A bicycle odometer or speedometer consist of the Computer LCD Display, Cadence Sensor and a Magnet that is attached to the spoke of bicycle wheel.
If you lost the original magnet or for some reasons the original magnet doesn’t quite fit, our neodymium magnets together with a little 3M adhesive may solve the problem.
Our customer Evelyn shared with us how she replace her Cateye speedometer original magnet with a piece of Titan Magnetics 20x10x3mm block neodymium magnets that looks better than the original!
Why not use the original magnet? (Shown here)
As shown in the photos below, the original magnet is unable to fit the unique spoke of her wheel.
We were concern that the harsh outdoor environment and speed may flung the magnet right off.
Hence being a true kiasu Singaporean, she applied 3M Adhesion Promoter (3M 94 Primer itself is not a glue or adhesive) on the small area where the 3M adhesive will hold the magnet.
The Process
First the area was cleaned once with a cloth and then with a alcohol pad to ensure it is perfectly cleaned, no oil or unwanted residue.
A thin coating of 3M 94 Primer was applied and left to dry for 5 minutes before sticking on the block magnet with 3M Foam Double Sided Adhesive tape.
Firm pressure was applied for 30secs to ensure a good initial bond. the magnet bonded by adhesive was left overnight so that the 3M adhesive substrates have sufficient time to flow and “wet out” and achieve bonding at the microscopic level.
A quick test of the 20x10x3mm block magnet from Titan Magnetics before sticking it to the wheel with 3M VHB Acrylic Foam Adhesive.
(This is the same 3M VHB Foam adhesive used on our Dia. 20x2mm Neodymium Magnets with 3M VHB Adhesive )
After 1 week of testing to ensure the replacement magnet works and stay firmly in place during rides, she sent us the following photo showing the completed replacement block neodymium magnet held by 3M adhesive and insured with 3M 94 Adhesion Promoter Primer!
I think it’s way neater than the original magnet.
