Seismic Speed Vent 73mm 77a Defcon Wheels - Bubblegum (Set of 4)
Seismic Speed Vent 73mm 77a Defcon Wheels - Bubblegum (Set of 4)
Skate Setup Size Chart
Use this chart to match decks, trucks, and wheels. Preferences vary by style (street, park, transition). Beginners: wheels about 52–55 mm, duro around 101A.
Deck width
| Deck width | Height | Age | Shoe size |
|---|---|---|---|
| 7.0" & under | 4'4" or smaller | 8 yrs or younger | Kids 5 or smaller |
| 7.1"–7.45" | 4'5"–5'2" | 9–12 yrs | Mens 6–8 |
| 7.5" & up | 5'3" or taller | 13 yrs or older | Mens 9 or larger |
Deck width and riding style
| Deck width | Recommended riding style |
|---|---|
| 7.45" or less | All around riding for kids 14 yrs & under |
| 7.5"–8.0" | Street, technical tricks |
| 8.0"–8.25" | Pools, ramps, parks, & all-around |
| 8.25"+ | Vert, pools, cruising |
Wheel diameter
| Wheel diameter | Use |
|---|---|
| 49–52 mm | Technical street |
| 52–55 mm | All around, geared more toward street |
| 55–60 mm | All around, geared more toward transition |
| 60–65 mm | Transition |
| 65–70 mm | Some transition; many cruiser & longboard |
| 70 mm+ | Downhill longboard |
Trucks and deck (common brands)
| Brand | Truck size | Deck sizes |
|---|---|---|
| Independent | 129 | 7.4"–7.8" |
| Independent | 139 | 7.8"–8.2" |
| Independent | 149 | 8.375"–8.6" |
| Independent | 159 | 8.6"–9.0" |
| Thunder | 147 | 7.9"–8.2" |
| Thunder | 149 | 8.2"–8.4" |
| Thunder | 151 | 8.4"+ |
| Venture | 5.2 / 5.25 | 7.75"–8.25" |
| Venture | 5.8 | 8.25"–8.75" |
| Ace | 22 | 7.0"–7.75" |
| Ace | 33 | 7.75"–8.25" |
| Ace | 44 | 8.25"–8.75" |
| Krux | 8.0 | 7.75"–8.38" |
| Krux | 8.25 | 8.0"–8.5" |
| Tensor | 5.25 | 7.875"–8.175" |
| Tensor | 5.5 | 8.125"–8.375" |
Couldn't load pickup availability
Bow Shock Marketplace · since 2024
Sold by Skates USA on Bow Shock Marketplace —partner skate shops, one checkout. Product details come from the selling shop; checkout is on Bow Shock.
- Packages may ship separately from each shop
- Free US shipping on orders $150+
The 73mm by 56mm Seismic Speed Vent is molded around our proprietary weight-saving Energy Conversion (EC) hub – the first tall, wide hub seen in longboarding and still second-to-none. The 73mm diameter gives it the roll speed of a larger wheel, while the weight-saving hub adds the quickness and agility of a smaller wheel, as well as enhanced rebound. Combined with lips designed for pure grip, the Speed Vent stands in a class by itself.
Poured in Defcon urethane: Guinness WR speed • directional slide • long-lasting grip • slow, consistent wear
Features:
- 73mm tall x 56mm wide SPEED VENT Wheels
- 55mm running surface
- Offset bearing seat
- Square outside edge, beveled inside edge 6.1 oz. each
- Sold in sets of FOUR wheels
