Computer installation
#1
I descend on my face
Thread Starter
Join Date: Aug 2003
Location: The Land of Milk and Hoppy.
Posts: 93
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Computer installation
I picked up a Cateye Mity 8 for my fixie, but I noticed in the directions it has no place where it specifies how far from the center of the wheel it should be. Do I just put it anywhere and it figures out where the sensor is on the wheel?
Also, has anyone used the Mity vs. the Enduro? I have the Mity on my cross bike, but I was thinking I might want the beefier cord of the Enduro for the street. Anyone damage their cord before?
Also, has anyone used the Mity vs. the Enduro? I have the Mity on my cross bike, but I was thinking I might want the beefier cord of the Enduro for the street. Anyone damage their cord before?
#4
Senior Member
Join Date: Jun 2003
Posts: 18,138
Bikes: 2 many
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 1266 Post(s)
Liked 323 Times
in
169 Posts
Originally Posted by Twitchology
Oh right because you put in wheel size.
I'm a genius, really.
I'm a genius, really.
That's not the first time I've heard that, nor will it be the last.
#5
Banned.
Join Date: Sep 2003
Location: Home alone
Posts: 6,017
Bikes: Trek 4300 X 2. Trek 1000, Trek 6000
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
I put my sensor as near to the hub as possible. I think I read that suggestion on Sheldon's site. Then my LBS decided to raise it up one day for no apparent reason. I guess they didn't like it that way.
#7
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 643 Times
in
364 Posts
The only thing that the sensor does is to count wheel revolutions. The hub turns exactly the same number of times as the rim so height doesn't make any difference.
The biggest single problem with computers is getting the pick up the right distance from the magnet. Since the spokes angle inward from the hub flange to the rim, mounting close to the hub might put the magnet too close to the fork and mounting near the rim might move the magnet too far away.
I guess that technically you'll get less polar enertia by mounting the magnet close to the hub, but that force won't be enough that you'll ever feel it. If you have a large frame size, you might not have enough wire to do a neat installation if you try to mount the pickup too low on the fork.
I always try to mount the pickup in front of the fork. That way, if you ever bend something so that the magnet hits the pickup, the wheel rotation will just knock the pickup out of the way rather than jam it into the spokes.
The biggest single problem with computers is getting the pick up the right distance from the magnet. Since the spokes angle inward from the hub flange to the rim, mounting close to the hub might put the magnet too close to the fork and mounting near the rim might move the magnet too far away.
I guess that technically you'll get less polar enertia by mounting the magnet close to the hub, but that force won't be enough that you'll ever feel it. If you have a large frame size, you might not have enough wire to do a neat installation if you try to mount the pickup too low on the fork.
I always try to mount the pickup in front of the fork. That way, if you ever bend something so that the magnet hits the pickup, the wheel rotation will just knock the pickup out of the way rather than jam it into the spokes.
#8
cab horn
Join Date: Jun 2004
Location: Toronto
Posts: 28,353
Bikes: 1987 Bianchi Campione
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Likes: 0
Liked 25 Times
in
18 Posts
Yeah but you forget sheldons reasoning for putting it nearer to the hub.
Originally Posted by Sheldon Brown
The closer in you mount it, the more slowly it will pass by the sensor, giving the sensor's magnetic switch more time to respond. If the magnet is too far out, the computer may give erratic readings at higher speeds.
#9
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 643 Times
in
364 Posts
Originally Posted by operator
Yeah but you forget sheldons reasoning for putting it nearer to the hub.
#10
MudLover
Join Date: Nov 2004
Location: Melbourne, Australia
Posts: 56
Bikes: Giant AC 2005, Custom BMX(no 2 parts from same brand) and no-name (but reliable) duallie
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by Twitchology
I picked up a Cateye Mity 8 for my fixie, but I noticed in the directions it has no place where it specifies how far from the center of the wheel it should be. Do I just put it anywhere and it figures out where the sensor is on the wheel?
Also, has anyone used the Mity vs. the Enduro? I have the Mity on my cross bike, but I was thinking I might want the beefier cord of the Enduro for the street. Anyone damage their cord before?
Also, has anyone used the Mity vs. the Enduro? I have the Mity on my cross bike, but I was thinking I might want the beefier cord of the Enduro for the street. Anyone damage their cord before?
i also have the Mity 8. I bought it 3 days ago (Saturday). It says in the manual that the magnet must be within 5mm of the little black receiver thingy. On my bike ('05 Giant AC), the closer the magnet and reciever were to the hub, the less clearance there was between the two, so yes, I'd say that the magnet should be installed close to the hub for stronger magnet impulses (thats how the computer determines speed etc.).
Hope it helped
#11
Senior Member
Join Date: Jun 2003
Posts: 18,138
Bikes: 2 many
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 1266 Post(s)
Liked 323 Times
in
169 Posts
Originally Posted by da_empire04
i also have the Mity 8. I bought it 3 days ago (Saturday). It says in the manual that the magnet must be within 5mm of the little black receiver thingy. On my bike ('05 Giant AC), the closer the magnet and reciever were to the hub, the less clearance there was between the two, so yes, I'd say that the magnet should be installed close to the hub for stronger magnet impulses (thats how the computer determines speed etc.).
Hope it helped
Hope it helped
You can't generalize and say all computers should have the sensors close or far from the hub. The different brands and even models of the same brand have magnets and sensors that stick out or are closer to the spokes or the fork. And the forks are different and so are the wheels. Fortunately the distance from the center of the wheel means absolutely nothing to the computer. Some bikes must have the magnet and the sensor almost against the rim to have the magnet/sensor gap correct.
You just have to put them where the gap is correct from the magnet to the sensor. Period.
#12
Stercus accidit
Join Date: Mar 2005
Location: Dallas/Fort Worth
Posts: 686
Bikes: Trek Pilot 2.1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
If you have a wireless sensor and you place it close to the hub as Sheldon advises, the transmitter may be too far away from the receiver to work. My hybrid has a wireless computer and I have the sensor mounted high on the fork which is the only way it will work. On one large hill near my house I routinely get the bike as fast as 35 mph and have never noticed any erratic readings at those speeds.