I own a set of HED3s. The previous owner glued a magnet on the wheel to work with cyclometer. The problem is that the magnet is positioned too high (too far away from the hub) to line up with my fork-mounted wireless sensor.
I can’t move my sensor any higher on the fork, because the fork widens near the top and is too wide for the o-ring that came with the sensor to mount it. I’ve looked at the hardware store for a wider o-ring, but could not find anything. I’d like to fix this for a race Saturday.
What’s the easiest way to remove the magnet from the carbon without damaging the wheel or the clear coat? Or may someone has another idea.
Not sure of the best way to remove the magnet, but you could just add another magnet that aligns with your sensor. I have H3's and just wrapped a tie wrap around the front hub, pulled tight and left about 2.5" of the nylon wrap, and connected the magnet to that. It's worked good for years, though I'm sure it's not ST aero approved.
I use epoxy over zip ties on my bikes. When I removed my magnet from my Hed 3C I stabbed a sharp but firm small pocket knife blade (exacto knife blade not strong enough) into the epoxy only just at the base of the magnet and twist gently as I tried to crack it off with my fingers. Once the epoxy seal is brokefrom the carbon, it comes of easily. The residual epoxy (or glue) needs to be taken off with the exacto knife blade. Don’t touch the carbon. Make sure your blade is only in the glue and slightly twist and you will see the glue release. It is like surgery but if done correctly (taking your time) you can’t even tell a magnet was glued there.
Glue? U R kidding me? Go to Home Depot, get a $2.50 tube of clear silicone bath/tub/tile caulk. Then get a “rare earth magnet” (look it up), put a drop of the caulk on the carbon spoke, press the rare earth magnet into the center of the caulk, let it dry LEVEL over night. The strength of a rare earth magnet will “jump” across any gap even if using a flat disc like a ZIPP. If you want to take the magnet off, just peel the whole thing off…viola…no mess, no damage to your expensive wheels, and you’re golden. Been doing this for years with no issues, and no void to the warranty (because you can’t tell there was actually anything there in the first place).
That’s why I recommend ShoeGoo for securing magnets. It’s still hard to remove from carbon fiber surfaces but it’s doable. Silicone is probably even easier to remove.
That’s why I recommend ShoeGoo for securing magnets. It’s still hard to remove from carbon fiber surfaces but it’s doable. Silicone is probably even easier to remove.
Very easy…peels off like those gobs of glue that you get in magazines with tiny catalogs glued somewhere in the middle. The big key here when using disc wheels is a magnet strong enough to jump that gap from the chain stay pick-up to the magnet. Most magnets aren’t that strong from bike computers, that’s why the “rare earth magnets” work so well.