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Quick Change Gears

Quick Change Gears

Speedway Engineering is a stocking distributor for Quarter Master quick change 6-spline gears.

RECOMMENDED APPLICATIONS

6-Spline gears fit Mini Stock Quick Change and Midget Quick Change rear ends. These are 1" thick. Our Mini Stock Quick Change rear ends are designed to use Quick Change gears up to 1.375" wide. A #85-051 spacer is required to use standard 1" wide QC gears.

6-Spline Mini Stock Quick Change and Midget Quick Change Gears Part No: MG # (see chart below)

10-Spline gears fit Super Max and standard Quick Changes. Use Part No: CG# (see chart below)

HOW TO USE THE FOLLOWING GEAR CHARTS

  • Select the correct gear chart 10-Spline Gears or 6-Spline Gears
  • Find ring and pinion ratio
  • Find desired final drive
  • Read across to gear set number
  • The gear with the greatest number of teeth placed on top shaft will give you a low ratio
  • The gear with the smallest number of teeth placed on top shaft will give you a high ratio

 

MINI-STOCK AND MIDGET 6 SPLINE GEAR SETS

Gear Set No. Number of Small Teeth Number of Large Teeth Low Spur Ratio 4.11 Ring & Pinion Low 4.11 Ring & Pinion High
1 30 30 1.000 4.11 4.11
2 23 24 1.043 4.29 3.94
2A 35 37 1.057 4.35 3.89
3 23 25 1.087 4.47 3.78
3B 17 19 1.118 4.59 3.68
3A 22 25 1.136 4.67 3.62
4 22 26 1.182 4.86 3.48
4Q 20 24 1.200 4.93 3.43
5 21 26 1.238 5.09 3.32
5A 19 24 1.263 5.19 3.25
6 21 27 1.286 5.29 3.20
24Q 16 21 1.313 5.40 3.13
25 15 20 1.333 5.48 3.08
7Q 17 23 1.353 5.56 3.04
23 16 22 1.375 5.65 2.99
8 20 28 1.400 5.76 2.94
22 19 27 1.421 5.84 2.89
9 16 23 1.438 5.91 2.86
10 15 22 1.467 6.03 2.80
11 20 30 1.500 6.17 2.74
12 19 29 1.526 6.27 2.69
13 28 43 1.536 6.31 2.68
14 23 36 1.565 6.43 2.63
15 15 24 1.600 6.58 2.57
16 16 26 1.625 6.68 2.53
16Q 17 28 1.647 6.77 2.50
17 27 45 1.667 6.85 2.47
18 17 29 1.706 7.01 2.41
18Q 22 38 1.727 7.10 2.38
18A 16 28 1.750 7.19 2.35
19 14 25 1.786 7.34 2.30
20 15 27 1.800 7.40 2.28
27Q 17 31 1.824 7.50 2.25
28Q 20 37 1.850 7.61 2.22
21 25 47 1.880 7.73 2.19
29Q 20 38 1.900 7.81 2.16
26 20 39 1.950 8.02 2.11
30 24 48 2.000 8.22 2.06
31 23 47 2.043 8.40 2.01
32 23 48 2.087 8.58 1.97
33 15 33 2.200 9.04 1.87
34Q 18 41 2.278 9.36 1.80

SUPER-MAX AND STANDARD QUICK CHANGE 10 SPLINE GEAR SETS

Gear Set No. Number of Small Teeth Number of Large Teeth Spur Ratio 4.11 Ring & Pinion Low 4.11 Ring & Pinion High 4.86 Ring & Pinion Low 4.86 Ring & Pinion High
1 27 27 1.000 4.11 4.11 4.86 4.86
1Q 35 36 1.029 4.23 4.00 5.00 4.72
2 27 28 1.037 4.26 3.96 5.04 4.68
5 22 23 1.045 4.30 3.93 5.08 4.65
15 19 20 1.053 4.33 3.91 5.11 4.61
26 27 29 1.074 4.42 3.83 5.22 4.52
6 22 24 1.091 4.48 3.77 5.30 4.45
6Q 21 23 1.095 4.50 3.75 5.32 4.44
25 19 21 1.105 4.54 3.72 5.37 4.39
12 26 29 1.115 4.59 3.69 5.42 4.35
7 23 26 1.130 4.65 3.64 5.49 4.30
7Q 21 24 1.143 4.70 3.60 5.55 4.25
17 25 29 1.160 4.77 3.54 5.63 4.19
8Q 23 27 1.174 4.83 3.50 5.70 4.14
8 22 26 1.182 4.86 3.48 5.74 4.11
19 21 25 1.190 4.89 3.45 5.78 4.08
9Q 25 30 1.200 4.93 3.43 5.83 4.05
9 19 23 1.211 4.98 3.40 5.88 4.01
11 22 27 1.227 5.05 3.35 5.96 3.96
3 21 26 1.238 5.09 3.32 6.01 3.92
13 24 30 1.250 5.14 3.29 6.07 3.89
18 23 29 1.261 5.18 3.26 6.12 3.85
18Q 22 28 1.273 5.23 3.23 6.18 3.82
4Q 18 23 1.278 5.25 3.22 6.21 3.80
20Q 21 27 1.286 5.29 3.20 6.24 3.78
4 24 31 1.292 5.31 3.18 6.27 3.76
20 23 30 1.304 5.36 3.15 6.34 3.72
22 22 29 1.318 5.42 3.12 6.40 3.68
16 18 24 1.333 5.48 3.08 6.48 3.64
10 20 27 1.350 5.55 3.05 6.56 3.60
34 22 30 1.364 5.61 3.01 6.62 3.56
34Q 21 29 1.381 5.68 2.98 6.71 3.52
14 23 32 1.391 5.72 2.95 6.76 3.49
14Q 20 28 1.400 5.76 2.94 6.80 3.47
35 22 31 1.409 5.79 2.92 6.84 3.45
32 19 27 1.421 5.84 2.89 6.90 3.42
32Q 23 33 1.435 5.90 2.87 6.97 3.39
24 20 29 1.450 5.96 2.84 7.04 3.35
36 17 25 1.471 6.05 2.80 7.14 3.30
37 21 31 1.476 6.07 2.78 7.17 3.29
23 22 33 1.500 6.17 2.74 7.29 3.24
21 21 32 1.524 6.26 2.70 7.40 3.19
21Q 15 23 1.533 6.30 2.68 7.45 3.17
27 20 31 1.550 6.37 2.65 7.53 3.13
43 16 25 1.563 6.42 2.63 7.59 3.11
28 19 30 1.579 6.49 2.60 7.67 3.08
28Q 22 35 1.591 6.54 2.58 7.73 3.05
29 20 32 1.600 6.58 2.57 7.77 3.04
39 18 29 1.611 6.62 2.55 7.83 3.01
30 16 26 1.625 6.68 2.53 7.90 2.99
40 19 31 1.632 6.71 2.52 7.92 2.98
41 20 33 1.650 6.78 2.49 8.01 2.94
31 18 30 1.667 6.85 2.47 8.10 2.91
33Q 19 32 1.684 6.92 2.44 8.18 2.88
33 20 34 1.700 6.99 2.42 8.26 2.86
31A 14 24 1.714 7.05 2.40 8.33 2.83
30A 15 26 1.733 7.13 2.37 8.42 2.80
50Q 16 28 1.750 7.19 2.35 8.50 2.78
51Q 17 30 1.765 7.25 2.33 8.57 2.75
52Q 18 32 1.778 7.31 2.31 8.63 2.73
53Q 14 25 1.786 7.34 2.30 8.67 2.72
54Q 15 27 1.800 7.40 2.28 8.74 2.70
55Q 16 29 1.813 7.45 2.27 8.80 2.68
57Q 16 30 1.875 7.71 2.19 9.11 2.59