Spitfire vs Bones Wheels: A Side-by-Side Look (2026)
Spitfire and Bones are two of the most popular skateboard wheel brands. Here's how their main lines compare and how to choose.
The Quick Answer
Both brands make popular, well-regarded wheels. Spitfire's Formula Four line and Bones' STF (Street Tech Formula) and SPF (Skatepark Formula) lines are among the most common choices. Instead of picking a "winner," choose by skating style, size, shape and hardness.
Main Lines Compared
| Line | Aimed At | Notes |
|---|---|---|
| Spitfire Formula Four | Street and park | Premium urethane, several shapes and hardnesses |
| Spitfire Classics | All-round | Spitfire's standard line |
| Bones STF | Street | Street Tech Formula, multiple shapes (V-numbers) |
| Bones SPF | Parks and bowls | Skatepark Formula |
Hardnesses and shapes vary by product; check the listing for exact specs.
Each Brand's Lineup in More Detail
| Line | Hardness | Aimed At |
|---|---|---|
| Spitfire Formula Four | Offered in 99 and 101 durometer | Street and park, many shapes |
| Spitfire Classics | 99 | All-round street and park |
| Spitfire OG Classics | 99 | Cutaway shape with a wider contact patch |
| Spitfire Chargers | Soft (around 80A) | Cruising and rough ground |
| Bones STF | Hard (typically 99A–103A) | Street; several shapes |
| Bones SPF | 81B and 84B (about 101A–104A) | Parks, bowls and pools |
| Bones ATF "Rough Riders" | Soft (around 80A) | Rough terrain and cruising |
Hardness figures are as commonly listed by retailers and reviewers; check the exact wheel listing, since specs change between models.
A Note on Durometer Scales
Most wheels are rated on the A scale, where higher numbers are harder. Very hard wheels are sometimes rated on the B scale, which reads about 20 points lower than A for the same hardness. That's why Bones SPF wheels at 84B are among the hardest wheels you can buy.
Shapes
Both brands offer similar shape families: classic (rounded edges), conical (angled sidewall that locks into grinds), slim (narrow and light for flip tricks), wide (stable for transition) and lock-in shapes. Both also market their premium urethanes as resistant to flat spots.
How to Choose
- Size: smaller wheels for technical street; bigger for parks and speed. See the wheel size guide.
- Hardness: harder wheels slide and grind more easily on smooth surfaces; softer wheels grip and handle rough ground. See hard vs soft wheels.
- Shape: narrow wheels are lighter for flip tricks; wider wheels are more stable and lock into grinds.
Picks
Spitfire Formula Four Classic Wheels
Spitfire's Formula Four urethane in the Classic shape. Check sizes on the listing.
Check Price on AmazonCare
Rotate wheels to avoid uneven wear. See how to clean skateboard wheels.
More: best skateboard wheels, bearings and wheel bite.
Frequently Asked Questions
Are Spitfire or Bones wheels better?
Both are respected by skaters. The best choice depends on the line, size, shape and hardness you want.
What is Spitfire Formula Four?
Spitfire's premium urethane line, offered in several shapes and hardnesses.
What do STF and SPF stand for?
Bones STF is Street Tech Formula, aimed at street skating. SPF is Skatepark Formula, aimed at park and bowl skating.
Which is better for street?
Spitfire Formula Four and Bones STF are both popular for street.
Which is better for parks and bowls?
Bones SPF is designed for parks; Spitfire Formula Four in larger sizes is also a common park pick.