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bicycle spedo
Maradona - 6/5/09 at 09:21 PM

I have a bicycle spedometer cateye vectra cc 7000, I would know if I can cut the cable and add a 2 mts extension to put in the car,
The manufacturer say imposible, but I try in my mountainbike and work ok, i dont know waht happen if I add 2 mts of cable.

austin man - 6/5/09 at 09:49 PM

Cant see there would be a problem its still only counting the revolutions of the wheel can you not fix it to the front wheel to save you needing to extend the cable ??

clairetoo - 6/5/09 at 09:53 PM

The only problem I have encountered with extending the wire's on push-bike speedo's is that some of them have a sort of conductive `string` rather than proper copper wire , which is allmost impossible to solder
Other than that - it works fine

Hellfire - 7/5/09 at 12:30 AM

quote:
Originally posted by clairetoo
The only problem I have encountered with extending the wire's on push-bike speedo's is that some of them have a sort of conductive `string` rather than proper copper wire , which is allmost impossible to solder
Other than that - it works fine


That would be Fibre Optic Cable then which is typically unsolderabubble...

Steve

Staple balls - 7/5/09 at 12:42 AM

quote:
Originally posted by clairetoo
The only problem I have encountered with extending the wire's on push-bike speedo's is that some of them have a sort of conductive `string` rather than proper copper wire , which is allmost impossible to solder
Other than that - it works fine


Possibly that weird nylon (I think) cored copper cable as used in cheap headphones?

Not impossible to solder, but not worth doing.

IME you're better off desoldering at both ends and replacing it with a twisted pair from some cat5 cable (which I often do with headphones, might well work with a bike speedo )

02GF74 - 7/5/09 at 06:45 AM

it is extremely possible - I have done this on mine = a Halfords bike speedo.

I cannot remember if I soldered the wires together - strip the insulation, twist wires together, blob of flux, apply heat and solder = job done - or used the small terminal blocks, probably the latter as the speedo was not meant to be a permanent feature.

MikeRJ - 7/5/09 at 07:42 AM

quote:
Originally posted by Hellfire
That would be Fibre Optic Cable then which is typically unsolderabubble...
Steve


It's "wire" in the sense that it's conductive, but not like traditional copper. The reason for it is that it's highly flexible and won't break under constant flexing like copper does.