Spoke Magnet Pole Orientation

[Mentalist]

My magnet flew out of the spoke housing.

i tested a magnet I’m about to mount, north and south pole facing the speed sensor…both sides register speed.
does the the side of the magnet facing the speed sensor even matter?

 

[PedalUma]

My magnet flew out of the spoke housing.

i tested a magnet I’m about to mount, north and south pole facing the speed sensor…both sides register speed.
does the the side of the magnet facing the speed sensor even matter?

I think that it matters because it maters with cadence sensors. More about that soon. I just did a test by spinning stacked wheel magnets. North faces the pickup. Okay, now about the cadence sensors. A guy had a bucking bronco bike. It was really weird. It turns out some of the magnets had been reversed. I diagnosed and repaired it.

 

[Mentalist]

I think that it matters because it maters with cadence sensors. More about that soon. I just did a test by spinning stacked wheel magnets. North faces the pickup. Okay, now about the cadence sensors. A guy had a bucking bronco bike. It was really weird. It turns out some of the magnets had been reversed. I diagnosed and repaired it.

I ordered a Bosch spoke magnet and will say which way the magnet is facing..

but for now I stuck a magnet in the existing spoke housing. I tried both faces and they both registered on the display..

you’re saying to face north toward the sensor right? I’m surprised there’s no info I googled heavy and found nothing about faces of magnet and magnetic speed sensors

 

[PedalUma]

Actually, I remove the magnet and speed sensor from 90% of my builds. Yes N to the sensor is correct. This is exactly what a superior electric bike looks like. The idea is that you sip coffee while passing $9400 bikes on a climb with guys in Spandex. Yes, it is electric. And here is a 'girl's' bike that blows away bikes from stores. Does it even look clunky?

 

[fooferdoggie]

on the bosch you don't have a choice but I doubt it matters since your just needing a magnets pull.

 

[fooferdoggie]

Actually, I remove the magnet and speed sensor from 90% of my builds. Yes N to the sensor is correct. This is exactly what a superior electric bike looks like. The idea is that you sip coffee while passing $9400 bikes on a climb with guys in Spandex. Yes, it is electric. And here is a 'girl's' bike that blows away bikes from stores. Does it even look clunky?

ya ya got to post bikes you build in every post?

 

[PedalUma]

ya ya got to post bikes you build in every post?

I show a few select ones sometimes because if you don't have a photo, it didn't happen. Is there a problem with those bikes? I am currently working on a $120 bike. Should I show it or not?

 

[fooferdoggie]

I show a few select ones sometimes because if you don't have a photo, it didn't happen. Is there a problem with those bikes? I am currently working on a $120 bike. Should I show it or not?

more than once in awhile but when it is taking over the tread then its just bragging or whatever. I mean what does that bike have to do with a magnet on the wheel??

 

[PedalUma]

I don't use them and have a ton. And helped him figure out which why it goes. It is what a bike looks like without unneeded stuff like a wheel magnet.

 

[Mentalist]

I don't use them and have a ton. And helped him figure out which why it goes. It is what a bike looks like without unneeded stuff like a wheel magnet.

Ay lay off the drugs

 

[AHicks]

Actually, I remove the magnet and speed sensor from 90% of my builds. Yes N to the sensor is correct. This is exactly what a superior electric bike looks like. The idea is that you sip coffee while passing $9400 bikes on a climb with guys in Spandex. Yes, it is electric. And here is a 'girl's' bike that blows away bikes from stores. Does it even look clunky?

Can we discuss why you remove (don't use?) the magnet and speed sensor? Is it because you aren't running speedometer/odometers on your builds?

 

[PedalUma]

Can we discuss why you remove (don't use?) the magnet and speed sensor? Is it because you aren't running speedometer/odometers on your builds?

Now that OP's issue has been addressed, I will answer your question and get back to finishing the $120 bike. By accident! Four-years-ago I made a bike that had very narrow chain stays. I couldn't fit the wheel magnet pickup. So, screw it, I just made it without the wheel magnet and pickup. Then a year later I had the brilliant idea that I could modify a pickup housing to make it fit. It worked. And it made the bike lag, have no feel, and surge but in a whippy way. I abandoned that ride at 1.5K because it sucked so bad. Now the OD will forever read 3K and that bike is my go to bike for about three rides per day. Since then I have not installed them unless I do a throttle bike which requires speed data to function. I learn best from accidental screwups and I make more screwups per day than most. Back to finishing the $120 '96 Gary Fisher.

 

[AHicks]

So to answer MY question, if equipped, speedo and odo are not functional on your builds without a magnet and pick up, correct?

Bottom line, I guess I'm wondering if you are doing something else that will generate a speed signal, or going without?

 

[PedalUma]

So to answer MY question, if equipped, speedo and odo are not functional on your builds without a magnet and pick up, correct?

Bottom line, I guess I'm wondering if you are doing something else that will generate a speed signal, or going without?

I found out that I do not need a speedo or Od. I have a good idea of what gear I am in and how fast I am pedaling. Just like a pianist does not look at his fingers, I don't squint at my shifter to know what gear I am in and I don't need to squint at a speedo to know how fast I am going. I would much more like a bike that is super responsive and give up those unneeded functions. I just finished the $120 bike. I know, no photo or it didn't happen. All it needs is a little air and it is ready to go.

 

[PedalUma]

I cheated.

 

[Mentalist]

If someone later finds this. The magnet pole direction doesn’t matter. I tested it both sides and it worked the same. The sensor picks up the magnetic field either way

 

[PedalUma]

If someone later finds this. The magnet pole direction doesn’t matter. I tested it both sides and it worked the same. The sensor picks up the magnetic field either way

That is good science! Thank you. It is good to know that a speed sensor is unlike a cadence sensor. I would think they were more similar.

 

[Kayakguy]

If someone later finds this. The magnet pole direction doesn’t matter. I tested it both sides and it worked the same. The sensor picks up the magnetic field either way

When I first got my Ariel Rider C class (in 2020), the display wouldn't show speed or odo miles. Turning the magnet end-for-end fixed that. Unless it has a + on one end or side, I don't know how to recognize N from S on a magnet, unless I have a way to test it.

 

[Mentalist]

When I first got my Ariel Rider C class (in 2020), the display wouldn't show speed or odo miles. Turning the magnet end-for-end fixed that. Unless it has a + on one end or side, I don't know how to recognize N from S on a magnet, unless I have a way to test it.

There is no + or - I used a magnet from amazon with a pack that had a lot of magnets of different sizes. I have ocd so I tried both sides it was being picked up either way, but the magnets are quite strong. Sensor is some bafang sensor

its this pack https://www.amazon.com/DIYMAG-Small-Refrigerator-Magnets-MIX100/dp/B09HGZZYK1