XIKOBY Rear Wheel Assembly for Razor MX350 MX400 12.5x2.75 with Knobby Street Tire, #25 Chain Kit

XIKOBY's 12.5 x 2.75 rear wheel assembly is a preassembled replacement kit for Razor MX350 and MX400 electric dirt rockets, including a knobby street tire, rim, inner tube, 25H 132-link drive chain and essential installation hardware.

If you need to replace a worn rear wheel or renew the drivetrain on a Razor MX350 (V23+) or MX400 (V19+), this complete kit bundles the most commonly required parts in one shipment. It combines a 12.5x2.75 knobby street tire mounted on a rim with an inner tube, plus a heavy-duty #25 roller chain, master links, a chain breaker, and a tensioner — designed for a straightforward swap and reliable road performance.

Will this wheel fit my Razor MX350 or MX400 model?

The assembly is built specifically for Razor MX350 (V23 and later) and MX400 (V19 and later) models. Before ordering, verify your bike's model and release version to ensure compatibility. If your model predates the versions listed, consult your owner's manual or measure the existing wheel and chain.

• Wheel size: 12.5 x 2.75 inches (tire specification).
• Hub and spoke count: designed for 25H rims (25 holes).
• Chain spec: #25 roller chain, 132 links included.
• Recommended for MX350 V23+ and MX400 V19+ only.

How durable and ride-ready is the knobby street tire?

The tire uses a wear-resistant rubber compound and a knobby tread pattern to improve grip on pavement and light off-road surfaces. Its construction emphasizes shock absorption and anti-skid performance for everyday urban riding and occasional dirt paths. The preassembled rim and inner tube reduce the risk of installation errors that can affect ride quality.

• Material: high-quality rubber for abrasion resistance.
• Tread: knobby street pattern for extra traction.
• Comfort: design offers improved shock absorption.
• Assembly: delivered pre-mounted on rim with inner tube.

What drivetrain components are included and how do they help?

The kit supplies a full #25 roller chain with 132 links and ten master links so you can size and fasten the chain during installation. A dedicated chain breaker tool is included to shorten the chain without needing extra tools. The single chain tensioner helps maintain correct tension and reduce wear on sprockets and bearings.

• 25H chain, 132 links — enough length for most installations.
• Ten master links — quick connection and redundancy.
• Chain breaker — steel construction with corrosion resistance.
• Chain tensioner — keeps chain tensioned for smoother power transfer.

How easy is the installation for a home mechanic?

The wheel arrives preassembled, and the chain kit includes the pieces needed for sizing and securing, which simplifies a DIY replacement. A basic set of hand tools is usually sufficient: wrenches, pliers, and the included chain breaker. Follow Razor's service instructions or a step-by-step repair guide to ensure safe reassembly and proper torque on fasteners.

• Preassembled wheel reduces mounting steps.
• Included hardware: screws, red stem valve cap for finishing touch.
• Chain tools and master links make chain fitting straightforward.
• Recommended: verify torque specs from the bike manual.

Who is this for? This XIKOBY replacement kit suits owners of compatible Razor MX350 and MX400 electric dirt rockets who want a single purchase to restore rear-wheel traction and drivetrain reliability. It’s aimed at DIY hobbyists, home mechanics, and fleet maintainers who prefer a complete, ready-to-install solution rather than sourcing parts separately. If you’re unsure about fitment, measure your current wheel and chain or check the scooter/bike model revision before buying.