Brand: SPA Design Racing Products
This is the same center portion included with our SPA Involute Spline Quick-Release Steering Hub (Part No. 3405). The slug is precision-machined from 4130 Chrome-Moly steel. A 1" long, 5/8" OD portion is designed to be pinned or welded into your steering shaft (fits 7/8" OD x .060" wall tubing). Sold individually. Hub sold separately (or click the link above for the full kit).
Note: The 20mm asymmetric spline size fits the SPA "QR1" series non-wired quick-release hubs only. Not interchangeable with any other series or brand. This slug is not designed to take a wiring connector.