Vintage Components - Sachs Freewheels
On this page:
7-Speed: Aris 7-speed 12-21 | Aris 7-speed 12-24 | Aris 7-Speed 13-24
8-speed: Aris 8-speed 12-21 | Aris 8-speed 12-24 | Aris 8-speed 12-26 | Aris 8-speed 13-20
Sachs Freewheel bodies: 7-speed
Sachs Freewheel cogs: 13-tooth | 21-tooth | 28-tooth | 30-tooth
In the 1990s the Sachs Aris freewheel was the go-to component of choice. Aris (Advanced Rider Index System) freewheels came in 6, 7 & 8-speed versions.
Sachs freewheels have a lubrication port that allows a mechanic to lube the freewheel body after removing the cogs. Further disassembly of the freewheel body is not necessary to lubricate the freewheel.
What was incredible was their extraordinary compatibility with the various indexed systems. They can generally be made to work on Campagnolo Syncro, Mavic, Shimano and Suntour Accushift systems.
Bikepro.com wrote:
The tooth profile, Sachs calls "RGS" for "Rapid Grip and Shift". Each of the teeth on the cogs are the same, and they are the same on all cogs in the set. The front of the tooth is machine beveled, to make it thin at the top, and thicker at the bottom. The top of each tooth has a V-shaped groove in it running lengthwise, then the back half of each tooth top is crimped, pushing the V on the back closed, and raising the tooth height slightly at the rear. A single, simple system.
The cogs are made of steel, that is hardened prior to being nickel plated, giving them a bright silver color. The 4 largest cogs have plastic spacers between them, the set of three weighs 8 grams. The 2nd, 3rd, or on an 8 speed freewheel, the 4th position cog thread onto the freewheel body. The 1st, or on an 8 speed F/W, 1st and 2nd position cog thread internally into the cog ahead of them in line. This threading of the first, or first and second cog, into the next is why the Sachs Aris freewheel can make an eight cog freewheel still fit, and work, on just a 130mm over lock nut dimensioned rear hub.
The outer cone race is forged of steel, that has four dimples pressed into the outside face to remove it, by turning it clockwise, with some difficulty. The cone race itself is ground and polished before it's given its Black color. The inner and outer body pieces are forged as a single piece of steel, with all races ground and polished, before they are given their black color. Beneath the outer cone race are thirty-one 3.0mm diameter steel ball bearings revolving in a polished cup race built as a part of the inner body piece.
Sachs Aris 7-speed 12-21 freewheel. Used. $60.00
Part# FW-50-02
Almost no wear on this beauty (if a freewheel can be called a beauty)
It looks just as good from the side.
Sachs Aris 7-speed 12-24 freewheel. Used
Sachs Aris 7-speed 12-24 freewheel #1. Used. $60.00
Part# FW-52-03
It will even come with a box.
Close-up
Sachs Aris 7-speed 12-24 freewheel #2. Used. $60.00
Side view
Top view
Here's the back of the freewheel.
Sachs Aris 7-speed 13-24 freewheel. Lightly used. $60.00
Part# FW-51-02
This freewheel is 38mm wide
Top view
Side view.
Sachs-Maillard 7-speed 13 - 34 freewheel. New, $80.00/each
- This freewheel is 34mm wide.
- Cog progression: 13, 15, 17, 19, 21, 24, 28, 34
Top view
Side view
Sachs Aris 8-speed 12-21 Freewheel. New, $80.00
Sachs Aris 8-speed 12-21 Freewheel #1. New, $80.00
Part# 55135
Still new, after all these years.
Sachs Aris 8-speed 12-21 Freewheel #2. New, $80.00
Part# 55135-2
Sachs Aris 8-speed 12-24 freewheel. Used, $80.00/each
Tooth progression: 12, 13, 14, 15, 17, 19, 21, 24
Top view
From the side
And here's the back of the freewheel.
Sachs Aris 8-speed 12-26 freewheel. Used, $80.00/each
Tooth progression: 12, 14, 16, 18, 20, 22, 24, 26
Top view
From the side
Here's the back of the freewheel.
Sachs Aris 8-speed 13-20 Freewheel. New, $80.00
Part# 55126
Teeth: 13/14/15/16/17/18/19/20
Sachs Aris sealed 7-speed freewheel body. New, $60.00
Part# 56460
Nice and new
Sachs 13-tooth cog. Used, $15.00/each
Top
And flipped over
Sachs 21-tooth cog. Used, $15.00/each
Sachs 28-tooth cog. Used, $15.00/each
Side one.
Side two
Sachs 30-tooth cog. Used, $15.00/each
Here's one side
And here's the cog turned over.
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