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7 speed hub

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C5 ENTHUSIAST + RESTORER:
Hi I have picked two Sachs s7 super 7 speed hubs one compete with cable and twist grip and one without but hope to find one on EBay later . So as soon as I get back from my holidays I will be starting a new restoration with one of the 7 speed hubs in place but before I start on the C5 restoration I will be stripping the hubs down and cleaning and greasing them and also making sure they work I know the one with the twist grip works as I tested it before taking it off the bike ..
The Gear ratios are as follow

1st gear = 0.59
2nd " = 0.69
3rd " = 0.81
4th Direct drive
5th. " = 1.24
6th " = 1.48
7th. ". = 1.69

That is at it was on the bike but it will change when I put the other cog on (if I can get it welded on ok )



image by charlessnarski, on Flickr
Bye Chas




image by charlessnarski, on Flickr

C5 ENTHUSIAST + RESTORER:
Just testing to see if they where all working

I have been testing the hubs today using a wheel straightener that I made .And swapping over the cable and click box twist grip and the pin that goes through the spindle from one to the other before I buy any parts and it looks like they are both good
What I will do is to as my friend to order the items off eBay in Germany ...
Will post some photos ASAP
Bye Chas     



image by charlessnarski, on Flickr



All working as they should ,so started on the frame




image by charlessnarski, on Flickr

C5 ENTHUSIAST + RESTORER:
Hi Just made up the 7speed hub bracket and fitted it to the frame .
Then fitted the hub to it just checking that it fits ok and it does ,so the next thing was to get a cog for the back wheel so I decided to use a 6 speed cog  but it will not be fastened in place until I have done some test on peddling speeds as I do not know how fast or slow I will have to peddle .
So I will fit  the cog on the back axle so that it will move from the small cogs to the biggest ones then making chains to all sizes then I will have some idea where to weld it

https://www.flickr.com/photos/102734262@N02/14758645118/



image by charlessnarski, on Flickr




image by charlessnarski, on Flickr




image by charlessnarski, on Flickr

C5 ENTHUSIAST + RESTORER:
Hi just made myself a back brake mod that I will be fitting to the  C5  .



image by charlessnarski, on Flickr

C5 ENTHUSIAST + RESTORER:
Hi I have also been doing some testing and still not sure how it will run I decided to make a smaller front crank (35  teeth ) the original has 42 teeth
In the meantime I will be making two chains and try both but not until it has been finished ...




image by charlessnarjski, on Flickr







Hi just finished testing the hub on the frame also fitted the rear brake mod .
 Regarding the hub I wanted to make sure that I geared it down to make it easer to peddle when You come across an incline  or want to get some speed up but as with the normal C5 you have to peddle  hard to keep it going ,without the7speed  hub turning the front crank around once will turn the wheels round twice
.Here is the gearing using the 7 speed hub after gearing it down .
First gear would give you when the crank goes round once the wheels will go round  1.15 times

Sec  gear would give you 1.25 turns
Third gear.                        1.50  " "
Forth gear.                        1.75. " "
Fifth gear                           2.00  " " same speed as it would be without the hub being fitted
Sixth gear.                        2.75  " "
Seventh                              3.00  " "
So it will make it a lot easer to peddle up hills and also to peddle faster on the straight .

Photos to follow
The next thing it to restore the C5 and do a proper test with all the gears with me on it


[laugh] \:d/ [laugh]
Bye Chas



Hi here are some photos of the chassis with the hub fitted and tested ...Just need to get the back axle welded on .



3-IMG_0246 by CHAS SINCLAIR C5 RESTORER, on Flickr[biggrin] [biggrin] [biggrin] \:d/ \:d/ \:d/ \:d/




2-IMG_0247 by CHAS SINCLAIR C5 RESTORER, on Flickr



1-IMG_0250 by CHAS SINCLAIR C5 RESTORER, on Flickr



Hi  just started on the body



image by charlessnarski, on Flickr



[charlessnarski, on Flickr[/url]
image by charlessnarski, on Flickr



image by charlessnarski, on Flickr




image by charlessnarski, on Flickr



image by charlessnarski, on Flickr

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