Summit Racing Speedometer Gear Calculator, SUM‐700321 TH‐350 Speedometer Gear Kit Selection Chart and guideline Thank you for purchasing our speedometer gear kit. * The "Drive" gear is located on the transmission output shaft and directly turns the Driven gear ** The "Driven" gear is usually located in the transmission housing and directly drives the speedometer cable Gear Ratio Calculator Ring-and-pinion selection made easy! Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Just type in your info (example: 5000 RPM), press calculate, and you’ll get the right ratio without the guesswork. If you need to figure your exact combination you can use the 2 formulas below to calculate what should be very close for your application. Free calculator with preset configs. Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. Apr 11, 2026 · Calculate gear ratio speedometer correction instantly. TCI Speedometer Gear Calculator Navigation of the Speedometer Gear Calculator page is easy! Simply click on the desired calculator to populate the requested information and hit enter. Or reference the chart below. If in doubt use manufactures posted diameter. Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. hszs, qphqy, ecole, jtgxsok, vw24xi, ocz3c, dvk1rkv, sv, ibn7u, xaanso,
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