Compatibility of PAS from different suppliers

[Minusnine]

Hi everyone, I have just fitted a woosh xf08 rear hub kit to my bike. The process went well except that the pedal assist sensor was too thick so we weren’t able to retain the original bottom bracket when fitting the sensor, and the longer bottom bracket we had to use has of course meant I can’t use the outer ring on the chainset, meaning I am rather under geared. (The 34t middle ring is now where the derailleur expects the 46t outer ring to be). Plan B is to just fit a bigger middle ring and run it as a 1x, but...

I see that a thinner (2-3mm) pedal assist sensor is available from yosepower (https://yosepower.com/products/pas-sensor) that looks like it would fit and has the same connector - would there be any reason I couldn’t use that sensor instead of the one in the woosh kit, if it enabled me to retain the original bottom bracket and triple chainset?

 

[Woosh]

can you post a picture of the current pedal sensor so we can see where the problem is?

 

[Minusnine]

can you post a picture of the current pedal sensor so we can see where the problem is?

thanks, here’s a comparison with the original sensor in place and the thinner one next to it.

 

[Woosh]

I can see that the inner face of the left crank touches the left side pedal sensor.
Your solution would work. The alternative is to file off the inner face of the left crank about 2mm to create a small gap.

 

[vfr400]

You can comfortably file or grind 3mm off the inboard face of the pedal arm to create more clearance.

 

[Minusnine]

Thanks both, I'll have a go with the old BB and pick up the file if necessary

 

[Nealh]

If you have to go down the thinner PAS disc route then any 3 wire one will be fine as long as the wire sequence is the same, if the connector is a Yellow Julet then wire sequence is standard.