650/85R38

Optitrac 173A8/B R-1W
650/85R38
Technical data
Design Optitrac
Industry Classification R-1W
Tyre size 650/85R38
LI/SS 173A8/B
FR/DW n/a
PR n/a
TL/TT TL
Tyre Width (mm) 709
Overall diameter (mm) 2052
Static Loaded radius (mm) 905
Rolling circumference (mm) 6142
SRI 975
Weight (kg) 335
Nominal Inflation Pressure (bar) 2.4
Maximum Load (kg) 6500
Tread Depth (mm) 60
Recom 'd Rim Width DW23B
Other approved rims DW20B, DW21B
Load data
Type load (kg) at various inflation pressures (kPa)
Max Speed (Km/h)
Type load (kg) at various inflation pressures (kPa)
0.6bar 0.8bar 1.0bar 1.4bar 1.6bar 1.8bar 2.0bar 2.4bar 2.8bar 3.2bar
0.6bar 50 3550 4000 5000 5450 5800 6000 6500
0.8bar 40 3000 3550 4000 5000 5450 5800 6000 6500†
1.0bar 30 3210 3800 4280 5350 5830 6205 6420 6955
1.4bar 10 4500 5325 6000 7500 8175 8700 9000 9750
1.6bar 10cycl 6035 7845 8345 8885 9265 10055 10720

0.6bar

50 km/h n/a
40 km/h 3000 kg
30 km/h 3210 kg
10 km/h 4500 kg
10cycl km/h n/a

0.8bar

50 km/h 3550 kg
40 km/h 3550 kg
30 km/h 3800 kg
10 km/h 5325 kg
10cycl km/h n/a

1.0bar

50 km/h 4000 kg
40 km/h 4000 kg
30 km/h 4280 kg
10 km/h 6000 kg
10cycl km/h 6035 kg

1.4bar

50 km/h 5000 kg
40 km/h 5000 kg
30 km/h 5350 kg
10 km/h 7500 kg
10cycl km/h 7845 kg

1.6bar

50 km/h 5450 kg
40 km/h 5450 kg
30 km/h 5830 kg
10 km/h 8175 kg
10cycl km/h 8345 kg

1.8bar

50 km/h 5800 kg
40 km/h 5800 kg
30 km/h 6205 kg
10 km/h 8700 kg
10cycl km/h 8885 kg

2.0bar

50 km/h 6000 kg
40 km/h 6000 kg
30 km/h 6420 kg
10 km/h 9000 kg
10cycl km/h 9265 kg

2.4bar

50 km/h 6500 kg
40 km/h 6500† kg
30 km/h 6955 kg
10 km/h 9750 kg
10cycl km/h 10055 kg

2.8bar

50 km/h n/a
40 km/h n/a
30 km/h n/a
10 km/h n/a
10cycl km/h 10720 kg

3.2bar

50 km/h n/a
40 km/h n/a
30 km/h n/a
10 km/h n/a
10cycl km/h n/a

† Maximum load at recommended speed and inflation pressure.