Street Park
Seismic TANTRUM 68mm 81A
68mm · 81A · €€€
Seismic TANTRUM 68mm wheels in Crystal Clear Blue 81A Premium Clear urethane. The 68x43mm shape uses a fiber-reinforced hub and double-radius profile for a smooth, fast freeride setup with fresh grip and sugary slides once broken in.
Specifications
| Diameter ⊕ Larger wheels roll faster and handle rough terrain better. Smaller wheels accelerate quicker and keep the board lower. | 68mm |
| Durometer ⊕ Measured in A scale. Lower values (78A) grip more for carving. Higher values (83A+) slide easier for snaps. | 81A |
| Contact Patch ⊕ The width of rubber touching the ground. Wider patches grip more, narrower patches slide easier. | — |
| Lip Profile ⊕ Round lips slide predictably. Square lips grip harder into turns before breaking traction. | — |
| Core Type ⊕ Centerset cores wear evenly and can be flipped. Offset cores grip more on the inner edge. | Centerset |
| Width ⊕ Overall wheel width. Wider wheels provide more stability and grip surface. | 43mm |
| Terrain | Street, Park |
| Year | null |
| Price Range | €€€ |
Wheel Size Comparison
Seismic TANTRUM 68mm 81A
↕ 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
These surfskates come with 68mm wheels from the factory.