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Trinity Auto Parts supplies tested used OEM steering knuckles, spindles, and wheel hub and bearing assemblies for cars, trucks, and SUVs, with VIN-matched fitment, a warranty on every part, and free shipping across the USA and Canada. Front and rear knuckles are available, with or without the hub assembly attached.
The steering knuckle is the cast or forged upright that carries the wheel hub and bearing and connects them to the control arms, ball joints, strut, and tie rod end. A bent or cracked knuckle throws off the alignment and cannot be straightened, so the fix is a replacement. Because knuckles are structural and rarely wear on their own, a used OEM knuckle from a low-mileage donor is usually the most sensible option, and every knuckle we sell comes from a well-maintained running vehicle, fully tested and inspected, and matched to yours.
Each knuckle is checked for cracks, bends, and damaged threads or bearing bores. When the hub assembly is included, the bearing is spun to check for roughness and play. Parts that show impact damage are rejected.
Knuckles differ by side, by drivetrain, by brake size, and sometimes by trim level. We match the part to your 17-digit VIN and confirm left or right, front or rear, and hub configuration with you before dispatch.
Every knuckle and hub assembly ships with a warranty, up to two years on select parts, and the exact term is stated on your quote. Shipping and return shipping are free across the USA and Canada.
We have supplied used and remanufactured auto parts since 1990 and are BBB accredited. Suspension and steering parts are a core part of what we ship every week.
If your bearing is good, buy the bare knuckle and transfer the hub. If the bearing is noisy or the hub is pressed into the knuckle, a knuckle with the hub already installed saves press work at the shop. We quote both when both are available.
Call +1 725-208-4566 or email [email protected] and we will tell you what is on the part, whether the ABS sensor is present, and which side it fits before you commit.
This guide is for anyone replacing a steering knuckle, spindle, or wheel hub assembly after collision damage, a pothole hit, or a failed bearing. Decide first whether you need the bare knuckle, the hub assembly alone, or the knuckle with hub installed, because each is a different part.
A steering knuckle is the cast or forged upright at each front corner that holds the wheel hub and bearing and connects them to the ball joint, strut or control arm and the tie rod end, so the wheel can turn while carrying the vehicle's weight. Many people call it a spindle; on independent rear suspensions a similar non-steering knuckle carries the rear hub.
For a knuckle, buy used OEM. A knuckle is a structural casting with no seals or moving parts of its own, so there is little to remanufacture, and a straight used knuckle performs the same as new. Remanufactured or new parts matter more for the hub and bearing assembly.
| Factor | Used OEM | Remanufactured |
|---|---|---|
| Condition | Original casting, inspected for cracks, bends, and thread damage | Rarely offered for knuckles; applies to hub and bearing units |
| Typical cost vs new | Often 50–70% less than a new dealer part | Less than new, more than used |
| Availability | Good for most vehicles | Hub assemblies only |
| Best for | Bent or cracked knuckles, collision repairs | Worn bearings where the knuckle is fine |
Listings vary with how the donor vehicle was dismantled, so we confirm contents before shipping.
| Component | Usually included? | Notes |
|---|---|---|
| Knuckle casting | Yes | Sold by side and position |
| Wheel hub and bearing | Varies by listing | Many ship with the hub installed; confirmed before shipping |
| ABS wheel speed sensor | Varies by listing | Transfer yours if not present |
| Brake caliper bracket and dust shield | Varies by listing | Rotor and caliper not included |
| Ball joint (when pressed into the knuckle) | Varies by listing | Ask if yours is knuckle-mounted |
Request a quote with the form above or call +1 725-208-4566.
The knuckle is the structural part that bolts to the suspension; the wheel hub assembly is the bearing unit that mounts in or on the knuckle and lets the wheel turn. On many trucks and SUVs the hub is a bolt-on unit with the bearing sealed inside and the ABS sensor built in. On many cars the bearing is pressed into the knuckle. If you only need a bearing, order the hub assembly. If the knuckle is bent or cracked, order the knuckle.
A front steering knuckle has a steering arm for the tie rod end and pivots on the ball joint or strut so the wheel can turn. A rear knuckle, found on vehicles with independent rear suspension, does not steer; it holds the rear hub and locates the rear control arms and toe link. The two are not interchangeable. Vehicles with a solid rear axle have no rear knuckle, so a problem at the back of a solid-axle truck usually means a bearing or axle shaft.
The word spindle is used two ways. On older rear-wheel-drive cars and many 2WD trucks, the spindle is the fixed stub shaft that the inner and outer wheel bearings ride on, either cast with the knuckle or bolted to it. In everyday use, spindle is also another name for the whole knuckle. Tell us whether you need the bearing shaft, the full knuckle, or both, and send a photo so we can confirm the design.
No programming is needed for a knuckle or hub assembly. A shop will separate the ball joint, tie rod end, and strut or upper arm, remove the CV axle nut on driven axles, and transfer the brake bracket, dust shield, and ABS sensor if they are not included. Pressed-in bearings require a hydraulic press, and the axle nut must be torqued to specification and often replaced. A wheel alignment is required after any knuckle replacement.
| Item | Detail |
|---|---|
| Delivery | Typically 3–5 business days in the continental US; Canada and freight items can take longer. |
| Warranty | Up to 2 years on select parts; every part ships with a warranty — the exact term is on your quote. |
| Returns | Free return shipping. |
| Coverage | USA & Canada. |
The steering knuckle is the upright that holds the wheel hub and bearing and connects them to the ball joint, strut, and tie rod end. It needs replacement when it is bent or cracked, usually after a pothole, curb strike, or collision, which shows up as an alignment that cannot be corrected on one corner.
The knuckle is the structural casting that bolts to the suspension, and the wheel hub assembly is the bearing unit that sits inside or on it and lets the wheel spin. A noisy bearing calls for a hub assembly; a bent or cracked part calls for a knuckle. Some listings include both together.
It varies by listing. Many used knuckles come with the hub and bearing still installed, which saves press work if the bearing is in good condition, while others are sold as bare castings. We spin-check any included bearing and confirm exactly what is on the part before it ships.
Yes. We supply bolt-on hub and bearing assemblies on their own for vehicles where the bearing is the only problem, as well as complete knuckles with the hub installed. Send your VIN and tell us which corner you need, and we will quote the option that fits your repair.
Often, yes. Many people use spindle to mean the whole knuckle. Strictly, the spindle is the stub shaft on older rear-wheel-drive cars and 2WD trucks that the wheel bearings ride on, which may be part of the knuckle or bolt to it. Tell us which design you have and we will match it.
No. A front knuckle has a steering arm for the tie rod and pivots so the wheel can turn, while a rear knuckle on independent rear suspension holds the rear hub and does not steer. They are also side-specific, so we confirm front or rear and left or right against your VIN before dispatch.
Yes. Steering knuckles, spindles, and hub assemblies ship free across the USA and Canada. Delivery is typically 3–5 business days in the continental US, and Canadian orders can take longer. Your quote includes the estimated delivery time and the warranty term for the part.
Your 17-digit VIN, the year, make, model, and trim, the drivetrain (2WD, 4WD, or AWD), and which corner you need: front or rear, left or right. A photo of the old knuckle showing the bearing bore and ball joint mount helps us confirm the design before the part is dispatched.
Return shipping is free. Every knuckle and hub is matched to your VIN and confirmed by side and position before dispatch, which prevents most fitment issues. If a part still does not fit, contact us and we will arrange the return at no cost and source a correct replacement or issue a refund.
