobility: ergonomic cut and pre-curved shaping support a natural riding position, helping young riders stay comfortable during active MX sessions.
• Inclusive youth sizing: the additional size 30 expands the fit range, making it easier for more riders to find a precise match.
• Reinforced 600D polyfabric at the seat and knees provides increased durability in key wear zones.
• High-performance synthetic leather reinforced inner knees strengthen bike contact areas for added durability.
• Ergonomic cut and 3D pattern construction.
• Stretch corduroy fabric panels at crotch, knees, back yoke, and inside legs.
• Ratchet closure, mesh lining, zippered fly.