Broken PAS disc

Lhoytt

New Member
Hi, I have a 2019 Rad Rover. I went to use my bike and found the PAS disc broken into several pieces (see photo)
242B019D-9FDC-44F0-AE8A-55E6BDEA4823.jpeg
. I
I Googled this part and found a bunch on line, some of which come in two pieces that can’t wait installed without removing the crank and chain ring. Does anyone have experience with this and is there a 2 piece PAS disc that would be compatible? Mine has 12 magnets.

Thanks for the help!

larry
 

Timpo

Well-Known Member
So your question is that, what two piece PAS sensor you can use? Because you don't want to take off the crank?

I think anything that look similar to that would work, and if the diameter is slightly different, I imagine you could move the sensor as well.
 

Lhoytt

New Member
So your question is that, what two piece PAS sensor you can use? Because you don't want to take off the crank?

I think anything that look similar to that would work, and if the diameter is slightly different, I imagine you could move the sensor as well.

Thank you Timpo. Yes, If I can install a PAS disc without removing the crank and chain ring I can do it myself. If I need to remove the crank. I need to have a bike mechanic do it.

Do you, or anyone else on the forum, have a reliable source for the disc?

Thanks,

Larry
 

Timpo

Well-Known Member
Thank you Timpo. Yes, If I can install a PAS disc without removing the crank and chain ring I can do it myself. If I need to remove the crank. I need to have a bike mechanic do it.

Do you, or anyone else on the forum, have a reliable source for the disc?

Thanks,

Larry
My "go to" place for ebike parts has always been AliExpress.
But I have to warn you, AliExpress isn't the fastest way to get stuff since they're in China.

Removing a crank only takes 20 seconds.

You just need to have a crank remover tool.
Instead of paying bike mechanic for that labor, maybe buy a crank remover so that you have another tool in your tool collection?

 

Timpo

Well-Known Member
Ok I just did a quick research, looks like Rad Power shows you how to change the PAS sensor.



Now I am unsure if you can use 2 piece sensor.
I was thinking that, the magnet sensor would look like this.
JS-PAS-Pedal-Assist-Sensor-For-Electric-Bicycle-Parts-12-Magnet-PAS-Sensor-Electric-Bike-Accessories.jpg_q50.jpg


but looks more like this
s-l300.jpg
 

Lhoytt

New Member
The bottom photo you sent looks exactly like it; however, I am wondering if the 2-piece disc could substitute for the broken 1-piece. Unfortunately Rad tech support hasn’t responded to me yet so I can find out what I can use.

Is this a Rad bike problem, or a common problem with E bikes?

Larry
 

Timpo

Well-Known Member
The bottom photo you sent looks exactly like it; however, I am wondering if the 2-piece disc could substitute for the broken 1-piece. Unfortunately Rad tech support hasn’t responded to me yet so I can find out what I can use.

Is this a Rad bike problem, or a common problem with E bikes?

Larry
There is no way Rad Power would tell you to go buy a sensor from somewhere else. They will always try to sell their products, just like any company.

I don't know if it's a common problem with Rad Power.
Maybe you can ask on Rad Power Forum?
 

AHicks

Well-Known Member
Region
USA
City
Snow Bird - Summer S.E. Michigan, Winter Gulf Coast North Central Fl.
A search on Amazon may yield the part your after (PAS sensor).

I think the frequency that disc is broken will have a lot to do with the terrain you ride. They are generally fine until whacked with something.

And being the avid DIY'er that I am, I would second the idea of purchasing any tools required vs. paying a tech to do it. I would fully understand though, that somebody with no tools, or a place to work on it, might just want to have it done for them.
 

harryS

Well-Known Member
Best to buy a rad sensor and get the same disk. Not a good idea to mix magnets and sensors from different vendors, especially if you're farming it out to a bike tech who doesn't work on ebikes. Buy the rad part, you know it works.

A cheap generic sensor will probably work, because they are simple, but there's only 1 way out of 4 of installing it right (disk can be flipped, and sensor may be pointed the wrong way). In addition, if you're changing the sensor, the connector may not be the same , and no one tells you what wires are what.


.
 
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AHicks

Well-Known Member
Region
USA
City
Snow Bird - Summer S.E. Michigan, Winter Gulf Coast North Central Fl.
Not going to disagree regarding the Rad part being the easiest. Little doubt there.

What wires are what not hard if you decide to take on the project. On the bike side, positive and negative easily found with a volt meter, the other is the sensor. The new PAS sensor should come with documentation telling you what is what. Too, you may not need to replace the sensor if you can match up the ring.

Magnet orientation can be a pain.... require some patience.
 

harryS

Well-Known Member

AHicks

Well-Known Member
Region
USA
City
Snow Bird - Summer S.E. Michigan, Winter Gulf Coast North Central Fl.
My hope would be you wouldn't have to replace the sensor - just the magnet ring.