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Technical Notes
Disc brake
dimensions
Disc brake mount dimensions
Shimano disc brakes are designed to fit the frame and fork as shown below.
(The dimensions shown below are as same as the International Standard disc brake mount.)
The following mount dimensions (A~H) for each model are recommended.
The gray area should be flat.
Note:
A bent brake mount may result in interference between the brake pad and rotor causing noise.
Front fork dimensions
Part: A
Model
A
(min)
Wiring type
BR-M965
6mm
BR-M755
6mm
BR-M555
6mm
BR-M525
8mm
Cap type
BR-M515
BR-C601
8mm
BR-M475
BR-C501
Part: B
Model
A
(min)
Wiring type
BR-M965
6mm
BR-M755
6mm
BR-M555
6mm
BR-M525
8mm
Cap type
BR-M515
BR-C601
8mm
BR-M475
BR-C501
15
Part: A
Part: B
Dimension
B°
C°
D
(min)
(min)
(max)
60
60
12mm
60
60
-
60
30
-
-
45
8mm
65
-
8mm
45
Dimension
B°
C°
D
(min)
(min)
(max)
60
60
8mm
60
60
-
30
60
10mm
45
45
8mm
90
-
6.5mm
-
45
8mm
+1
7
0
4 ±
0.1
F°
G°
H
(min)
(max)
(min)
-
-
-2.5mm
-
-
-6.5mm
-
60
1mm
45
-
1mm
50
30
4mm
45
45
1mm
F°
G°
H
(min)
(max)
(min)
-
-
-2.5mm
-
-
-6.5mm
-
-
1mm
45
-
1mm
4mm
10
40
1mm
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