Gear Chart - Table de rapports

Gear Chart Par Car / Tables de rapport Pro10-Pro12 (pdf)

File to do your own gear chart for On-Road & Off-Road cars (xls)

Fichier pour faire vos tables de rapport pour voitures de piste et tout-terrain (xls)

Calculate gear ratio (exe)

Calcul des Rapport (exe)

Gearchart.com

Team Novak - Brushless motor gearing recommendations
Les recommendations de Team Novak à propos des rapports

These gearings should be used as a starting point, but the motor and ESC temperatures should always be used to determine the final gearing.

Neither the motor (with sintered rotor) nor the ESC should be hotter than 160 to 175° F after a five minute run. If either temperature is higher than 160 to 175° F , the gearing should be lowered until both the ESC and the motor (with the sintered rotor) are under this temperature.

Over gearing the motor will result in excessive operating temperatures, which may result in internal damage. This type of damage is not covered under the product’s warranty.

The cooler the ESC runs, the better the performance of the system.

Motor

Touring Car*

2wd Buggy*

2wd Truck*

4wd Buggy*

1/12 Scale**

Oval**

3.5

10.5

Not Rec.

Not Rec.

Not Rec.

1.1"/28 mm

1.2"/31 mm

4.5

9.5

Not Rec.

13

12

1.2"/30.5 mm

1.3"/33 mm

5.5

8.5

11

12.5

11

1.3"/33 mm

1.4"/35 mm

6.5

7.5

10

11.5

10

1.4"/35 mm

1.5"38 mm

7.5

7

9.5

11

9.5

1.5"/38 mm

1.6"/40.5 mm

8.5

6.5

9

10.5

9

1.6"/40.5 mm

1.7"/ 43 mm

10.5

5.5

8

9.5

8

2"/51 mm

2.6"/ 66 mm

13.5

4.5

7

8.5

7

2.30"/58 mm

2.9"/ 73.5 mm
17.5
3.5
6
7.5
6

2.56"/65 mm

3.23"/82 mm
* These gearings are given in the Final Drive Ratio (FDR) form for standard-sized rubber tires. If you choose to use different sized tires, use the formula below (in note **) for rollout to determine the proper gearing for your tire’s diameter.

Using standard-sized tires to calculate your FDR, first divide your vehicle's spur gear by the pinion gear, then multiply that result by the internal drive ratio of the car. The internal drive ratio can be found in the documentation that comes with your vehicle. EX. (72 spur ÷ 21 pinion) x 2.5 internal drive ratio = 8.57 FDR

**
Gearing is given in rollout. Rollout is determined by dividing the tire circumference (tire diameter x 3.14) by the spur and pinion gear ratio. EX. (1.75” x 3.14) ÷ (100 ÷ 23) = 1.26 rollout