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Jim's Speedometer World

28% Speed up Speedometer Ratio Adapter

28% Speed up Speedometer Ratio Adapter

$167.99 USD
$167.99 USD
Sale Sold out
  • Made in USA
  • New in box, includes 4 piece keyway kit
  • Custom ratio available HERE



✅ Compatible with 7/8 by 18 thread speedometer cables
✅ All ratio adapters include the 4 piece key-way kit
✅ For use on the transmission/transfer case side
❌ Not compatible with any FORD application
❌ These adapters will not fit behind the speedometer cluster

This speedometer ratio adapter will speed up your speedometer reading.

Needed if your speedometer displays a lower number than your GPS reading.

11% Speed up

AA11111

Ratio 1.1111

20% Speed up

AA12020

Ratio: 1.2020

28% Speed up

AA12844

Ratio: 1.2844

38% Speed up

AA13846

Ratio: 1.3846

44% Speed up

AA14400

Ratio: 1.4400

50% Speed up

AA15000

Ratio: 1.5000

61% Speed up

AA16154

Ratio: 1.6154

78% Speed up

AA17778

Ratio: 1.7778

100% Speed up

AA20000

Ratio: 2.0000


Use the +61% adapter to convert MPH to Kilometers.

If you recently changed wheels and/or tires, and your speedometer is now reading incorrectly, a ratio adapter may be required.

Select the Speed Up Rate for your specific application.

If you need assistance calculating your percentage, send us a brief email with these speed readings to: jim@speedometer.world

The GPS displays:
 But your Speedometer displays:
40 mph
 ??
50 mph
 ??
60 mph
 ??

Be sure to give us these readings in this exact order, 40mph - 50mph - 60mph on the GPS versus what your Speedometer displays, to ensure the proper percentage.

☆ Made in USA ☆

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WE CAN HELP!

📧 Having trouble with your speedometer not agreeing with the GPS?

Send us a brief message with your current application specs and we can help you mastermind a solution!

EMAIL US!