Universal Parts 4-Inch Aluminum Split Rim - Disc Mount

This Universal Parts 4-inch aluminum split rim makes tire and tube changes easier on compatible scooters, pocket bikes, go-karts, dollies, and other carts. The two-piece, bolt-together design separates for tire installation, so you do not have to stretch the tire over a one-piece rim flange. An integrated disc brake mount and included 6000RS sealed bearings provide the foundation for a matching wheel assembly.

Key Features

• Two-piece aluminum split rim: Separating rim halves simplify tire installation and inner-tube replacement.
• Versatile wheel application: For matching scooters, pocket bikes, go-karts, dollies, and carts; not limited to front-wheel use.
• Integrated disc brake mount: Provides a mounting point for a compatible brake rotor.
• Included sealed bearings: 6000RS bearings help keep contaminants out of the bearing assembly.
• Recessed rotor-side bearing: The brake-rotor-side bearing sits 15 mm recessed; compare this detail with your original wheel and spacers.

Technical Specifications

• Brand: Universal Parts
• Part number: 144-5
• Part type: Split wheel rim
• Material: Aluminum
• Nominal rim diameter: 4 inches
• Rim design: Two-piece, bolt-together split rim
• Brake configuration: Disc brake mount
• Bearings: 6000RS sealed bearings, included
• Rotor-side bearing recess: 15 mm
• Primary tire application: 9 × 3.50-4
• Color: Silver
• Country of origin: China

Compatibility

For matching mini gas scooters, stand-up gas scooters, pocket bikes, go-karts and micro go-karts, dollies, light mobility carts, light industrial material-handling utility carts, and other carts or custom small-wheel vehicles. Match the complete wheel, axle, and any brake or drive configuration. Suitable wheel position is determined by the equipment's setup, not a front-only designation.

Compare axle fit, hub width, bearing positions, spacers, and equipment clearance with your existing assembly before ordering. Where applicable, verify rotor mounting pattern, rotor alignment, and caliper clearance. For a driven-wheel installation, also verify drive mounting and alignment. A 4-inch rim diameter alone does not establish compatibility; confirm suitability for your equipment's load and operating requirements. The 15 mm measurement refers to the bearing recess, not a guaranteed brake-rotor or caliper offset.

Split-rim installation: Completely deflate the tire and tube before loosening any rim-half fasteners. Keep the tube clear of the joint when reassembling the rim, and follow the wheel and tire manufacturer's fastening and inflation instructions.

• Two-piece bolt-together aluminum split rim for easier tire and tube changes
• For matching scooters, pocket bikes, go-karts, dollies and carts; not front-only
• Integrated disc brake mount
• Included 6000RS sealed bearings
• Rotor-side bearing recessed 15 mm

Brand: Universal Parts; Part number: 144-5; Type: split wheel rim; Material: aluminum; Nominal diameter: 4 inches; Design: two-piece bolt-together split rim; Brake configuration: disc brake mount; Bearings: 6000RS sealed, included; Rotor-side bearing recess: 15 mm; Primary tire application: 9 × 3.50-4; Other tire sizes: 3.00-4 and 4.10/3.50-4 subject to approved rim width and clearance; Color: silver; Country of origin: China

Matching mini gas scooters, stand-up gas scooters, pocket bikes, go-karts, micro go-karts, dollies, light mobility carts, light industrial material-handling utility carts and other carts/custom small-wheel equipment; not front-only. Primary tire application: 9 × 3.50-4; 3.00-4 and 4.10/3.50-4 require approved rim-width verification. Match axle, hub, bearings, spacers, clearance, load requirements and any brake/drive configuration; rotor-side bearing recess: 15 mm.