Narrow track widths and vague cornering feedback are the two fastest ways to ruin an otherwise capable ATV. A carefully selected set of wheel spacers transforms how your machine plants its tires, sharpens steering response, and gives you the freedom to run larger rubber without rubbing fenders. The catch is that not all spacers deliver the same structural integrity or bolt-up precision.
I’m Amir — the founder and writer behind Four Wheel Ask. My approach to evaluating ATV components focuses on material grades, machining tolerances, stud quality, and aggregated owner feedback to separate the parts that hold up over seasons of abuse from those that introduce more problems than they solve.
Track width, hub bore fitment, and stud pitch are the three non-negotiable specs that determine whether a spacer will bolt on safely or create vibration and clearance headaches. Understanding these variables is the key to choosing the best atv wheel spacers for your specific machine and riding style.
How To Choose The Best ATV Wheel Spacers
Selecting the right spacer set starts with understanding your machine’s bolt pattern, hub bore diameter, and stud thread pitch. These dimensions must match exactly for the spacer to seat flush and carry load without excessive stress on the studs. Beyond fitment, material quality, stud grade, and thickness determine how the spacer holds up under trail abuse, mud, and repeated high-torque events.
Bolt Pattern and Hub Bore
The bolt pattern (4×110, 4×137, 4×156) must match both your vehicle hub and aftermarket wheel. The hub bore — the center hole size — must be equal to or larger than your vehicle’s hub lip. A hub-centric fit where the spacer centers on the hub rather than the lug studs reduces the chance of vibration and wheel separation. Always check the center bore specification before purchasing.
Material Grade and Stud Strength
Premium spacers are machined from 6061-T6 aircraft-grade aluminum billet. This alloy offers high strength-to-weight ratio and excellent corrosion resistance when anodized. Studs should be heat-treated 10.9 or 12.9 grade carbon steel — these ratings indicate tensile strength sufficient for off-road loads and high-speed riding. Lower-grade studs risk stretching or shearing under heavy use.
Thickness and Stance Considerations
Thicker spacers widen the track for improved stability but increase stress on wheel bearings and suspension components. A 1-inch to 1.5-inch thickness per side is the sweet spot for most utility and sport ATVs. Always verify that the spacer thickness leaves enough thread engagement on your existing studs — if the studs protrude beyond the spacer face, trimming or different spacers may be needed.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| RockTrix 2″ 4×137 | 4×137 | Wide Stability | 2″ thick, 110mm bore, M10x1.25 | Amazon |
| KSP 1″ 4×156 | 4×156 | Precision Fit | 1″ thick, 131mm bore, M12x1.5 | Amazon |
| FLYCLE 1.5″ 4×156 | 4×156 | Trail Control | 1.5″ thick, 131mm bore, M12x1.5 | Amazon |
| Rough Country 1.5″ Can-Am | 4×137 | Can-Am Defender | 1.5″ thick, 6061 aluminum | Amazon |
| KAX 1.5″ 4×137 | 4×137 | Kawasaki/Can-Am | 1.5″ thick, 110mm bore, M10x1.25 | Amazon |
| ATV Eng. 4pc 1″ 4×110 | 4×110 | Complete Set | 1″ per side, 83.97mm bore | Amazon |
| GAsupply 1.5″ 4×110 | 4×110 | CFMoto/Segway | 1.5″ thick, M12x1.25 studs | Amazon |
| FLYCLE 2″ 4×156 SAE | 4×156 | Polaris Models | 2″ thick, 3/8-24 studs | Amazon |
| PHILTOP 2″ 4×110 | 4×110 | Suzuki/Honda | 2″ thick, 74mm bore, M10x1.25 | Amazon |
| YHTAUTO 2″ 4×110 | 4×110 | Multi-Brand | 2″ thick, 74mm bore, M10x1.25 | Amazon |
| ATV Eng. 2pc 1″ 4×110 | 4×110 | Budget Entry | 1″ per side, 83.97mm bore | Amazon |
In‑Depth Reviews
1. RockTrix 2 inch ATV Wheel Spacers (4×137, 110mm Bore, M10x1.25)
RockTrix has built a strong reputation in the off-road spacer market by focusing on precise CNC machining and consistent material quality. This 2-inch 4×137 set is machined from aerospace-grade 6061-T6 aluminum billet and finished with an anodized coating that resists corrosion from mud, moisture, and winter road salt. The 10.9 grade heat-treated carbon steel studs provide ample tensile strength for aggressive riding on rough terrain.
The 110mm hub bore accommodates most Kawasaki, Can-Am, and Bombardier applications with a 4×137 bolt pattern. Owner reports from Can-Am Outlander 650 and Polaris RZR 200 installations confirm a flush hub-centric fit with no vibration after initial installation. The 2-inch thickness delivers a noticeable improvement in cornering stability and allows clearance for larger aftermarket tires without rubbing frame or suspension components.
One reviewer noted that the stud spacing measured slightly wider than spec at 137.5mm, which made wheel mounting tight — this appears to be an isolated tolerance issue rather than a pattern defect. Most users report straightforward installation with standard tools and no wobble after the recommended 25-50 mile re-torque interval. The value proposition at this build quality level is difficult to match.
What works
- Aerospace-grade 6061-T6 billet construction with anodized finish
- Heat-treated 10.9 grade studs resist shearing under load
- Consistent hub-centric fitment across multiple ATV and UTV platforms
What doesn’t
- Minor stud spacing variance reported on some units
- Best suited for 4×137 pattern vehicles only
2. KSP 4x156mm ATV Wheel Spacers 1 Inch with M12x1.5 Studs
KSP Performance targets the Polaris market with a 1-inch 4×156 spacer that emphasizes precise machining and robust hardware. The 6061-T6 aircraft-grade aluminum billet body is anodized for corrosion resistance, and the heat-treated 10.9 grade geomet bolts are designed to maintain clamping force under high-vibration conditions. The 131mm hub bore matches the factory specifications for Polaris Ranger, RZR XP 1000, and RZR Trail models.
Owner feedback from 2025 Polaris Ranger 1000 Premium installations confirms a direct bolt-on experience with no modification required. The included thread locker adds peace of mind for riders who frequently cross deep water or mud. One detail worth noting is the torque specification discrepancy — Polaris recommends 100 ft-lbs for factory lugs, while the spacer instructions suggest 70-80 ft-lbs. Most experienced owners split the difference around 90-95 ft-lbs without issue after several hundred trail miles.
The 1-inch thickness is conservative enough to avoid excessive bearing load while still providing meaningful track width improvement for stability in ruts and off-camber sections. The spacer accommodates 12×1.5 thread pitch wheels, which covers the vast majority of Polaris aftermarket and OEM wheels. A few users noted that no thread locker was included in their package, so verifying the kit contents before starting installation is advised.
What works
- Aircraft-grade billet aluminum with anodized surface protection
- Heat-treated 10.9 grade geomet bolts resist corrosion and fatigue
- Direct fit on late-model Polaris Ranger and RZR platforms
What doesn’t
- Thread locker not consistently included in packaging
- Torque spec mismatch between vehicle manual and spacer instructions
3. FLYCLE 4×156 ATV Wheel Spacers 1.5 Inch (4-Pack)
FLYCLE delivers a complete 4-piece set of 1.5-inch 4×156 spacers designed for Polaris Ranger and RZR models from 2013 through 2021. The standout feature here is the use of 12.9 grade carbon steel studs — the highest strength grade commonly available for automotive fasteners. Combined with 6061-T6 aluminum forgings and CNC automatic processing, the build quality exceeds what many name-brand competitors offer at a similar price point.
The 131mm center bore ensures a hub-centric fit on factory Polaris hubs, which reduces the likelihood of vibration at higher speeds. Owner reports from 2014 RZR XP 1000 installations note that the spacers bolted up cleanly with no trimming or stud interference. The 1.5-inch thickness strikes a strong balance between stance improvement and suspension geometry preservation — riders report noticeably better stability in whoops and off-camber turns without excessive steering feedback.
Packaging includes all four spacers with pre-installed studs, and the anodized finish has held up well in wet and muddy conditions according to long-term user feedback. The 2-year warranty backing the product adds a layer of confidence for buyers who plan to push their machines hard. One shipping-related complaint appeared, but the product itself received consistent praise for fitment accuracy and structural integrity.
What works
- 12.9 grade studs offer maximum tensile strength in this category
- Complete 4-piece set for full vehicle installation
- 2-year warranty provides added assurance
What doesn’t
- Shipping delays reported by some buyers
- Not compatible with vehicles using SAE thread studs
4. Rough Country 1.5 Inch Wheel Spacers for Can-Am Defender 4×137
Rough Country is a well-established name in the off-road suspension and accessory space, and their 1.5-inch wheel spacers for Can-Am Defender models reflect that engineering pedigree. These spacers are machined from 6061 aluminum and designed specifically for vehicles with HD5, HD7, HD8, HD9, and HD10 axles running a 4x137mm bolt pattern. The vehicle-specific design means no guesswork on hub bore compatibility or stud length.
Owner feedback from 2024 Can-Am Defender LTD HD10 installations confirms that these spacers even out the front and rear track width when paired with aftermarket wheels and tires. One owner reported over 1,000 miles of mixed trail and road use with zero loosening or vibration issues. The 1.5-inch thickness per side provides a meaningful stability improvement without requiring suspension modifications or creating excessive scrub radius.
The limited lifetime warranty is a significant advantage over generic imported spacers. It signals confidence in the material and manufacturing process. Installation is straightforward with basic tools, and the machined finish resists corrosion well in wet operating conditions. Availability is limited to Can-Am models with the specific axle specs listed, so confirming your vehicle’s axle designation before purchase is essential.
What works
- Vehicle-specific design eliminates fitment guesswork
- Limited lifetime warranty from a trusted off-road brand
- Proven long-term reliability beyond 1,000 trail miles
What doesn’t
- Only fits Can-Am models with specific axle designations
- 1.5-inch width may not suit all wheel offset combinations
5. KAX 4×137 ATV Wheel Spacers 1.5 Inch with M10x1.25 Studs
KAX offers a 1.5-inch 4×137 spacer set that targets Kawasaki and Can-Am applications with a 110mm hub bore and M10x1.25 threaded studs. The forging process uses 6061-T6 aluminum, and the studs are SGS-certified 10.9 grade for verified tensile strength. Compatibility extends across Kawasaki Bayou, Prairie, Brute Force, and Mule models as well as Can-Am Commander variants from 2011 onward.
User reports from Polaris Ranger 800 installations (using an adapted fitment) indicate that these spacers installed without steering wheel vibration — a common complaint with lower-quality spacers that lack precise centering. The 10.9 grade studs provide a strong clamping force, and the split nut hardware allows for secure installation without special tools. Multiple owners noted the lightweight feel compared to steel alternatives.
The instruction manual includes clear torque specifications and a reminder to check fitment clearance before final tightening. One reviewer who used these on a heavy Ford F-350 dually noted they were not hub-centric for that application, but for ATV and UTV use with the correct hub bore, the centering is accurate. The 1.5-inch width delivers a visible stance improvement without pushing tires past the fender edge on most stock machines.
What works
- SGS-certified 10.9 grade studs with verified strength ratings
- Lightweight 6061-T6 forging reduces unsprung mass
- Vibration-free installation reported across multiple platforms
What doesn’t
- Not a true hub-centric fit for all wheel types
- Compatibility list requires careful cross-referencing
6. ATV Engineering 4pc ATV Wheel Spacers 2 Inch (1 Inch Per Side) 4×110
ATV Engineering provides a complete 4-piece set of 1-inch per side spacers in the 4×110 bolt pattern, making this an attractive option for owners who want to space all four wheels rather than just the rear. The aerospace-grade aluminum construction and CNC machined polished finish provide corrosion resistance and a clean look behind aftermarket wheels. The 83.97mm hub bore fits Honda and Yamaha models with the 4×110 pattern and large center hubs.
Owner feedback from Honda TRX250X and Kawasaki Brute Force installations highlights the significant stability improvement these spacers deliver. The 1-inch thickness is conservative enough to avoid excessive bearing wear while still widening the track enough to reduce tip-over tendency in off-camber situations. The M10-1.25 thread pitch matches stock Honda and Yamaha stud specifications for a direct bolt-on installation.
The 4-pack format eliminates the need to purchase a second set for the front axle, which simplifies ordering and ensures consistent spacing across all four corners. Some users noted that the internal socket clearance holes are slightly small, requiring a thin-wall socket for installation. Overall build quality reviews are consistently positive, with multiple owners describing the spacers as well-made and durable after extended trail use.
What works
- Complete 4-piece set spaces all four wheels consistently
- Aerospace-grade aluminum with polished corrosion-resistant finish
- Direct-fit compatibility with Honda and Yamaha 4×110 models
What doesn’t
- Socket clearance holes may require a thin-wall socket
- 1-inch thickness offers modest stance improvement
7. GAsupply ATV Wheel Spacers 4×110 1.5 Inch with M12x1.25 Studs
GAsupply offers a 1.5-inch 4×110 spacer that stands out for its M12x1.25 stud sizing — a less common thread pitch that matches certain CFMoto, Segway, and specific Honda models. The 6061-T6 aluminum billet construction and pre-installed 12.9 grade bolts provide strength that exceeds most spacers in this price tier. The anodized surface treatment adds weather resistance for riders who operate in wet or muddy conditions year-round.
Owner reports from Honda Rancher and CFMoto Cforce 600 installations confirm that these spacers solve brake drum clearance issues while pushing the wheels to the fender edge for a more aggressive stance. One detailed installation review noted that the factory studs on the CFMoto were short enough to allow 3/4-inch nut engagement, which meets the recommended minimum thread contact. The reviewer recommended red Loctite on the ATV-side threads and a torque setting between 52 and 59 ft-lbs.
The 1.5-inch thickness provides a noticeable stability improvement at higher speeds, and multiple owners reported that the spacers eliminated wobble and improved cornering confidence. One 2016 Honda Pioneer 500 owner noted improved side-to-side stability but mentioned that the socket clearance holes required modification to fit a standard socket. This is a common compromise with thick spacers and should be factored into the installation plan.
What works
- M12x1.25 studs fit CFMoto and other less common applications
- 12.9 grade bolts provide maximum clamping strength
- Solves brake clearance issues on Honda Rancher models
What doesn’t
- Socket holes may need modification for standard tools
- Thicker than ideal for vehicles with limited fender clearance
8. FLYCLE 2 Inch 4×156 Wheel Spacers with 3/8-24 Studs (4-Pack)
This FLYCLE 4-piece set targets Polaris models that use the SAE 3/8-24 thread pitch rather than the more common M12x1.5 metric thread. The 2-inch thickness provides a substantial track width increase, and the 6061-T6 aluminum forgings with CNC processing ensure consistent flatness and concentricity. The 12.9 grade studs are heat-treated and surface-anodized for corrosion resistance in harsh trail environments.
The 131mm hub bore matches factory Polaris Sportsman, Ranger, and RZR specifications. Owner feedback from 2014 Polaris RZR XP 1000 installations confirms that the spacers fit without modification and provided immediate stability improvement in dune and trail riding. The included thread locker and user manual add value for first-time spacer installers who want guidance on proper torque sequences and re-torque intervals.
One important note is that these spacers are specifically designed for vehicles with 3/8-24 studs and will not fit models equipped with M12x1.5 threads. Buyers must verify their vehicle’s stud thread pitch before ordering. The 2-inch width pushes wheels out significantly, which may cause tires to protrude beyond the factory fenders on some models — checking clearance before installation is essential to avoid rubbing issues during suspension compression.
What works
- SAE 3/8-24 thread pitch fits specific Polaris models correctly
- 12.9 grade studs with heat treatment for long-term durability
- Complete 4-pack with thread locker and instructions included
What doesn’t
- Only compatible with 3/8-24 studs, not metric threads
- 2-inch thickness may exceed fender clearance on some machines
9. PHILTOP 4×110 Wheel Spacer 2 Inch with M10x1.25 Studs
PHILTOP brings a 2-inch 4×110 spacer to the market with a focus on anodized surface protection and 12.9 grade hardware. The 74mm hub bore fits a narrower range of vehicles — primarily Suzuki KingQuad, Honda TRX300/FourTrax, and Yamaha Big Bear models. The 6061-T6 aluminum forging and CNC machining ensure dimensional accuracy, and the pre-installed heat-treated studs are rated at 12.9 grade for high tensile strength.
Owner feedback highlights the aggressive stance improvement these spacers provide. Users reported that the anodized black finish looks clean behind aftermarket wheels and resists scratching during installation. The 2-inch thickness delivers a substantial track width increase that improves stability on side slopes and in deep ruts. Several owners noted that the spacers fit perfectly on their Honda and Suzuki models with no vibration or fitment issues.
The compatibility list includes a wide range of Suzuki and Honda models from the late 1980s through the 2000s, making this a good option for owners of older machines who want to modernize the stance and improve stability. One important caveat: if the factory wheel studs protrude beyond the spacer thickness, they must be trimmed to avoid interference with the wheel mounting surface. Measuring stud length before installation is critical.
What works
- 12.9 grade heat-treated studs offer excellent tensile strength
- Anodized black finish for corrosion and scratch resistance
- Fits older Honda and Suzuki models with 74mm hub bore
What doesn’t
- Limited compatibility with smaller hub bore vehicles
- Factory stud trimming may be required for proper fitment
10. YHTAUTO 4x110mm ATV Wheel Spacers 2 Inch with M10x1.25 Studs
YHTAUTO delivers a budget-friendly 2-inch 4×110 spacer set that covers a broad compatibility range including Honda, Suzuki, Can-Am, Kawasaki, and Yamaha models. The alloy steel construction with 12.9 grade studs provides strength that exceeds the price point suggests. The 74mm center bore fits many popular utility ATVs, and the M10x1.25 thread pitch matches standard Japanese ATV specifications.
Owner feedback indicates solid fitment across multiple platforms. One reviewer confirmed a perfect fit on a 2002-2007 Suzuki Eiger 400, while another noted that the red anodized spacers added a visual accent visible through the wheel spokes. The included high-strength thread locker simplifies installation and reduces the risk of fasteners loosening over time. The recommended torque range of 45-55 ft-lbs is clearly stated in the documentation.
The lug-centric design means the spacer centers on the lug studs rather than the hub bore. This is common at this price point and works well when installed correctly with proper torque. Some owners may prefer a hub-centric design for maximum vibration prevention, but user reports generally indicate smooth operation when the spacers are torqued to specification and re-torqued after the initial break-in period. The value proposition for riders on a tight budget is strong.
What works
- 12.9 grade studs at a budget-friendly price point
- Included thread locker simplifies safe installation
- Broad compatibility across major Japanese ATV brands
What doesn’t
- Lug-centric design less precise than hub-centric alternatives
- Alloy steel construction heavier than aluminum spacers
11. ATV Engineering 2pc ATV Wheel Spacers 2 Inch (1 Inch Per Side) 4×110
ATV Engineering’s 2-piece spacer set offers an entry point for riders who only need to space the rear axle or want to test the benefits of a wider stance before committing to a full 4-piece set. The 1-inch per side thickness in a 4×110 pattern with 83.97mm hub bore fits Honda TRX250, Rancher, and Foreman models, along with Yamaha Grizzly, Rhino, and Kodiak machines. The aerospace-grade aluminum construction provides corrosion resistance and light weight.
Owner reports from 2014 TRX250X installations confirm a dramatic improvement in quad stability after installation. The 1-inch thickness is relatively conservative but still provides enough track width increase to reduce the tippy feeling in turns and off-camber sections. The CNC machined polished aluminum finish looks professional and holds up well against mud and water exposure. Installation is straightforward with basic hand tools.
The M10-1.25 thread pitch matches stock Honda and Yamaha specifications, and the 83.97mm hub bore provides a hub-centric fit on compatible vehicles. Some users noted that the internal socket clearance holes are tight — an impact socket may not fit, requiring a standard thin-wall socket instead. For riders looking for an affordable way to improve stability on a rear-heavy utility quad or sport machine, this 2-pack delivers measurable results without unnecessary complexity.
What works
- Affordable entry point for testing spacer benefits
- Hub-centric 83.97mm bore for precise fitment
- Aerospace-grade aluminum resists corrosion and saves weight
What doesn’t
- Only includes 2 spacers for rear axle use
- Socket clearance holes tight for impact tools
Hardware & Specs Guide
Bolt Pattern and Hub Bore
The bolt pattern — such as 4×110, 4×137, or 4×156 — must match both the vehicle hub and the wheel exactly. The first number indicates the number of lugs, and the second is the diameter in millimeters of the circle they form. Hub bore is the center hole diameter that fits over the vehicle’s hub lip. A hub-centric spacer uses this bore to center itself, reducing vibration and stress on the studs. Measure your vehicle’s hub lip diameter with a caliper before ordering to ensure the spacer’s bore accommodates it.
Stud Grade and Material
Studs are rated by grade — 10.9 and 12.9 are the most common for ATV spacers. Grade 12.9 offers approximately 20% higher tensile strength than 10.9, making it the preferred choice for heavy-duty or performance applications. The spacer body itself should be machined from 6061-T6 aluminum alloy, which offers a high strength-to-weight ratio and excellent corrosion resistance when anodized. Avoid spacers made from cast aluminum or unspecified alloys, as these may lack the structural integrity for off-road loads.
Torque Specifications and Re-Torque Intervals
Proper torque is critical for spacer safety. Most ATV spacers recommend 45-55 ft-lbs for M10x1.25 studs and 70-80 ft-lbs for M12x1.5 or 3/8-24 studs. After the first 25-50 miles, all hardware must be re-torqued to account for settling and thermal cycling. Use a calibrated torque wrench and apply thread locker to the studs that bolt to the vehicle hub. Never impact-wrench the lug nuts onto the spacer studs — always use a torque wrench for final tightening.
Thickness and Clearance Planning
Spacer thickness is measured per side. A 1-inch spacer pushes each wheel outward by 1 inch, increasing total track width by 2 inches. Before purchasing, measure the gap between your tire sidewall and the nearest suspension or frame component at full compression. Leave at least 1 inch of clearance to prevent rubbing. Also verify that your factory wheel studs do not protrude beyond the spacer mounting face — if they do, the studs must be trimmed or a thicker spacer selected.
FAQ
Are ATV wheel spacers safe to install on my machine?
Will wheel spacers cause premature bearing wear?
How do I know which bolt pattern my ATV has?
Can I use spacers on both the front and rear axles?
Do I need to trim my factory wheel studs to install spacers?
Final Thoughts: The Verdict
For most buyers, the best atv wheel spacers winner is the RockTrix 2 Inch 4×137 Set because it balances aerospace-grade materials, precise CNC machining, and strong 10.9 grade studs at a competitive price point that works across Kawasaki, Can-Am, and Bombardier platforms. If you want maximum stud strength and a performance-oriented build, grab the FLYCLE 1.5 Inch 4×156 4-Pack with 12.9 grade hardware. And for a budget-conscious entry into rear-only spacing on Honda or Yamaha 4×110 machines, nothing beats the value of the ATV Engineering 2-Piece 4×110 Set.
Certification: BSc in Mechanical Engineering
Education: Mechanical engineer
Lives In: 539 W Commerce St, Dallas, TX 75208, USA
Md Amir is an auto mechanic student and writer with over half a decade of experience in the automotive field. He has worked with top automotive brands such as Lexus, Quantum, and also owns two automotive blogs autocarneed.com and taxiwiz.com.