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.
Features
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Two-piece aluminum split rim: Separating rim halves simplify tire installation and inner-tube replacement.
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Versatile wheel application: For matching scooters, pocket bikes, go-karts, dollies, and carts; not limited to front-wheel use.
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Integrated disc brake mount: Provides a mounting point for a compatible brake rotor.
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Included sealed bearings: 6000RS bearings help keep contaminants out of the bearing assembly.
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Recessed rotor-side bearing: The brake-rotor-side bearing sits 15 mm recessed; compare this detail with your original wheel and spacers.
Specifications
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Brand: Universal Parts
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Part number: 144-5
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Part type: Split wheel rim
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Material: Aluminum
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Nominal rim diameter: 4 inches
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Rim design: Two-piece, bolt-together split rim
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Brake configuration: Disc brake mount
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Bearings: 6000RS sealed bearings, included
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Rotor-side bearing recess: 15 mm
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Primary tire application: 9 × 3.50-4
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Color: Silver
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Country of origin: China
Model Fitment
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.
| Tire size |
Fitment requirements |
| 9 × 3.50-4 |
Primary tire application; confirm tire requirements and rim width |
| 3.00-4 |
Confirm the tire manufacturer's approved rim width and required tube configuration |
| 4.10/3.50-4 |
Confirm the tire manufacturer's approved rim width, tube requirements, and equipment clearance |
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.
