Lezyne cadence magnet does not fit
#1
Member
Thread Starter
Join Date: Oct 2012
Posts: 31
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Lezyne cadence magnet does not fit
Dear Bike Forums Users,
I bought a Lezyne cadence and speed sensor. Regarding speed, no problems (I don't mean that I am very fast - I mean that I successfully installed the magnet at the right distance from the sensor).
Regarding cadence, though, the magnet does not fit. I mean, the gap between the crank arm and the chainstay is so small that the magnet does not fit.
My question is: does anybody know the specs of that magnet? I can buy a smaller magnet with similar specs and glue it to the crank arm...
Or, if anybody had a similar problem, any ideas how to solve it?
Huge thanks in advance!
I bought a Lezyne cadence and speed sensor. Regarding speed, no problems (I don't mean that I am very fast - I mean that I successfully installed the magnet at the right distance from the sensor).
Regarding cadence, though, the magnet does not fit. I mean, the gap between the crank arm and the chainstay is so small that the magnet does not fit.
My question is: does anybody know the specs of that magnet? I can buy a smaller magnet with similar specs and glue it to the crank arm...
Or, if anybody had a similar problem, any ideas how to solve it?
Huge thanks in advance!
#2
Senior Member
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,547
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18350 Post(s)
Liked 4,502 Times
in
3,346 Posts
There is no need for the magnet/sensor to be at the end of the crank. It can go somewhere in the middle.
If you want to epoxy it in place, then you can pick up a small Neodymium disc magnet off of E-Bay for cheap.
If you want to epoxy it in place, then you can pick up a small Neodymium disc magnet off of E-Bay for cheap.
#3
Member
Thread Starter
Join Date: Oct 2012
Posts: 31
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Thanks Clifford!
The problem is, I don't have a ton of room if I want the sensor to overlap with the rear wheel to measure speed as well.
I guess I'll buy a cheap magnet then and McGiver it to the crank arm. Will ANY magnet work? Does it even matter if I flip North and South pole?
I guess I will give it a try :-)
Thanks again!
The problem is, I don't have a ton of room if I want the sensor to overlap with the rear wheel to measure speed as well.
I guess I'll buy a cheap magnet then and McGiver it to the crank arm. Will ANY magnet work? Does it even matter if I flip North and South pole?
I guess I will give it a try :-)
Thanks again!
#4
Junior Member
I had the same problem. A small (1/2" diameter) rare earth magnet stuck to the pedal shaft did the trick.
#5
Senior Member
Join Date: May 2008
Location: Zang's Spur, CO
Posts: 9,080
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 3370 Post(s)
Liked 5,491 Times
in
2,844 Posts
I switched all my bikes to using Neodymium magnets stuck to the pedal spindle years ago.
Of course the pedal spindle needs to be steel, (and not titanium).
And if the gap happens to be too large, you can just stack 2 or 3 to close the distance.
#9
aka Tom Reingold
Join Date: Jan 2009
Location: New York, NY, and High Falls, NY, USA
Posts: 40,498
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
Mentioned: 511 Post(s)
Tagged: 0 Thread(s)
Quoted: 7345 Post(s)
Liked 2,450 Times
in
1,429 Posts
Yes, any magnet is likely to work.
__________________
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
#10
Senior Member
And for just this reason - the alignment of magnets with pickups - I got rid of all my magnet based sensors a couple of years ago. The dual sensors that provide one pickup for both the wheel and the cranks are the absolute worst too. I don't know how Lezyne computers work with sensors, but if you can can go to the sensors without the external magnets, then do it. The aggravation you leave behind is worth the hit to the pocketbook.
j.
j.
Thread
Thread Starter
Forum
Replies
Last Post
GiantTCR
Electronics, Lighting, & Gadgets
5
07-23-15 11:00 AM
bigredkevbot
Bicycle Mechanics
7
01-20-15 12:07 PM