Which PAS sensor for octalink?

blu joe

Finding my (electric) wheels
Oct 6, 2023
17
-1
I have a trek fx 7.5 that i electrified with a 17 amp KT controller and front hub motor. I am having difficulties getting the correct pas that will fit and work, which model pas sensor do i need?
 

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blu joe

Finding my (electric) wheels
Oct 6, 2023
17
-1
My bottom bracket is an octalink, maybe hollotech as i removed the crank arm before and could see right through the bottom bracket, bike is trek 7.5 fx with standard bottom bracket (pics attached in my posts)
 

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blu joe

Finding my (electric) wheels
Oct 6, 2023
17
-1
Octalink cranks are wider than the standard square taper, i believe.
 

matthewslack

Esteemed Pedelecer
Nov 26, 2021
1,623
1,207
I can't offer direct experience, but when I Google pas sensor octalink I think there is enough there to find the answer, including a list of previous threads on here, and products specifically mentioning hollowtech, and known supplier names such as psppower.

Screenshot_20240212-092833_Chrome.jpg
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
20,124
8,224
60
West Sx RH
Octalink or Hollowtech ?
One will need a differing type of PAS to fit each BB.

Hollowtech or the similar sram gxp type will need a BZ10C type PAS , octalink will need a PAS as indicated in #3.

The difference being the BZ10C PAS ring has the over sized inner diameter to go over the outer bearing casing.