Neater/Simpler way to install the pedal sensor?

[Unseen]

For my troubles my bike is fitted with the ISIS BB so needed the magnetdisc with a the much larger hole, been playing with cable ties to get it to sit centrally but frankly it looks pants! (Ok bright yellow cable ties were never going to hide well!)

Without the cable ties it does "appear" to hold itself quite well magnetically to the granny cog but I'm guessing cable tie is recommended to ensure it stays where you want it? How do every one else do theirs? (Without the suggestion to change the BB please ) I did think of maybe using bigger cable ties to create an anchor on the granny gear and thinner ones drilled through... But like everything I've been procrastinating on trying to get it perfect so getting no where fast!

 

[anotherkiwi]

There are black cable ties in the shops you know... Looks fine except you can't use the granny gear any more.

 

[Woosh]

you make a loop around the spokes of the inner ring, then cabletie the round metal clip to the loop. Like this:

 

[Vagos]

Or you can throw the cable ties and just drill two small holes on the plastic disc and bolt it to the cog. It would be easier if the holes you drill match any existing holes on the cog. If not, maybe drill the cog also?

 

[D C]

You could also fit a larger granny ring so you could still use it.
Dave.

 

[atheo]

I got rid of the small cog,only use the large one,and used jb weld on the disc in its place.

 

[Unseen]

you make a loop around the spokes of the inner ring, then cabletie the round metal clip to the loop. Like this:

I was going to imitate this as that's in your instructions But it's loosing that granny gear that keeps bothering me as trust me with my luck at the minute even though it has 17ah I will do the 9 mile route to work and halfway back end up out of juice... (Says the guy stuck in work waiting for support callback! See nice weather and I'm in work!!)

 

[Unseen]

Or you can throw the cable ties and just drill two small holes on the plastic disc and bolt it to the cog. It would be easier if the holes you drill match any existing holes on the cog. If not, maybe drill the cog also?

I'll give that a look... Plenty of spare nuts and bolts, just hope there's a matching hole!

 

[Woosh]

Without the cable ties it does "appear" to hold itself quite well magnetically to the granny cog but I'm guessing cable tie is recommended to ensure it stays where you want it?

that's correct. You only need one or two cableties to be sure that the disc rotates with the cranks because the ring is already centered.

 

[Nealh]

I use 3 of the methods mentioned.
On Boardman 700c cable tied, on Norco 700c magnetism & mtb is bolted.

 

[Alan Lowery]

I had a problem with the magnet reluctor ring slipping on the crank, or moving sideways away from the sensor. I squared it up and used hot melt glue. Works a treat

 

[Unseen]

I had a problem with the magnet reluctor ring slipping on the crank, or moving sideways away from the sensor. I squared it up and used hot melt glue. Works a treat

Of all the things I've got to hand in one way or another, we don't have one of those!!! But I think I've sussed it now with a better use of cable ties but I may go down the epoxy/glue route if it slips.

Now all that's left is to try and make a tidy job of the cabling. Thanks for all the handy tips!

 

[Hightechpete]

Why don't you just glue individual magnets directly to the 'granny gear'?. If it works with hot melt glue, do a proper job with epoxy or JB weld.