SRAM S7 User Manual

69
Technical Manual Gear Hub Systems 2010 · GEN.0000000002002 · Rev. A
SRAM S7 with coaster brake SRAM S7 without brake
Type
MH 7215 MH 7205
Brake
With coaster brake Without brake
Over Locknut Dim., OLD
130 mm 130 mm
Length, L
183.4 mm 183.4 mm
Ends Diameter, T
FG 10.5 FG 10.5
Dropout Width Dim. A
1
max. = 12.5 mm / A
2
max. = 12 mm A
1
max. = 12.5 mm / A
2
max. = 10 mm
Holes
36 36
Hole Diameter, DS
3.0 mm 3.0 mm
Hole Ref. ø, HR
75 mm 75 mm
Flange Dist. to
1
/
2
OLD
F
1
= 33 mm / F
2
= 34 mm F
1
= 33 mm / F
2
= 34 mm
Totally
303 %
Speed 1 0,574
Speed 2 0,677
Speed 3 0,809
Speed 4 1,000
Speed 5 1,236
Speed 6 1,476
Speed 7 1,742
Usable Dimensions
1
/
2
" x
1
/
8
" or
1
/
2
" x
3
/
32
"
1
/
2
" x
1
/
8
" or
1
/
2
" x
3
/
32
"
Line, C/D/E C = 54 mm / D = 51 mm / E = 48 mm C = 54 mm / D = 51 mm / E = 48 mm
Ratio 24", 26", 28"= 1.83 – 1.90 / 20"= 1.83 – 2.00 min. 1.83
Sprocket 16 – 24 Teeth (outward offset - Chain Line C) / 18 Teeth (straight - CL D) / 19 – 24 Teeth (inward offset - CL E)
Shifter SRAM Grip 7
Clickbox Clickbox S7
Tandem Not suitable for tandems, transport bicycles or similar
Weight 1714 g 1556 g
Hub Shell Material Steel Steel
Finish Matt Chrome Plated or Black Matt Chrome Plated or Black
SRAM
®
S7
TECHNICAL DATA / ASSEMBLY REQUIREMENTS
Caution:
Not suitable for tandems, transport
bicycles and similar.
Cycle frame:
• Dropouts must be parallel.
• Slot width at rear dropout 10
+0.5
mm.
• The strength must be such that with a
maxi mum braking torque of 250 Nm
(2200 in.lbs.) on the rear wheel no
residual deformation can occur on the
rear structure.
Compatibility AxleSpokeGear Hub RatioChainFinish
G
E
A
R
H
U
B
S
Gear steps
18 %
19 %
24 %
24 %
19 %
18 %
Version with Coaster Brake
R 100
Ø 7.3
HR
DS
A
1
maxA
2
max
F
2
F
1
L
1/2 OLD
OLD
C
D
E
7
min.
13.5
83
T
3.5

SRAM S7 Specifications

General

Brand	SRAM
Model	S7
Category	Bicycle Accessories
Language	English

Summary

SRAM S7 Technical Data

General Cautions

Important notes regarding suitability for specific bicycle types and maximum braking torque.

Cycle Frame Requirements

Specifications for frame dropouts, slot width, and strength for safe operation.

SRAM S7 Assembly

Hub Assembly Steps

Detailed steps for lacing the wheel, fitting dust cap and sprocket, and securing the circlip.

Shifter Assembly

Guidance on choosing cable housing, fitting the shifter and grip, and securing the clamp bolt.

Installing the Clickbox

Procedure for inserting the shift rod and Clickbox, aligning parts, and securing the unit.

Gear Adjustment

Steps for adjusting gears by matching marks on the Clickbox viewing window using the barrel adjuster.

SRAM S7 Maintenance

Recommended Service Interval

Guidance on periodic maintenance by a qualified mechanic every 2 years or 5000 km.

Removing the Wheel

Steps to prepare the shifter, loosen screws, disengage parts, and remove the wheel from the hub.

Dismantling the Hub

Detailed instructions for disassembling the hub, including removing components like circlips, locknuts, and gears.

Hub Reassembly Procedure

Step-by-step guide for reassembling the hub internal components and external parts with lubrication.

Reassembly Advice

Important tips for accurate gear assembly to prevent tight operation or damage.

Shift Cable Replacement

Instructions for replacing the shift cable and housing, including preparing the shifter and cable.

Clickbox Removal for Cable Change

Specific steps for removing the Clickbox for cable replacement and maintaining spring tension.