Wheel durometer measures the hardness of a wheel’s urethane, directly affecting grip, speed, and slide control. Understanding this scale is the complete guide to choosing the right wheels for your skating style.
This article reveals expert tips on reading durometer charts and selecting the perfect hardness. Master these proven methods to transform your ride quality and performance today.
Best Skateboard Wheels for Street Skating – Detailed Comparison
Bones STF V5 Sidecut – Best Overall Choice
The Bones STF V5 Sidecut (99A) delivers unmatched durability and a smooth slide on rough asphalt. This is the best option for technical street skaters who need consistent grip for flip tricks and reliable breakaway for powerslides.
Spitfire Formula Four 99D Classic – Best for Park Skating
The Spitfire Formula Four 99D Classic offers a proprietary urethane formula that resists flat-spotting better than any competitor. Ideal for coping slides and high-impact landings, this wheel provides exceptional rebound and longevity.
OJ Super Juice 60mm 78a – Best for Cruising
The OJ Super Juice 60mm 78a is recommended for rough pavement and long commutes. Its soft durometer absorbs vibrations effortlessly, providing a smooth, fast ride. This is the ideal choice for skaters prioritizing comfort over technical tricks.
Understanding the Durometer Scale and How It Affects Your Ride
The durometer scale measures urethane hardness using a standardized “A” rating. Lower numbers (78A-87A) indicate softer wheels, while higher numbers (99A-101A) mean harder wheels. This single number dictates how your board feels on every surface.
Soft Wheels (78A-87A): Maximum Grip and Comfort
Soft wheels excel at absorbing vibrations from rough pavement and cracks. They provide superior traction, making them ideal for cruising, longboarding, and commuting. The trade-off is lower speed and faster wear on smooth surfaces.
- Best for: Rough roads, long distances, and quiet rides
- Drawback: Slower acceleration and reduced slide control
Medium Wheels (88A-97A): The Versatile Middle Ground
Medium durometer wheels offer a balanced blend of grip and slide for park skating. They handle coping tricks well without being too sticky or too slippery. This range is a popular choice for all-around skateboarders.
- Best for: Skateparks, ramps, and general street skating
- Benefit: Predictable slides and good shock absorption
Hard Wheels (98A-101A): Speed and Slide Performance
Hard wheels are engineered for technical street skating and vert ramps. They offer maximum speed on smooth concrete and a predictable, controlled slide. However, they transmit every bump directly to your feet.
- Best for: Smooth skateparks, ledges, and flip tricks
- Drawback: Harsh ride on rough surfaces and high flat-spot risk
How to Choose the Right Wheel Durometer for Your Skating Style
Matching durometer to your primary terrain is the most critical decision for performance. A common mistake is buying wheels based on brand alone without considering the surface you skate daily. Use this guide to match hardness to your specific needs.
Street Skating: Precision and Slide Control
Street skaters need a wheel that slides on command but grips for flip tricks. A 99A to 101A durometer is the standard choice for ledges, rails, and flat ground. Brands like Bones STF and Spitfire Formula Four are engineered specifically for this demanding environment.
- Best range: 99A-101A for technical tricks
- Key trait: Predictable breakaway and flat-spot resistance
Park and Vert Skating: Speed and Rebound
Skateparks feature smooth concrete and transitions requiring high speed. A 97A to 99A durometer offers the perfect balance of grip for carving and slide for coping tricks. Softer wheels here will feel sluggish and slow you down on ramps.
- Best range: 97A-99A for bowls and halfpipes
- Key trait: High rebound for pumping and maintaining speed
Cruising and Longboarding: Comfort and Grip
For rough streets and long commutes, prioritize vibration absorption over slide performance. A 78A to 87A durometer will smooth out cracks and pebbles effortlessly. This range sacrifices speed for unmatched comfort and traction.
- Best range: 78A-87A for pavement and distance
- Key trait: Maximum shock absorption and quiet rolling
Common Durometer Myths and Misconceptions Debunked
Many skaters believe a higher durometer always means a faster wheel. In reality, wheel speed depends on urethane formula, core design, and surface texture, not just hardness. Let’s clear up the most common misunderstandings about durometer ratings.
Myth: Harder Wheels Are Always Faster
Hard wheels only feel faster on perfectly smooth skatepark concrete. On rough asphalt, they vibrate excessively, causing energy loss and slower rolling. A soft wheel actually maintains speed better on cracked pavement by absorbing impacts.
- The truth: Surface condition dictates which durometer is fastest
- Example: A 78A wheel rolls faster than a 101A wheel on a gravel path
Myth: Softer Wheels Wear Out Faster
While soft urethane wears quicker on smooth surfaces, hard wheels can chip and flat-spot faster on rough terrain. Durability is more about urethane quality and riding style than durometer alone. Premium formulas like Spitfire Formula Four resist wear regardless of hardness.
- The truth: Riding surface and brand matter more than the number
- Tip: Rotate your wheels regularly to extend lifespan
Myth: You Need Different Wheels for Every Surface
Many skaters successfully use one wheel durometer for multiple terrains by adjusting technique. A 97A durometer handles skateparks, street spots, and rough pavement with acceptable performance. Experimenting with one versatile set saves money and builds skill.
- The truth: One mid-range wheel covers 80% of skating scenarios
- Recommendation: Start with 97A and adjust based on your local spots
How to Read Durometer Numbers on Wheels and Charts
Manufacturers often use different scales like “A,” “B,” or “D” to rate hardness, which causes confusion. Most skateboard wheels use the Shore A scale, but some premium brands use the “D” scale for harder formulas. Understanding these differences prevents costly purchasing mistakes.
Decoding the Shore A Scale: 78A to 101A
The Shore A scale runs from 0 (softest) to 100 (hardest), but skate wheels typically range from 78A to 101A. A jump of just 2 points (like 99A to 101A) creates a noticeable difference in grip and slide feel. Always compare wheels from the same brand for accurate results.
- 78A-87A: Soft, grippy, ideal for cruising and rough roads
- 88A-97A: Medium, versatile, good for park and street
- 98A-101A: Hard, fast, designed for smooth surfaces and slides
The “D” Scale and Why It Matters
Some brands, like Spitfire with their Formula Four 99D, use the Shore D scale. A 99D is significantly harder than a 99A because the D scale measures higher durometer materials. Do not compare A and D numbers directly; a 99D is roughly equivalent to a 101A.
- Key rule: D scale numbers are always harder than A scale numbers
- Tip: Check the manufacturer’s conversion chart before buying
Using a Durometer Chart for Quick Reference
A durometer chart helps you visualize where your wheel falls on the hardness spectrum. Print one out or save it to your phone for shopping trips. This simple tool ensures you pick the right wheel for your specific skating style every time.
| Durometer | Skating Style | Surface |
|---|---|---|
| 78A-87A | Cruising, Longboarding | Rough pavement |
| 88A-97A | Park, Ramp, All-Around | Smooth concrete |
| 98A-101A | Street, Vert, Technical | Skateparks, ledges |
Wheel Diameter vs. Durometer: How They Work Together
Many skaters focus solely on durometer and ignore wheel diameter, but both factors determine your ride quality. Diameter affects acceleration and top speed, while durometer controls grip and slide. Combining them correctly unlocks your board’s full potential.
Small Wheels (50mm-54mm): Technical Control
Small wheels accelerate quickly and make flip tricks easier due to lower rotational weight. They pair best with hard durometers (99A-101A) for technical street skating. The trade-off is slower top speed and a rougher ride on cracks.
- Best setup: 52mm 101A for flip tricks and ledges
- Drawback: Poor performance on rough pavement
Medium Wheels (55mm-58mm): Balanced Versatility
Medium wheels offer a compromise between speed and control for park skating. They work well with medium durometers (97A-99A) for ramps and bowls. This combination provides enough speed for transitions while maintaining slide control.
- Best setup: 56mm 99A for skatepark all-rounders
- Benefit: Smooth rolling over small cracks and pebbles
Large Wheels (59mm-65mm): Speed and Stability
Large wheels maintain momentum longer and roll over debris effortlessly. They pair best with soft durometers (78A-87A) for cruising and longboarding. This combination delivers a fast, comfortable ride over long distances.
- Best setup: 60mm 78A for commuting and rough roads
- Drawback: Slower acceleration and heavier feel
Quick Reference Table for Wheel Size and Durometer
| Diameter | Best Durometer | Skating Style |
|---|---|---|
| 50-54mm | 99A-101A | Technical street |
| 55-58mm | 97A-99A | Park and ramp |
| 59-65mm | 78A-87A | Cruising and longboard |
How Urethane Formula Affects Durometer Performance
Not all 99A wheels feel the same because urethane formula quality varies dramatically between brands. Premium urethane blends offer better rebound, flat-spot resistance, and consistent slide characteristics. Cheap wheels at the same durometer often feel dead and wear unevenly.
The Role of Rebound in Wheel Performance
Rebound measures how quickly urethane returns to its original shape after compression. A high-rebound 99A wheel feels faster and more responsive than a low-rebound wheel of the same durometer. Spitfire Formula Four and Bones STF are famous for their exceptional rebound properties.
- High rebound: Better speed, pop, and energy return
- Low rebound: Sluggish feel, poor slide control
Flat-Spot Resistance and Urethane Quality
Hard wheels are prone to flat spots from hard slides or rough landings. Premium urethane formulas use proprietary additives that resist deformation under extreme heat and pressure. This allows skaters to slide harder without ruining their wheels.
- Key factor: Molecular structure of the urethane blend
- Tip: Invest in known brands to avoid premature flat spots
Why Brand Matters More Than the Durometer Number
A cheap 101A wheel may perform like a 95A from a premium brand due to poor urethane quality. Stick with established manufacturers like Bones, Spitfire, OJ, and Ricta for consistent performance. Reading reviews and testing wheels from trusted sources saves money in the long run.
| Brand | Notable Tech | Best Durometer Range |
|---|---|---|
| Bones | STF (Street Tech Formula) | 99A-101A |
| Spitfire | Formula Four | 97A-99D |
| OJ | Super Juice | 78A-87A |
Step-by-Step Guide to Testing Wheel Durometer Before Buying
You cannot always test wheels before purchasing, especially when ordering online. However, you can use proven methods to gauge durometer feel without riding them. These simple tests help you avoid buying wheels that feel too hard or too soft.
The Fingernail Test for Quick Hardness Check
Press your fingernail firmly into the wheel’s urethane surface. A soft wheel (78A-87A) will leave a visible indentation that slowly disappears. A hard wheel (99A-101A) will resist your nail completely with no mark left behind.
- Soft (78A-87A): Fingernail leaves a deep, slow-to-recover dent
- Medium (88A-97A): Fingernail leaves a shallow, quick-to-recover mark
- Hard (98A-101A): Fingernail leaves no visible indentation
The Drop Test for Rebound and Feel
Drop the wheel from shoulder height onto a hard, flat surface like concrete. A high-rebound wheel will bounce back energetically, often reaching half the drop height. A low-rebound wheel will thud and barely lift off the ground.
- High bounce: Indicates quality urethane and good rebound
- Low thud: Suggests dead urethane and poor performance
Reading Online Reviews for Real-World Feedback
Manufacturer descriptions often exaggerate durometer accuracy. Focus on skater reviews that mention specific surfaces and skating styles. Look for comments about slide feel, flat-spot resistance, and wear patterns from experienced riders.
| Review Element | What to Look For | Red Flag |
|---|---|---|
| Slide feel | Predictable, consistent breakaway | Choppy or unpredictable slides |
| Flat spots | No flat spots after hard slides | Flat spots after first session |
| Wear rate | Even wear after months of use | Uneven or rapid wear |
Conclusion: Mastering Wheel Durometer for Better Skating
Understanding wheel durometer transforms how your board feels on every surface. You now know how to match hardness to your skating style, read durometer scales, and avoid common myths.
Start by identifying your primary terrain and choosing a durometer that fits. Experiment with one new set of wheels to feel the difference firsthand.
Apply these tips on your next ride and experience the perfect balance of grip, speed, and slide control.
Frequently Asked Questions about Wheel Durometer
What does wheel durometer actually mean?
Wheel durometer measures the hardness of a skateboard wheel’s urethane using the Shore A scale. This number dictates how the wheel grips, slides, and absorbs shock on different surfaces.
A lower number (78A) means a softer, grippier wheel, while a higher number (101A) means a harder, faster wheel. The scale helps skaters choose wheels for their specific terrain and style.
What durometer is best for street skating?
For technical street skating, a durometer between 99A and 101A is the standard choice. These hard wheels provide predictable slides for ledges and rails while maintaining enough grip for flip tricks.
Brands like Bones STF and Spitfire Formula Four are specifically engineered for this demanding environment. Their urethane formulas resist flat-spotting and offer consistent breakaway performance.
What durometer is best for cruising and longboarding?
Cruising and longboarding require soft wheels between 78A and 87A for maximum comfort. These wheels absorb vibrations from rough pavement, cracks, and pebbles, providing a smooth ride over long distances.
Popular choices include OJ Super Juice and Ricta Clouds in 78A. The trade-off is slower acceleration and reduced slide control compared to harder wheels.
Is a higher durometer wheel always faster?
No, a higher durometer is not always faster. Hard wheels only feel fast on perfectly smooth skatepark concrete because they transmit all energy directly into forward motion.
On rough asphalt, hard wheels vibrate excessively, causing energy loss and slower rolling. A soft wheel actually maintains speed better on cracked pavement by absorbing impacts rather than bouncing.
How do I choose the right wheel durometer?
Start by identifying your primary skating surface and style. Street skaters need 99A-101A, park skaters benefit from 97A-99A, and cruisers should choose 78A-87A.
Consider wheel diameter alongside durometer for optimal performance. Small wheels pair with hard durometers, while large wheels work best with soft durometers for cruising.
What is the difference between Shore A and Shore D scales?
The Shore A scale measures softer materials like standard skateboard wheels, ranging from 0 to 100. The Shore D scale measures harder materials and is sometimes used by premium brands like Spitfire for their 99D Formula Four wheels.
A 99D is significantly harder than a 99A because the D scale starts where the A scale ends. Always check the manufacturer’s conversion chart before comparing wheels across different scales.
Can I use the same wheels for street and park skating?
Yes, a versatile durometer like 97A works well for both street and park skating. This mid-range hardness handles ledges, ramps, and rough pavement with acceptable performance.
Many skaters successfully use one wheel durometer for multiple terrains by adjusting their technique. Starting with 97A allows you to experiment before investing in specialized wheels.
Why do some 99A wheels feel different from others?
Urethane formula quality varies dramatically between brands, even at the same durometer rating. Premium wheels use proprietary blends that offer better rebound, flat-spot resistance, and consistent slide characteristics.
Cheap 99A wheels often feel dead and wear unevenly due to lower quality urethane. Stick with established manufacturers like Bones, Spitfire, and OJ for reliable performance.
How do I test wheel durometer without riding?
Use the fingernail test by pressing your nail into the urethane. Soft wheels leave a visible indentation, while hard wheels resist completely with no mark left behind.
The drop test also helps: drop the wheel from shoulder height onto concrete. A high-rebound wheel bounces energetically, while a low-rebound wheel thuds and barely lifts off the ground.