Bora Wheel Spacers for Kubota Tractors
Our Kubota tractor wheel spacers deliver the track width expansion you need for stability on hillsides, snow removal, and loader work. Engineered from billet aluminum with precision CNC machining, these spacers fit Kubota's bolt pattern and hub bore perfectly, maintaining factory wheel alignment while adding 1.5 to 2 inches per side. We designed them for operators who run oversized tires, need better weight distribution for implements, or want improved traction on uneven ground.
Every set ships with hardened steel wheel studs that exceed OEM torque specifications, plus installation instructions specific to Kubota models. Whether you're running a compact utility tractor or a mid-size ag model, these spacers give you the footprint and clearance to work safely without compromising steering response.
What makes these spacers work for Kubota
Why Kubota Operators Choose Bora Wheel Spacers
Kubota tractors are known for compact maneuverability, but that narrow stance becomes a liability when you’re operating on slopes, loading heavy implements, or running larger ag tires. Bora wheel spacers for Kubota give you the wider footprint that prevents tipover risk during side-hill mowing, snow blowing with a heavy bucket raised, or hauling loaded trailers on uneven ground.
The billet aluminum construction we use weighs less than steel alternatives while delivering superior tensile strength and fatigue resistance. Each spacer is machined from a solid block of 6061-T6 aluminum, not cast or welded, so there are no weak points where cracks can form under repeated load cycles. The anodized surface finish bonds at the molecular level, protecting against corrosion even when exposed to fertilizer, hydraulic fluid, or road salt spray.
Sizing and Compatibility for Kubota Models
We offer Bora wheel spacers in 1.5-inch and 2-inch widths for Kubota tractors. The 1.5-inch version works for operators who need modest tire clearance or a slight stability boost without altering steering feel dramatically. The 2-inch spacers are popular for compact tractors running R4 industrial tires or ag models with loaded rear tires where maximum track width improves hillside safety.
Bolt Pattern Match
Kubota uses two primary bolt patterns across their tractor lineup: 6-lug (typically on B-series and smaller L-series models) and 8-lug (common on larger L-series, M-series, and MX-series tractors). Confirm your model’s bolt pattern and hub bore diameter before ordering. Most B-series and BX-series compact utility tractors use a 6-lug pattern with a smaller hub bore, while L3901, L4701, M5-111, and MX5400 models use an 8-lug pattern with a larger hub bore.
Installation and Torque Specifications
Installing Bora wheel spacers on your Kubota takes about 30 minutes per axle with basic hand tools. Jack and support the tractor securely, remove the factory wheel, slide the spacer onto the hub, and thread the new longer studs through the spacer into the hub. Mount your wheel onto the spacer’s outer face and torque the lug nuts to your Kubota model’s specification—typically 80 to 120 ft-lbs depending on stud size.
We recommend applying anti-seize compound to the stud threads and checking torque after the first 10 hours of operation, then again at 50 hours. The hardened steel studs we supply resist thread galling and won’t stretch under load like softer OEM replacement studs sometimes do. Each kit includes a torque specification sheet specific to Kubota lug nut sizes.
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Common Questions About Kubota Wheel Spacers
Our Kubota wheel spacers are designed for the most common bolt patterns found on B-series, BX-series, L-series, M-series, and MX-series tractors. Kubota uses primarily 6-lug and 8-lug configurations depending on model size. You'll need to confirm your specific tractor's bolt pattern, hub bore diameter, and stud size before ordering.
Most compact utility models like the BX2380, BX2680, B2650, and smaller L-series tractors use a 6-lug pattern. Larger models like the L3901, L4701, M5-111, M6-141, and MX5400 typically use an 8-lug pattern. If you're unsure about your model's specifications, check your operator's manual or contact us with your model number and year for fitment confirmation.
Two-inch spacers add 2 inches per side, so your overall track width increases by 4 inches total. If your Kubota currently measures 60 inches from outside tire edge to outside tire edge, it will measure 64 inches with 2-inch spacers installed.
This additional width improves stability significantly for hillside work, loader operations, and heavy implement use. Keep in mind that the wider stance may affect whether your tractor fits through narrow gates, barn doors, or equipment trailers. Measure your existing clearances before selecting spacer thickness if you have tight access points on your property.
Yes, we recommend checking and re-torquing lug nuts after the first 10 hours of operation, then again at 50 hours. This allows the assembly to settle and ensures the fasteners maintain proper clamping force. After the initial break-in period, follow your normal maintenance schedule for lug nut inspection.
Use a calibrated torque wrench and follow Kubota's torque specification for your model, typically 80 to 120 ft-lbs depending on stud size. Apply torque in a star pattern to ensure even clamping pressure across all studs. The hardened steel studs we include resist stretching, but periodic checks are part of good tractor maintenance practice.
Yes, our spacers are fully compatible with liquid-filled tires and bolt-on wheel weights. The 6061-T6 aluminum construction and hub-centric design support the additional rotating weight without flexing or creating bearing stress. Many Kubota operators add spacers specifically to improve stability when running loaded rear tires for traction or front wheel weights to balance loader capacity.
The wider track width actually reduces frame stress when you're carrying heavy wheel weights because the load is distributed over a broader footprint. Just ensure your wheel studs and lug nuts are torqued properly to handle the increased mass, and inspect the spacer mounting surfaces periodically for dirt buildup or corrosion.
Wheel spacers do not change your tractor's steering geometry or turning radius—the wheels still pivot on the same steering axis. However, the wider track width can make the tractor feel slightly different in tight turns because the outside wheel travels a longer arc. Most operators adapt to this within a few hours of use.
Steering effort should remain unchanged because the spacers don't add rolling resistance or alter the tire scrub radius significantly. If you notice increased steering effort after installation, check that the spacer hub bore is clean and properly seated on the hub, and confirm your wheel bearings are in good condition.
Spacers are the most cost-effective and reversible way to increase track width on a Kubota tractor. Replacing axles or switching to different offset wheels involves much higher cost, more labor, and potential compatibility issues with your existing tires and hubs. Spacers install in under an hour per axle with basic tools and can be removed if you sell the tractor or change equipment needs.
Unlike offset wheels, spacers maintain your factory wheel and tire investment. The hub-centric design preserves bearing alignment and doesn't introduce the stress concentrations that come with welding or pressing custom hubs. For most operators, spacers deliver the stability and clearance benefits of a wider stance without the complexity or expense of axle modifications.
Wheel spacers are legal for agricultural and off-road equipment in most jurisdictions, including tractors used on public roads at low speeds for farm-to-field transport. However, regulations vary by state and locality, so check your area's equipment width limits and accessory component rules before transporting your tractor on public roads.
Our spacers meet SAE and ASTM material standards for wheeled equipment, and the hardened steel studs exceed OEM fastener specifications. If your local regulations require specific certifications for road-legal accessories, contact us for documentation. Most farmers and property owners use spacers on tractors that operate primarily on private land with only occasional road crossings, where standard farm equipment rules apply.