# Seismic - 70mm Urchin

## **\*\*DIFFERENT FORMULAS WITH DIFFERENT PRICES\*\***

**Specs:**  
Height: 70mm  
Durometers: 78a / 80a / 82a  
Formula:  
78a (Defcon)  
80a (Clear)  
82a (Elixir)  
Contact Patch: 44mm  
Hub Setting: Offset  
Edges: Round  

Sold in sets of FOUR wheels.  

_**Available in THREE proprietary formulas, with finely-tuned durometer choices.**  
_**Defcon**™: **Guinness WR speed** – g_et up to speed faster!_ • easy, predictable in-slide feedback • extremely slow, consistent wear  
_• 78A Mango (stoneground): _super fast roll; smooth and predictable in-slide feedback; defined yet easy release__  
**Premium Clear**™: the best beautiful clear urethane in the world_  
• 80A Crystal Clear Blue: Smooth-rolling, fast, and grippy when fresh; sugary smooth sliding when broken-in  
_**Elixir™**: smooth, predictable slides (even on concrete) • easy release and hookup • supreme control • bright ’thane lines_  
• 82A Red (stoneground): U_ltra smooth and buttery with bright ’thane lines__

An extremely versatile wheel, the 70mm by 44mm Urchins have enough grip to hold lines at speed, but easy breakout for big slides. Now with a bigger bevel on the inside edge, stoneground running surfaces, and expanded formula options, they’re BETTER THAN EVER for hucking standups into corners, and for slashing your way down a hill, across town, or through an alley.  
• height and width perfectly balanced for modern all-around riding  
• slide release that’s smooth, easy, comfortable, and predictable  
• amazing in-slide feedback and control, bleeding just the right amount of speed  
• secure, comfy hookup  
• vibrant ‘thane lanes  
• consistent wear

Molded around our advanced Mini-EC hub – preserves ample tire thickness while saving over ½-ounce per wheel, stiffening the inside edge, and super-charging inside edge rebound.  Translation: Better roll speed, more predictable handling, and better slide control!

## Details

- **Price:** 558.0 HKD - 678.0 HKD
- **Vendor:** Seismic
- **Type:** Wheels
- **Tags:** 70mm, 78a, 80a, 82a, Downhill wheels, Downhill/Freeride wheels, Freeride wheels, Round&Beveled, Seismic, Stone-grounded, Wheels

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 78a Defcon (Mango) | 678.00 HKD | In stock |
| 80a Clear (Blue) | 558.00 HKD | In stock |
| 82a Elixir (Red) | 558.00 HKD | In stock |

## Images

- Seismic - 70mm Urchin

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> Source: [SBDW Longboards Hong Kong](https://sbdwlongboards.com/products/seismic-70mm-urchin-78a-80a-82a)
> Updated: 2026-04-20