OJ Wheels Dirt Tires Thunder Juice Black 70mm 78A – Skate Wheels x4

OJ Dirt Tires 70mm 78A: All-Terrain Traction and Smooth Rolling

Designed to venture beyond perfectly smooth concrete, the OJ Dirt Tires combine an oversized diameter, soft urethane and a distinctive treaded surface. This formula focuses on grip, comfort and confident rolling when terrain becomes less predictable.

The Thunder Juice design pairs black urethane with an orange core and bold automotive-inspired graphics, giving the wheel a distinctive look while retaining the unmistakable identity of OJ Wheels.

70mm Diameter for Rougher Surfaces

The large 70mm diameter helps the wheel roll across small cracks, imperfections and uneven pavement more easily than a smaller skateboard wheel.

Oversized wheels also maintain momentum effectively once up to speed, making this format particularly attractive for riders focused on cruising, transportation and comfortable rolling.

Soft 78A Durometer

A 78A hardness places this model firmly within the soft-wheel category. The urethane is able to absorb more vibration from coarse surfaces than the harder compounds commonly associated with technical park skating.

This softer formula also increases grip, creating a more comfortable and planted ride when pavement quality deteriorates.

Engraved Treads for Extra Traction

The most distinctive feature is the treaded running surface. Instead of using a completely smooth contact area, the wheel incorporates engraved grooves designed to provide additional traction.

OJ describes the Dirt Tires as an all-weather high-performance wheel developed to increase grip in both wet and dry conditions.

This tread pattern gives the model a noticeably different character from a conventional street wheel and reinforces its focus on variable terrain.

41mm Width and 25.8mm Contact Patch

Overall width measures 41mm, while the road surface provides a 25.8mm contact patch. These proportions complement the oversized diameter and soft urethane formula with a stable footprint.

The resulting profile prioritizes traction and ride comfort rather than the sharp, firm response associated with small hard wheels.

Built for Changing Terrain

The combination of 70mm sizing, 78A urethane and an engraved tread makes this setup particularly relevant for riders dealing with less-than-perfect pavement.

It can be an excellent choice for cruising, transportation and setups intended to handle a broader variety of surfaces while maintaining authentic skateboard wheel construction.

Because of the large diameter, setup clearance should be checked before installation. Depending on truck height and deck configuration, riser pads may be useful to increase wheel clearance and reduce the possibility of wheelbite.

Thunder Juice Black Design

This version features a black wheel with an orange core, complemented by bold yellow and orange Dirt Tires graphics inspired by automotive tire styling.

The sculpted tread reinforces this visual theme while serving a functional purpose by increasing traction across changing surface conditions.

Technical Specifications

• Brand: OJ Wheels
• Model: Dirt Tires Thunder Juice
• Type: skateboard wheels
• Quantity: set of 4
• Diameter: 70mm
• Durometer: 78A
• Wheel width: 41mm
• Contact patch: 25.8mm
• Surface: engraved tread
• Color: black with orange core
• Use: variable terrain, cruising and wet or dry surfaces

Why Choose 70mm 78A Skateboard Wheels?

This specification is aimed at riders who prioritize ride comfort, grip and the ability to handle surface imperfections. The large diameter improves rollover while soft urethane helps reduce vibration through the board.

The tread pattern adds an unusual technical feature compared with traditional smooth skate wheels, making the Dirt Tires an interesting option for a setup intended to explore rougher and more varied terrain.