Page 687 - 2017 Racecar Engineering Circle Track Parts and Accessories Catalog

8500 SERIES 10-SPLINE QUICK CHANGE GEARS FOR 10" REARS
Winters 10-spline, Quick Change gears, for use with 10" dia. ring gear are 1-3/8" wide, and machined, broached and
hobbed from quality SAE 8620 steel by Winters technicians. Sets 50 thru 58 are for limited horsepower applications only.
Winters also has an attractive poster (WINPOSTER10) which displays all available gear sets and ratios, an ideal reference chart for the wall of any race shop.
4.12 Axle Ratio High 4.86 Axle Ratio 4.12 Axle Ratio Low High 4.86 Axle Ratio
Gear (8-33 Teeth) Low Spur No. Of Spur (7-34 Teeth) Gear (8-33 Teeth) Spur No. Of Spur (7-34 Teeth)
Part No. Set No. Low High Ratio Teeth Ratio Low High Part No. Set No. Low High Ratio Teeth Ratio Low High
WIN8501 1 4.12 4.12 1.000 21/21 1.000 4.86 4.86 WIN8514 14 2.96 5.73 0.719 23/32 1.391 3.49 6.76
WIN8502 2 3.97 4.27 0.964 27/28 1.037 4.69 5.04 WIN8514A 14A 2.94 5.77 0.714 20/28 1.400 3.47 6.80
WIN8505 5 3.96 4.29 0.960 24/25 1.042 4.67 5.06 WIN8535 35 2.92 5.82 0.708 17/24 1.412 3.44 6.86
WIN8515A 15A 3.93 4.32 0.955 21/22 1.048 4.64 5.09 WIN8532 32 2.90 5.86 0.704 19/27 1.421 3.42 6.90
WIN8515 15 3.91 4.34 0.950 19/20 1.053 4.62 5.11 WIN8532A 32A 2.87 5.91 0.697 23/33 1.435 3.39 6.97
WIN8526 26 3.84 4.43 0.931 27/29 1.074 4.53 5.22 WIN8524 24 2.84 5.97 0.690 20/29 1.450 3.35 7.04
WIN8506 6 3.79 4.48 0.920 23/25 1.087 4.47 5.28 WIN8536 36 2.80 6.06 0.680 17/25 1.471 3.31 7.14
WIN8525 25 3.75 4.53 .0909 20/22 1.100 4.42 5.34 WIN8537 37 2.79 6.08 0.677 21/31 1.476 3.29 7.17
WIN8512 12 3.69 4.60 0.897 26/29 1.115 4.36 5.42 WIN8523 23 2.75 6.18 0.667 22/33 1.500 3.24 7.29
WIN8507 7 3.65 4.66 0.885 23/26 1.130 4.30 5.49 WIN8521 21 2.70 6.29 0.655 19/29 1.526 3.18 7.41
WIN8507A 7A 3.61 4.71 0.875 21/24 1.143 4.25 5.55 WIN8521A 21A 2.69 6.32 0.652 15/23 1.533 3.17 7.45
WIN8517 17 3.57 4.75 0.867 26/30 1.154 4.21 5.60 WIN8527 27 2.67 6.37 0.647 22/34 1.545 3.15 7.51
WIN8517A 17A 3.53 4.81 0.857 24/28 1.167 4.17 5.67 WIN8543 43 2.64 6.44 0.644 16/25 1.563 3.11 7.59
WIN8508A 8A 3.51 4.84 0.852 23/27 1.174 4.14 5.70 WIN8528 28 2.61 6.51 0.633 19/30 1.579 3.08 7.67
WIN8508 8 3.49 4.87 0.846 22/26 1.182 4.11 5.74 WIN8528A 28A 2.59 6.54 6.30 17/27 1.588 3.06 7.71
WIN8519 19 3.46 4.91 0.840 21/25 1.190 4.08 5.78 WIN8529 29 2.58 6.59 0.625 15/24 1.600 3.04 7.77
WIN8509A 9A 3.43 4.94 0.833 25/30 1.200 4.05 5.83 WIN8539 39 2.56 6.64 0.621 18/29 1.611 3.02 7.83
WIN8509 9 3.40 4.99 0.826 19/23 1.211 4.02 5.88 WIN8530 30 2.54 6.70 0.615 26/16 1.625 2.99 7.89
WIN8511 11 3.36 5.06 0.815 22/27 1.227 3.96 5.96 WIN8540 40 2.53 6.72 0.613 19/31 1.632 2.98 7.93
WIN8503 3 3.32 5.11 0.806 25/31 1.240 3.92 6.02 WIN8541 41 2.50 6.81 0.607 17/28 1.647 2.95 8.00
WIN8513 13 3.30 5.15 0.800 20/25 1.250 3.89 6.07 WIN8531 31 2.47 6.87 0.600 21/35 1.667 2.92 8.10
WIN8518 18 3.27 5.20 0.793 23/29 1.261 3.85 6.12 WIN8533 33 2.42 7.00 0.588 20/34 1.700 2.86 8.26
WIN8518A 18A 3.24 5.24 0.786 22/28 1.273 3.82 6.18 WIN8531A 31A 2.40 7.06 0.583 21/36 1.714 2.84 8.33
WIN8504A 4A 3.22 5.26 0.783 18/23 1.278 3.80 6.21 WIN8530A 30A 2.38 7.14 0.577 15/26 1.733 2.80 8.42
WIN8520A 20A 3.20 5.30 0.778 21/27 1.286 3.78 6.25 WIN8550 50 2.35 7.21 0.571 35/20 1.750 2.78 8.50
WIN8504 4 3.19 5.32 0.774 24/31 1.292 3.76 6.27 WIN8551 51 2.34 7.27 0.567 30/17 1.760 2.75 8.57
WIN8520 20 3.17 5.36 0.769 20/26 1.300 3.74 6.31 WIN8552 52 2.32 7.32 0.563 32/18 1.778 2.73 8.64
WIN8522 22 3.13 5.42 0.760 19/25 1.316 3.69 6.39 WIN8554 54 2.29 7.42 0.556 15/27 1.800 2.70 8.74
WIN8516 16 3.09 5.49 0.750 18/24 1.333 3.65 6.48 WIN8555 55 2.27 7.47 0.552 29/16 1.813 2.68 8.80
WIN8510 10 3.05 5.57 0.739 17/23 1.353 3.59 6.57 WIN8556 56 2.26 7.51 0.548 31/17 1.824 2.67 8.86
WIN8510A 10A 3.02 5.62 0.733 22/30 1.364 3.56 6.62 WIN8557 57 2.20 7.73 0.533 30/16 1.875 2.59 9.11
WIN8534A 34A 3.00 5.67 0.727 16/22 1.375 3.54 6.68 WIN8558 58 2.19 7.76 0.531 32/17 1.882 2.58 9.14
WIN8534 34 2.97 5.69 0.724 21/29 1.381 3.52 6.71

GEAR COVERS GEAR COVER ACCESSORIES
Cover Bearing Part Plug
Description Part No. No. Part No.
Aluminum Sprint WIN6390AR
Center, Lg. Ball WIN3736 WIN8659 –
Bearings/Retainers WIN7447
H.D. Sprint WIN6630 WIN7521 –
Gear Cover WIN6729
Mag. Sprint – WIN7332 WIN7874
Center Gear Cover WINK6746 WIN7794
Standard LW Part No. Description
Aluminum WIN6746 WIN7524 WIN7874 Standard High Nut Kit, Red, Includes (10) High Nuts,
Sprint Cover WIN6390AR (10) Studs And (10) Steel Balls
Note: All Covers Include Bearings. WIN6729 Sprint Center Gasket
WIN6729HD Sprint Center Gasket, Heavy Duty
WIN7447 O-Ring For Heavy Duty Sprint Bearing Cap
8500 SERIES WIN7794 Standard High Nut, Steel
10-SPLINE QUICK CHANGE WIN7794AR Standard High Nut, Red
GEAR POSTER WIN7794ASBK Short High Nut, Aluminum, Black
WINPOSTER10 WIN7794ASR Short High Nut, Aluminum, Red
Full sized (16-1/2" x 20") poster displays tooth WIN8447 O-Ring For 6-Bolt Sprint Center
count, and ring and pinion ratio data. Ideal for the
race shop or trailer.

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