The Spitfire Formula Four 97 Una Trinity Conical Full Wheels pair Spitfire's 97 duro urethane with the Conical Full shape, available in black 54mm and natural 52mm. The 97A formula sits between soft cruisers and hard park wheels, rolling smoother over rough spots while staying fast and slide-friendly. The Conical Full shape gives you a wide, grippy contact patch for locking into grinds and carving transition.
Why Skaters Choose the Spitfire F4 97 Una Trinity
- 97 duro Formula Four: A versatile in-between hardness that handles rough street spots and still slides predictably at the skatepark.
- Conical Full shape: A true performance conical shape with a full riding surface, built for quick response, stability, and locking into grinds.
- Formula Four urethane: Spitfire's premium formula, known for flat spot resistance, controllable grip, lasting speed, and holding its size and shape longer.
- Two sizes, two colorways: Choose a natural 52mm for a light, quick setup built for technical street skating, or a black 54mm for a versatile all-around size.
Specifications
| Brand | Spitfire Wheels |
| Model | Una Trinity |
| Formula | Formula Four (F4) |
| Durometer | 97A |
| Shape | Conical Full |
| Sizes & Colors | 52mm Natural, 54mm Black |
| Item Numbers | 21110415UN52 (52mm Natural), 21110415UN54 (54mm Black) |
| Quantity | Set of 4 wheels |
Which Size Should I Choose?
52mm wheels are smaller and lighter, keeping your board low and quick for flip tricks, ledges, and technical street skating. 54mm is a bit more versatile, holding speed better at the skatepark and rolling more easily over cracks and rough ground.
Frequently Asked Questions
What does 97A durometer mean for skateboard wheels?
97A is slightly softer than the 99A and 101A wheels common at skateparks. It gives a smoother, quieter ride on rough pavement while staying fast and still sliding well, which makes it a good all-terrain choice.
What is the Spitfire Conical Full shape?
The Conical Full has a conical side profile with a full, wide riding surface. It's designed for quick response and stability, and it helps your wheels lock into grinds.
Should I get 52mm or 54mm wheels?
Go with 52mm if you mostly skate street and want a lighter, more responsive setup. Go with 54mm if you split time between street and park or skate rougher ground.
How many wheels come in a set?
Each purchase includes a set of 4 wheels. Bearings are sold separately.