Tekton Precision-Profiled XT Steel Spacers
Premium 0.400-inch steel bearing spacers.

Machined from premium bearing steel and given advanced heat treatment, Tekton Precision-Profiled XT (Extra-Tough) Steel Spacers have extra-wide ends that square up against classic (non-built-in) bearings with nearly 60% more surface contact aligning the bearings far more stably than traditional thin-tube spacers formed of much softer iron or aluminum (which can actually compress and deform under the stresses of modern downhill and freeriding).

The resulting optimized alignment means:
Improved speed & acceleration
More consistent wheel contact & grip while cornering
More predictable slide release & hookup
Longer wheel & bearing life