# Seismic - 83mm Tailwind

**Specs:**  
Height: 83mm  
Durometers: 76a, 79a  
Formula: Defcon  
Contact Patch: 50.5mm  
Hub Setting: Offset  
Edges: Radiused(Outside), Beveled(Inside)  
Weight: 9.25 oz. (Each)

Sold in sets of FOUR wheels.  

_**Set a new pace!**_  
• Ideal size and proportions for **max mileage** on LDP treks and **max velocity** in Top Speed pursuits.  
• Highly optimized for **rolling efficiency** without compromising traction, even through hard corners and strong pumps.  
• Surprisingly **quick** acceleration and **nimble** edge-to-edge response for its size. **Speed and momentum** to **beat the pack**.• **Finely-calibrated** width and stout, **highly-supported** lip profiles.  
• Bearing seat offset 6.5% for progressive lip engagement and more consistent wear.  
• Running surface features a **0.5mm concave** that pre-loads edges, sharpens grip, and enhances rebound.  
• Used to set the new **World Record for Fastest Standup Slide**. (Ambroise Trauet, 73.34 mph / 117.35 kph Toeside – June 23, 2022, in Sellraintal, Tirolean Alps, Austria – official Guinness certification expected in 2023.)

_**Poured in DEFCON™ ultra-high-rebound urethane**_  
• The **fastest formula** in the history of skateboard racing, bar none.  
• Credited with virtually every significant world distance and speed record, including the **official Guinness Standup mark**. (Pete Connolly, 91.17 mph / 146.73 kph – Sept. 16, 2017, at The Top Speed Challenge in Quebec, Canada.)  
• Defcon’s **superior energy efficiency** means not just higher speeds and longer push distances, but also _noticeably longer battery life and rolling range on your e-board!_ (If they aren’t already available, ask your favorite e-board brands to offer pulley adapters fitted to the Tailwind’s Fusion hub.)  
• _More miles per hour, distance per push, and blocks per watt!_ Predictable handling; slow, consistent wear.  
• Available in two finely-tuned durometers…  
_– 76A Mango:_ Fast, smooth, and lively underfoot. An optimal balance of properties for most surface conditions.  
_– 79A Mint:_ Ideal for smoother surfaces. Very fast roll with friendly slide characteristics. Excellent durability.

_**The Fusion™ core**_  
• Integrates 15 years of advanced hub R&D.  
• 46mm tall x 44mm wide – the largest and most supportive hub ever seen in a wheel this size.  
• Formed from 85D fiber-reinforced thermoplastic – the toughest hub material in the industry – with robust bearing lugs.  
• Deep, wide “saddle” profile regulates lateral wheel flex and supercharges edge support.  
• Eight (8) lateral support beams (hollowed-out for lightness and aesthetics) combine with saddle profile to create _unprecedented 3D mechanical lock_ with urethane.  
• Support beam contours form internal “turbine blade” structure that reflects and directs Defcon’s unparalleled energy return…  
– creates uniquely-efficient and perfectly-balanced _dynamic rolling rebound_  
– turbocharges roll and enhances e-board range

## Details

- **Price:** 938.0 HKD
- **Vendor:** Seismic
- **Type:** Wheels
- **Tags:** 76a, 79a, 83mm, Downhill wheels, Downhill/Freeride wheels, LDP wheels, Round&Beveled, Seismic, Ungrounded, Wheels

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 76a (Mango) | 938.00 HKD | In stock |
| 79a (Mint) | 938.00 HKD | In stock |

## Images

- Seismic - 83mm Tailwind
- Seismic - 83mm Tailwind
- Seismic - 83mm Tailwind
- Seismic - 83mm Tailwind

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> Source: [SBDW Longboards Hong Kong](https://sbdwlongboards.com/products/seismic-83mm-tailwind)
> Updated: 2026-04-20