Street Park Square
Seismic SPEED VENT 77mm 77A
77mm · 77A · €€€
Seismic SPEED VENT 77mm wheels in Crystal Clear Blue 77A Premium Clear urethane. The 77x55mm shape uses a 54mm running surface, offset bearing seat, and square outer edge with a beveled inner edge for fast roll, strong grip, and smooth surfskate or carving lines.
Specifications
| Diameter ⊕ Larger wheels roll faster and handle rough terrain better. Smaller wheels accelerate quicker and keep the board lower. | 77mm |
| Durometer ⊕ Measured in A scale. Lower values (78A) grip more for carving. Higher values (83A+) slide easier for snaps. | 77A |
| Contact Patch ⊕ The width of rubber touching the ground. Wider patches grip more, narrower patches slide easier. | 54mm |
| Lip Profile ⊕ Round lips slide predictably. Square lips grip harder into turns before breaking traction. | Square |
| Core Type ⊕ Centerset cores wear evenly and can be flipped. Offset cores grip more on the inner edge. | Offset |
| Width ⊕ Overall wheel width. Wider wheels provide more stability and grip surface. | 55mm |
| Terrain | Street, Park |
| Year | null |
| Price Range | €€€ |
Wheel Size Comparison
Seismic SPEED VENT 77mm 77A
↕ Diameter↔ Contact Patch
Durometer Scale
Softer wheels (lower A) grip more for carving. Harder wheels (higher A) slide easier for snaps.
Speed & Acceleration
Larger wheels reach higher top speeds but take longer to accelerate. Smaller wheels accelerate faster but have a lower top speed.
Riding Profile
Calculated from diameter, durometer, lip profile and intended terrain.
Compatible Surfskates
No surfskates in our catalog use this exact wheel size.