Fitting a PAS Sensor to the crank - how ?

[Tubamanandy]

Anyone know how easy/hard it is to fit a PAS sensor to the crank ?

I've got one to fit but unsure if there are any special things you need to watch for or even how to do it to be honest.

Any help appreciated

 

[Nealh]

Which type of bottom bracket is fitted to your bike ? Sq taper , octalink etc,etc and which type of pas sensor are you fitting.

 

[Tubamanandy]

Urgh, really not sure. It's a mountain bike if that helps

 

[Nealh]

You need to take a close up pic of the crank/ bottom bracket and show us , take one from the LHS.

 

[Tubamanandy]

Here it is

 

[Nealh]

Can't really tell from that pic and angle, might have to remove crank arm and retake pic.

 

[Nealh]

This pas uses a stick on type of adjustable sensor that is also cable tied.
The magnet ring centre is drill out and fitted in place of the small drive, granny ring.


This pas sensor is the type that is fitted to a stainless bracket that fits over /behind the bottom bracket shell and the magnet ring is as the other one above.

 

[Tubamanandy]

They both look like they are on the crank side?

 

[Alan Quay]

From the pic I'd guess you have a square taper. Remove the left crank arm (non drive side), put sensor behind BB retaining ring, magnet ring on crank shaft, refit crank arm. Simples.

 

[Tubamanandy]

Thanks Alan and Nealh

 

[Yamdude]

Loads of vids on Youtube, that'll show you how to do it better than someone can explain it in words.

 

[Nealh]

They both look like they are on the crank side?

Yes they are, out of sight almost and can't be knocked or damaged easily.

 

[Tubamanandy]

I understand the theory now & fitment