13
Since the 1/12th scale foam tires diameter is always changing due to wear, finding the right pinion and spur gear choice is dependent on tire size. Please check the
following chart, which shows roll-out, or the distance in mm the car will travel with one rotation of the motor. The correct roll out will depend on track size, motor type,
class type, and many other factors. Fine tuning will be required in this area, but please use this chart as a reference.
R o l l - O u t
リヤタイヤ径 The Diametor of Rear Tire
88T
スパーギヤ Spur Gear
ピニオン
ギヤ
Pinion
Gear
24.4
25.8
27.1
28.5
29.8
31.2
32.5
25.0
26.4
27.8
29.2
30.6
32.0
33.4
25.7
27.1
28.5
30.0
31.4
32.8
34.3
26.3
27.8
29.3
30.7
32.2
33.6
35.1
27.0
28.5
30.0
31.5
33.0
34.5
36.0
27.6
29.2
30.7
32.2
33.8
35.3
36.8
28.3
29.8
31.4
33.0
34.5
36.1
37.7
28.9
30.5
32.1
33.7
35.3
36.3
38.5
29.5
31.2
32.8
34.5
36.1
37.8
39.4
30.2
31.9
33.5
35.2
36.9
38.6
40.2
30.8
32.5
34.3
36.0
37.7
39.4
41.1
31.5
33.2
35.0
36.7
38.5
40.2
42.0
32.1
33.9
35.7
37.5
39.3
41.0
42.8
32.8
34.6
36.4
38.2
40.0
41.9
43.7
18T
19T
20T
21T
22T
23T
24T
38mm
39mm
40mm
41mm
42mm
43mm
44mm
45mm
46mm
47mm
48mm
49mm
50mm
51mm
リヤタイヤ径 The Diametor of Rear Tire
90T
スパーギヤ Spur Gear
ピニオン
ギヤ
Pinion
Gear
23.9
25.2
26.5
27.8
29.2
30.5
31.8
24.5
25.9
27.2
28.6
29.9
31.3
32.7
25.1
26.5
27.9
29.3
30.7
32.1
33.5
25.7
27.2
28.6
30.0
31.5
32.9
34.3
26.4
27.8
29.3
30.8
32.2
33.7
35.2
27.0
28.5
30.0
31.5
33.0
34.5
36.0
27.6
29.2
30.7
32.2
33.8
35.3
36.8
28.3
29.8
31.4
33.0
34.5
36.1
37.7
28.9
30.5
32.1
33.7
35.3
36.9
38.5
29.5
31.2
32.8
34.4
36.1
37.7
39.4
30.1
31.8
33.5
35.2
36.8
38.5
40.2
30.8
32.5
34.2
35.9
37.6
39.3
41.0
31.4
33.1
34.9
36.6
38.4
40.1
41.9
32.0
33.8
35.6
37.4
39.1
40.9
42.7
18T
19T
20T
21T
22T
23T
24T
38mm
39mm
40mm
41mm
42mm
43mm
44mm
45mm
46mm
47mm
48mm
49mm
50mm
51mm
リヤタイヤ径 The Diametor of Rear Tire
92T
スパーギヤ Spur Gear
ピニオン
ギヤ
Pinion
Gear
23.3
24.6
25.9
27.2
28.5
29.8
31.1
24.0
25.3
26.6
28.0
29.3
30.6
31.9
24.6
25.9
27.3
28.7
30.0
31.4
32.8
25.2
26.6
28.0
29.4
30.8
32.2
33.6
25.8
27.2
28.7
30.1
31.5
33.0
34.4
26.4
27.9
29.4
30.8
32.3
33.8
35.2
27.0
28.5
30.0
31.5
33.0
34.5
36.0
27.6
29.2
30.7
32.3
33.8
35.3
36.9
28.3
29.8
31.4
33.0
34.5
36.1
37.7
28.9
30.5
32.1
33.7
35.3
36.9
38.5
29.5
31.1
32.8
34.4
36.0
37.7
39.3
30.1
31.8
33.4
35.1
36.8
38.5
40.1
30.7
32.4
34.1
35.8
37.5
39.3
41.0
31.3
33.1
34.8
36.6
38.3
40.0
41.8
18T
19T
20T
21T
22T
23T
24T
38mm
39mm
40mm
41mm
42mm
43mm
44mm
45mm
46mm
47mm
48mm
49mm
50mm
51mm
Roll-Out ＝ Number of Pinion Gear Teeth ÷ Number of Spur Gear Teeth × Tire Diameter (mm) × 3.14
0°~ 0.5°is ideal.
0°〜−1°is ideal.
■ Adjust toe angle by changing the lenght of the steering
turnbuckle. A setting between 0 and .5 degrees is typical.
Ensure that the servo saver is at itʼs neutral position
(centered) before adjust. check to make sure both left and
right side turn buckles have the same length.
■ Adjust camber angle by changing the length of the
upper turnbuckle. Normally, set camber to between 0 and
-1 degrees. Changing the camber angle will have a
significant impact on the cars handling characteristics.
Generally, adding camber will increase intial steering.
■ Ride height adjustment will be done at first based on tire
diameter and axle height by adjusting front arm shims and
rear bearing holder offset. Generally, adjust ride height
depending on the track surface (smooth or bumpy). Usually,
a setting between 3~4mm is typical.
■ Check the ride height by measuring chassis height in 3
places. ▲Heights A - B - C as shown in the figure above.
■ Generally, it is best to set all locations even. Adjust height
B by changing shock spring pre-tension.
■ Finally, pod droop should be adjusted by changing the
shock length. Set droop by lifting up at point B until the
shock is fully extended. The difference in static height at B
and maximum height at B (shock fully extended) should be
around .5 - 1.5mm, depending on track conditions.
Turnbuckle
■ Adjust the side spring tension by moving the M3x10mm
set screw to move the spring holder. Adjust so that the
spring is just toughing the pod plate evenly on both sides
(0 pre-tension). Adding more tension to the springs will
increase the effective stiffness of the spring. Changing
tension side to side will affect the chassis tweak. Be sure to
check chassis tweak and adjust the side spring tension
accodingly to eliminate tweak. One way to quickly check
tweak and side spring adjustment is to measure the main
chassis height at the locations circled below. Make sure to
have exactly even sized tires installed on the car (set-up
wheels would be best). Chassis height should be even.
M3×10mm
Set Screw
【Adjust Toe Angle】
【Ride Height】
【Adjust Camber Angle】
【Adjustment of Side Springs】
Before Driving:
Okay
Decrease
Increase
A
B
C
Spring Pre-load
Adjustment
Shock Length
Adjustment
Turnbuckle
Check chassis height here:
