APT INSTRUMENTS

952-881-7095

The Exclusive Smiths Gauge World Wide Sales & Service Center

SPEED CORRECTION DEVICES

        APT makes custom ratio adapters for any type vehicle.  See adapter prices below.  We also have the Electronic Speed Adapter (ESA).

        Ratio adapters are used to correct inaccurate speedometer operation resulting from a change in a vehicle's transmission, axle ratio, tire or wheel size.   There's a wide variety of adapters, including electronic adapters for late model vehicles which are easy to use and easy to install.. 

        Please see our Ratio Test to help determine your problem before you contact us.  To order, fill out our Customer Form and fax to 952-881-2680 or call the APT Instruments tech line at 952-881-7095 if you have questions..
 

STRAIGHT THROUGH AND OFFSET RATIO ADAPTERS $95

7/8, 18 thread fitting.
 

Custom ratio adapters built to almost any ratio.
 

RIGHT ANGLE ADAPTERS $125

Note:  1:1 Ratio Only

OTHER ADAPTERS:

    -GM Ratio Adapters - see a list of Surplus GM Ratio Adapters 
    -Smiths Cable Angle Drives - see Smiths accessories 
    -Electronic Ratio Adapters - see ESA

We accept Visa, MasterCard, Discover, American Express, money orders, PayPal and checks.

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Last modified: May 14, 2013