UNITRAILER steel rim black 4.5ATx7" 3x90 ET:-1.8
UNITRAILER steel rim black 4.5ATx7" 3x90 ET:-1.8
The UNITRAILER 4.5ATx7" ET-1.8 steel rim in black is a solid rim designed for wheels used primarily in light trailers, transport carts, gardening and municipal equipment, and specialized utility devices. The rim has a mounting diameter of 7 inches and a width of 4.5 inches , ensuring stable tire seating and proper wheel operation in everyday use.
It is designed for tires with a 7-inch mounting diameter , i.e., models marked "-7" are designed for 7-inch rims. It may fit tires used on small trailers, carts, garden machinery, and transport equipment, among others, provided the recommended rim width meets the tire manufacturer's requirements.
The rim is made of steel , providing high mechanical strength and resistance to workloads. It features a black paint finish that protects the surface from corrosion and environmental influences. This makes the rim well-suited for utility applications where the wheel operates in variable terrain.
This model has a 3x90 bolt pattern , meaning the rim has three mounting holes arranged in a 90mm diameter circle. Bolt spacing is a key parameter when selecting a rim to ensure proper fitment to the vehicle's hub.
This rim is primarily used on lightweight cargo trailers, garden trailers, and older trailers with a 3x90 wheelbase. It can be used as a replacement part when renovating lightweight trailers, as well as on jet ski trailers, transport carts, beach carts, and low-bed transport platforms . It also works well on lightweight agricultural and gardening equipment , such as tillers, fertilizer spreaders, feed carts, and tractor-drawn equipment. Its small 7-inch diameter allows for a lower vehicle or device, while its 4.5-inch width allows for the use of a stable tire with a larger contact patch.
Rim offset (ET) is a parameter defining the distance between the rim's mounting surface and its centerline, expressed in millimeters. The ET value determines how deeply the rim sits in the wheel arch. With a positive ET, the rim sits deeper in the wheel arch, while with a negative ET, it protrudes further outward. Correctly selected offset is crucial for vehicle handling stability, avoiding friction with suspension components, and ensuring the vehicle's attractive appearance.
The center bore of a rim is the hole located in the center of the rim that fits onto the vehicle's hub. Its diameter must match the hub diameter to ensure the rim is properly seated and centered on the vehicle. The center bore plays a crucial role in transferring loads from the rim to the hub, which affects driving stability and safety. If the center bore is too large, hub centric rings are used to ensure a proper fit.
The "AT" rim flange profile designates a special rim shape used on small utility, gardening, agricultural, and transportation rims. This design ensures proper tire seating on the rim and stability during operation. The AT profile is primarily used on small-diameter rims intended for work equipment, trailers, transport trucks, and utility machines.
Rim cross-section profile refers to the shape of the inner portion of the rim, which includes both the flange and the surface on which the tire rests. This profile is critical to proper tire seating, mounting, and overall fitment to the vehicle's hub. H rim cross-section profile A rim with a single hump on the inside of the rim. This hump helps prevent the tire from slipping off the rim, especially when driving with low tire pressure or during sudden maneuvers.
