Fullspin 6-Ball Steel XT Built-In Bearings - Seismic

Fullspin™ 6-Ball Steel XT™ Bearings with Patented High-Precision Built-In Spacer System

Next-level skate bearing tech – more speed, better handling, longer life!
Fit standard 8mm axles only.

We spent over two years nerding out with a crack team of American engineers from one of the biggest and best bearing factories in the world, to raise the bar on bearing tech yet again! Roll tighter, truer, faster, and smarter on Fullspin: the absolute best skate bearings in the entire history of skate bearings!

THE BASICS (Scroll down for more in-depth technical info.)

6-Ball system –Less total friction, better acceleration and speed on straightaways. Recommended for LDP and top-speed pursuits.
Premium Steel balls – Superior Grade G10 balls spin truer with less friction inside bearings.
Exceptionally tight, consistent assembly and raceway tolerances – Significantly less internal play, friction, wear, and noise. Superior speed, handling, and durability.
Extra-tough steel and thicker outer rings – Raceways hold strictest curvature and finest surface finish – and bearings stay tight and fast – for far longer. Thicker, 60%-stiffer outer rings resist flexing, spin truer and faster, and keep seals from popping off on extreme impacts. Premium black oxide surface treatment adds exceptional corrosion resistance.
Next-level patented Built-In spacing / alignment system – Built-in half-spacers with extra-wide flanged endssquare up inside wheels with more than double the contact area of ordinary Built-In interfaces – powering absolutely unparalleled alignment precision and stability. System levels and steadies all working components of seated bearings far better than any other design (Built-In or Classic), to unleash near-perfectly optimized paired performance.Synergizes with all advanced features in individual bearings to maintain exceptionally consistent wheel contact and grip; support extremely predictable slide performance; and noticeably extend both wheel and bearing life.
High-end lubricant – Formulated for peak performance under real-world skating stresses (not max free-spin time).
Labyrinth-style outer seals – Edges of seals slot inside V-shaped grooves for maximum resistance to dust and debris.
Next-level anti-contaminant ball retainers – Expanded outer diameter slots into groove in outer ring just like a second seal, to form a unique integral barrier against dirt and grime.

More info:

6-Ball System

Six larger, stronger balls. Less total friction, better acceleration and speed on straightaways. Recommended for LDP and top-speed pursuits.

Premium Steel

Superior concentricity, surface smoothness, strength, and durability. Manufactured to Grade G10 spec for truer, lower-friction ball spin inside bearings; less energy loss; more speed; and longer bearing life.

Compared to balls used in run-of-the-mill skate bearings, G10 specs are 60% – 80% tighter for concentricity (roundness), and 50% – 67% stricter for surface smoothness. (In simpler terms, twice as smooth as the finest cue ball, 10 times as smooth as a mirror finish.)

XT (extra tough) Steel Ring Construction

Inner and outer rings precision-machined from superior steel with advanced heat treatment that fully optimizes metal’s crystalline microstructure. Raceways hold strictest curvature and finest surface finish – and bearings stay tight and fast – for far longer.

Outer rings are thicker and 60% stiffer than those seen on most other skate bearings (made with inferior steel). So they resist flexing, spin truer and faster, and keep seals from popping off on extreme impacts. Premium black oxide surface treatment adds exceptional corrosion resistance.

Radius reduced to bare minimum on all edges of both outer and inner rings – for fuller contact and more stable alignment inside bearing pockets of finer wheels; on axles of finer trucks; and at Built-In spacer interfaces. A Fullspin first!

Labrynth-Style Outer Seals 

Removable rubber-coated “no contact” steel seals with printed graphic. Edges of seals slot inside V-shaped grooves machined into both outer and inner rings. This “Labyrinth” interface maximizes resistance to dust and debris – which can only penetrate the bearing by navigating a twisting, maze-like path around seal edges.

Note: Seals protect bearings from environmental contaminants, which significantly accelerate wear. Properly-made “no contact” seals do not add friction. Brands that promote completely unsealed bearings just want you to wear yours out faster so they can sell you another set (that will also wear out prematurely).

Next Level Anti-Contaminant Ball Retainers

Fullspin’s custom ball retainers keep bearings cleaner for longer, without the addition of a second seal. They feature an expanded outer diameter that slots into a groove in the outer ring just like a second seal – to form a unique integral barrier against dirt and grime.

Molded from an engineering-grade fiber-reinforced composite specifically formulated by the German producer for high stiffness and dimensional stability in bearing retainers and similar components.