Seismic Speed Vent 85 mm (77A) – Clear Purple

The Seismic Speed Vent 85 mm are high-performance longboard wheels, designed for maximum rolling speed and efficiency on long, straight sections and smooth paths. The Speed Vent combines a large wheel diameter with a specially designed, lightweight core (Energy Conversion Core) for high top speed, quick responsiveness, and improved rebound.

1. Brand: Seismic
2. Model: Speed Vent 85 mm
3. Color / Variant: Clear Purple (translucent / clear with a purple hue)
4. Hardness / Durometer: 77A (variant of this offer)
5. Diameter: 85 mm
6. Width: 52 mm
7. Contact Patch: 50 mm
8. Core Position: Offset (offset core for a better balance of grip and agility)
9. Scope of Delivery: Price is per 4 wheels (set of 4)

Features & Areas of Application

• Large diameter for very low rolling resistance and high top speed.
• Lightweight, hollow Energy Conversion (EC) core reduces rotational mass and increases agility.
• Profile with pronounced lips for good grip when riding straight and in fast cornering maneuvers.
• Ideal for long-distance pushing (LDP), cruising on paved bike paths, straight-line speed, and use on long, smooth sections.
• May be somewhat more prone to vibrations/chatter during aggressive sliding or downhill chatter – therefore less optimal if frequent drifts/slides are desired.

Formula Selection (Brief)

• Premium Clear: very clear, aesthetically pleasing urethane with a good balance of speed and grip.
• BlackOps: balanced mix of speed and durability with strong grip.
• DefCon: maximum performance (speed & rebound) with slightly lower durability.

Technical Data (Compact)

• Diameter: 85 mm
• Width: 52 mm
• Contact Patch: 50 mm
• Core Position: Offset
• Durometer (available variants): e.g., 75A, 77A, 78.5A, 79A, 80A (depending on formula/color)
• Weight (Set / approx.): Item weight approx. 0.66 kg (shop specification)

Conclusion

The Seismic Speed Vent 85 mm (Clear Purple, 77A) are an excellent choice for riders seeking high speed, very good rolling efficiency, and a high degree of rebound in an 85 mm format. Particularly suitable for long-distance, straight-line speed, and routes with good asphalt. For frequent slides or aggressive downhill use, the tendency for chatter should be considered.