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DISC BRAKE ROTORS
U TYPE
HAT TYPE
Webb Rotor
Part Number Weight
Rotor
Type
A
B
C
D
E
F
Special
Info Application Information
Overall
Diameter
Disc
Thickness
Overall
Depth
Pilot
Diameter
Bolt Circle
Diameter
Bolt Holes
Number Size
54102P
36 HAT 14.75
1.345
3.81
5.40
6.75
5
0.66
GMC/Chevrolet Front Axles
54103P
36 HAT 14.75
1.345
3.81
5.40
7.25
6
0.78
Ford Front Axles
54104P
37 HAT 14.75
1.345
3.81
5.40
6.75
6
0.66
GMC/Chevrolet Front Axles
54105P
36 HAT 14.75
1.345
3.81
5.40
7.25
6
0.78 Drilled for
ABS
Ford Front Axles
(ABS Applications)
54106P
36 HAT 14.75
1.345
3.81
6.00
7.25
10
0.59
School Bus/Light Truck
54107P
35 HAT 14.75
1.345
3.81
6.00
7.25
10
0.78
Ford Steer
54109P
36 HAT 14.75
1.345
3.81
5.40
6.75
6
0.66 Drilled for
ABS
Same as 54104 with ABS
54220P
80 HAT 17.08
1.77
5.16
5.32
6.61
12
0.75
MCI steer or tag for Meritor
EX225 ADB system
54255P
47
U 15.00
1.44
4.49
9.18
11.25
5
0.65
Navistar Front Axles
54256P
47
U 15.00
1.44
4.49
9.18
11.25
5
0.78
Navistar Front and
Rear Axles
54280P
56
U 15.00
1.435
6.00 14.25
12.75
5
0.78
Bendix Hydraulic
54281P
56
U 15.00
1.435
6.79
9.37
11.25
10
0.81
54282P
56
U 15.00
1.435
6.09 14.25
12.75
5
0.66
Bendix Hydraulic
54291P
50
U 15.00
1.435
4.88
9.25
11.25
6.00 0.78
Bluebird Bus Aftermarket
54292P
54
U 15.00
1.435
6.00
9.50
11.25
10
0.81
Bluebird Bus Drive Axle
Aftermarket
54301P
42 HAT 15.39
1.535
3.40
6.00
7.25
10
0.59
GMC/Chevrolet Front
and Rear Axles
54351P
51
U 15.39
1.535
4.75
9.25
11.25
6
0.78
Ford Front Axles
(1983 and Newer)
54352P
55
U 15.39
1.535
6.03
6.44
8.75
6
0.84
Ford Front Axles
(1984 and Newer)
54360P
60
U 15.39
1.535
6.07
8.69
11.25
10
0.84
Truck Hydraulic
54365P-65
61
U 15.39
1.54
7.60
9.12
11.25
10 0.938 ABS Bluebird TC2000 & 3000
Buses
54769P-65
39 HAT 15.00
1.435
3.50
5.40
6.75
5
0.78 ABS Navistar Front Axles
(ABS Applications)
(-65) Indicates rotor has corrosion protective coating.
P in part number indicates packaged rotor. Rotors are packaged for protection.