I have recently bought new wheels and this seems to of affested the accuracy of my computer. The magnet is placed near where the spokes cross, approx 8.5cm from centre of wheel, 26in wheel.
i have tried the cat eye site and that is no help. any ideas?
Ps- its a velo8 if that makes a difference
2007-02-04 01:49:04 · 7 answers · asked by the egg of bed 2 in Sports ➔ Cycling
Where you place the magnet won't affect your speedo reading.
Your new rim/tyre is probably a little different in circumference. if you measure one revolution with you on the bike and program that into the computer you will be sweet again.
Here is some figures for 26" wheels that are pretty close
26x 2.35 ........ 2083
26x 2.125........2070
26x 2.1............2068
26x 2.0............2055
26x 1.9............2050
26 x 1.75.........2023
26 x 1.75.........1985
26 x 1.0...........1913
26x 1.0 (559 mm)..1952
26x 1 3/8 (650 c)....2068
It makes little difference where you place your magnet. But if you want the best spot let your wheel swing back and forward the heaviest point will wind up at the bottom. hang your magnet opposite this and it will help balance your wheel. Keep it close to the hub if you want to accelerate. or closer to the rim if you cruise at high speed (assuming this gets the wheel balanced). Again this makes little difference, but a fanatic likes to do it right.
2007-02-04 12:52:05 · answer #1 · answered by Glenn B 7 · 0⤊ 0⤋
Cats Eye Bike Computer
2016-10-31 22:18:20 · answer #2 · answered by ashworth 4 · 0⤊ 0⤋
As i just installed a velo 8 on my bike yesterday this may help, the centre of the magnet should line up with the marking line and the magnet and sensor should have approximately a 5mm gap between them, If you have changed to thinner wheels this may be where your problem is. Distance from the centre and wheel size will make no differnce and according to the instructions as long as the instructions i have just given are correct then you should have no problem, If so try moving the magnet and sensor up or down to alter the gap between them. If you still have no luck then it may be that the battery has almost run out and therefore it will not have enough power to work properly, Hope this helps.
2007-02-05 00:57:45 · answer #3 · answered by mbenn60 2 · 0⤊ 0⤋
The accuracy is not affected by how far from the center of the wheel the magnet is located provided that the sensor is picking up the signal. The magnet still goes around the same number of times regardless of its location on a spoke.
The Pros usually put their magnets close to the rim and their sensor high on the fork, choice necessitated by the need to change wheels easily. The sensible person would mount the magnet as close to the hub as possible so the weight of the magnet adds as little to rotating mass. Just to illustrate, a pound of weight added to a wheel is equivalent to 4 pounds added to a bike frame.
Since bike magnets are small and have neglible weight, it is your choice where you mount it. Just make sure that the sensor can reliably pick up the signal.
2007-02-04 02:26:44 · answer #4 · answered by Ben P 4 · 1⤊ 0⤋
Where you place the magnet on the wheel makes no difference. You need to program the computer for how much distance the wheel travels in each revolution.
2007-02-04 02:14:03 · answer #5 · answered by mrknositall 6 · 0⤊ 1⤋
i have an Enduro8 and the directions say to place the magnet 5mm away from the sensor. try that. my magnet attaches right where the spokes cross. any farther down and the disc brake would block the signal.
2007-02-05 06:04:03 · answer #6 · answered by Anonymous · 0⤊ 0⤋
put it as low as you can get it on your spoke and still have adequate clearance for the pickup
2007-02-04 05:41:52 · answer #7 · answered by (_)iiiiD 4 · 1⤊ 2⤋