The Mittler Bros. Bolt Circle Adapter — Steel converts the bolt circle of a 5×5 hub to accept wheels drilled for a 4×4-1/2 or 4×4-3/4 bolt pattern. Machined from steel for maximum strength and durability, it installs between the hub and wheel to open up wheel fitment options without changing the hub itself — the heavy-duty choice for high-load race applications.
Includes hub cap and all required hardware. For the same conversion in aluminum, see the Bolt Circle Adapter — Aluminum (SKU 1400-017-A). For rotor adapter plates (not bolt circle converters), see the 10-hole Rotor Adapter (SKU 1400-002-A/S) and 8-hole Rotor Adapter (SKU 1400-003-A/S). Made in the USA.
