Andrews Products - TOP LOADER GEAR SET RATIOS

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Overall Gear Ratio Chart

378 Different Ratio Combinations

Main drive gear set ratios (4th gear trans ratio is 1:1)

Main Drive Teeth:

29/20

28/20

25/18

28/21

27/21

24/19

27/22

26/22

23/20

26/23

25/23

22/21

22/22

21/22

Main Drive Ratio:

1.450

1.400

1.389

1.333

1.286

1.263

1.227

1.182

1.150

1.130

1.087

1.048

1.000

0.955

First-Reverse cluster gear set ratios

Tooth count

Ratio

33/15-17

2.200

3.190

3.080

3.056

2.933

2.829

2.779

2.700

2.600

2.530

2.487

2.391

2.305

2.200

2.100

34/16-17

2.125

3.081

2.975

2.951

2.833

2.732

2.684

2.608

2.511

2.444

2.402

2.310

2.226

2.125

2.028

33/17-16

1.941

2.815

2.718

2.696

2.588

2.496

2.452

2.382

2.294

2.232

2.194

2.110

2.034

1.941

1.853

32/18-16

1.778

2.578

2.489

2.469

2.370

2.286

2.246

2.182

2.101

2.044

2.010

1.932

1.862

1.778

1.697

31/18-15

1.722

2.497

2.411

2.392

2.296

2.214

2.175

2.114

2.035

1.981

1.947

1.872

1.804

1.722

1.644

32/19-15

1.684

2.442

2.358

2.339

2.246

2.165

2.127

2.067

1.990

1.937

1.904

1.831

1.764

1.684

1.608

31/19-15

1.632

2.366

2.284

2.266

2.175

2.098

2.061

2.002

1.928

1.876

1.844

1.773

1.709

1.632

1.557

30/19-14

1.579

2.289

2.211

2.193

2.105

2.030

1.994

1.938

1.866

1.816

1.785

1.716

1.654

1.579

1.507

30/20-16

1.500

2.175

2.100

2.083

2.000

1.929

1.895

1.841

1.773

1.725

1.696

1.630

1.571

1.500

1.432

30/21-16

1.429

2.071

2.000

1.984

1.905

1.837

1.805

1.753

1.688

1.643

1.615

1.553

1.497

1.429

1.364

Second gear set ratios

Tooth count

Ratio

29/20

1.450

2.103

2.030

2.014

1.933

1.864

1.832

1.780

1.714

1.668

1.639

1.576

1.519

1.450

1.384

28/20

1.400

2.030

1.960

1.944

1.867

1.800

1.768

1.718

1.655

1.610

1.583

1.522

1.467

1.400

1.336

25/18

1.389

2.014

1.944

1.929

1.852

1.786

1.754

1.705

1.641

1.597

1.570

1.510

1.455

1.389

1.326

28/21

1.333

1.933

1.867

1.852

1.778

1.714

1.684

1.636

1.576

1.533

1.507

1.449

1.397

1.333

1.273

27/21

1.286

1.864

1.800

1.786

1.714

1.653

1.624

1.578

1.519

1.479

1.453

1.398

1.347

1.286

1.227

24/19

1.263

1.832

1.768

1.754

1.684

1.624

1.596

1.550

1.493

1.453

1.428

1.373

1.323

1.263

1.206

27/22

1.227

1.780

1.718

1.705

1.636

1.578

1.550

1.506

1.450

1.411

1.387

1.334

1.286

1.227

1.171

Third gear set ratios

Tooth count

Ratio

26/22

1.182

1.714

1.655

1.641

1.576

1.519

1.493

1.450

1.397

1.359

1.336

1.285

1.238

1.182

1.128

23/20

1.150

1.668

1.610

1.597

1.533

1.479

1.453

1.411

1.359

1.323

1.300

1.250

1.205

1.150

1.098

26/23

1.130

1.639

1.583

1.570

1.507

1.453

1.428

1.387

1.336

1.300

1.278

1.229

1.184

1.130

1.079

25/23

1.087

1.576

1.522

1.510

1.449

1.398

1.373

1.334

1.285

1.250

1.229

1.181

1.139

1.087

1.038

22/21

1.048

1.519

1.467

1.455

1.397

1.347

1.323

1.286

1.238

1.205

1.184

1.139

1.098

1.048

1.000

22/22

1.000

1.450

1.400

1.389

1.333

1.286

1.263

1.227

1.182

1.150

1.130

1.087

1.048

1.000

0.955

21/22

0.955

1.384

1.336

1.326

1.273

1.227

1.206

1.171

1.128

1.098

1.079

1.038

1.000

0.955

0.911

23/25

0.920

1.334

1.288

1.278

1.227

1.183

1.162

1.129

1.087

1.058

1.040

1.000

0.964

0.920

0.878

23/26

0.885

1.283

1.238

1.229

1.179

1.137

1.117

1.086

1.045

1.017

1.000

0.962

0.927

0.885

0.844

20/23

0.870

1.261

1.217

1.208

1.159

1.118

1.098

1.067

1.028

1.000

0.983

0.945

0.911

0.870

0.830

To calculate any gear ratio on this page:

Example: 25/23 (main drive) x (23/20)

Multiply main drive ratio by speed ratio;

Overall ratio = 25/23 x 23/20 = 1.250

rev 20030507

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Andrews Products, Inc.
431 Kingston Ct.
Mount Prospect, IL
60056

847 - 759 - 0190 phone
847 - 759 - 0848 fax

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