AVAILABLE UNDER-DRIVE GEAR SETS: 1.31, 1.34, 1.37, 1.41, 1.48, 1.50, 1.56SEE OUR UNDER-DRIVES

RING AND PINION OPTIONS


WE SUPPLY ALL DIFFERENT BRANDS, SIZES AND RATIOS
















































3.70 3.89 4.11 4.29 4.57 4.71 4.88 5.00 5.14 5.29 5.33 5.37 5.39 5.43 5.57 5.67 5.83 5.88 6.00 6.20 6.33 6.50
9" X X X X X X X X X X X X X X X X X X X X


X X
X X X X X X X X X X X X X X
9.5" X X X X X
















10" X X X X X X X X X X
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RECCOMENDED RATIOS TO USE WITH UNDER-DRIVES































The V-Mar Racing Gear Ratio Computer

REAR END GEARING AND UNDER-DRIVE

1:1 RATIO PUT 1 UNDER-DRIVE
1ST GEAR 2ND GEAR
3RD GEAR OVER-DRIVE
REAR END GEARS MAX RPMs
TIRE DIAMETER DIAMETERX
INCHX

CALCULATED WHEEL SPEED
RPM

GEAR RATIO BY BRAND AND SIZE: PRICES START AT:
MOTIVE GEARS - 9" RATIOS: 3.70, 3.89, 4.11, 4.29, 4.57, 4.71, 4.88, 5.00, 5.14, 5.29, 5.33, 5.37, 5.39, 5.43, 5.67, 5.83, 5.88, 6:00, 6:20, 6.33, 6.50 PERFORMANCE GEAR $189
PRO GEAR $429
MOTIVE GEARS - 9.5" RATIOS: 3.89, 4.11, 4.29, 4.57 $600-700
MOTIVE GEARS - 10" RATIOS: 4.11, 4.29, 4.57, 4.71, 5.00, 5.14, 5.29, 5.33, 5.37, 5.39, 5.43, 5.83 $979
TOM'S GEARS - 9.5" RATIOS: 3.70 $749
TOM'S GEARS - 10" RATIOS: 3.70, 3.89, 4.11, 4.29, 4.57, 4.71, 6.00 $1,150
YUKON GEARS - 9" RATIOS: 3.70, 3.89, 4.11, 4.30, 4.56, 4.71, 4.86, 5.00, 5.13, 5.29, 5.43, 5.67, 5.83, 6.00, 6.14, 6.20, 6.33, 6.50 $239
GEAR WORKS - 10" RATIOS: 5.57 & 5.29 ONLY $3,200
9" IN-HOUSE GEAR POLISHING $150
10" IN-HOUSE GEAR POLISHING $200

We offer a wide range of gear ratio's based on size, ratio and manufacturer. Choose a ratio and use the calculator to determine max speed and max MPH with an under-drive unit by entering in the available gear sets.