Speedometer Ratio Adapter | Built to Order | Ratios 0.5000–2.5000 | Automotive & Industrial

Speedometer Ratio Adapter – Built to Order

These precision-built speedometer cable ratio adapters are made to order in your choice of size, style, and ratio — engineered to correct speedometer readings when changing tire sizes, gear ratios, or transmission configurations. Compatible with automotive, oil & gas, wireline, and heavy industrial applications.

Select your Size (input end), Style (Straight or Off-Set), and Ratio (0.5000 to 2.5000) from the variant options above.

Available Sizes (Input End)

• 0.104 Square — Automotive
• 0.156 Tang — Automotive / Aircraft
• 0.187 Tang — Oil & Gas / Industrial

Available Styles

• Straight — Standard inline configuration
• Off-Set — For applications requiring an offset drive

Available Ratios

Ratios from 0.5000 (50% reduction) to 2.5000 (150% increase), including 1.000 (1:1 pass-through). Need a ratio not listed? Call or email us to inquire about custom ratios.

Key Features

• High-quality steel construction
• 7/8–18 thread pitch nut and thread
• Compatible with AC Delco and Stewart Warner replacement applications
• AC Delco OEM replacement adapters come pre-greased and fit GM vehicles (Chevrolet, Buick, Pontiac, Oldsmobile, GMC)
• Used in wireline rigs for downhole applications
• Used for speedometer cable correction and repair
• Suitable for rotary tools and heavy industry applications
• Does NOT include an adapter key — See Adapter Keys here

Important Notes

• ⚠️ Made to Order — Non-Returnable. Please confirm your size, style, and ratio before ordering.
• Watch: How Ratio Adapters Are Made