Is My Trainer Broken?

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2014-12-09 10:48 PM


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Subject: Is My Trainer Broken?
So I'm getting on my Mag trainer yesterday, and the usual whirring is this horrible grinding sound (can post video). Sounds like I'm trying to start a lawnmower. I figure something's a little loose or aligned funny, but I keep spinning. As I keep ramping up the gears, though, it just feels way too easy. Finally, I'm in my highest gear, spinning 90 RPM... and pushing 150 watts.

Gotta be busted, right? It's not that old-- it's actually the third resistance unit that CycleOps has sent me, and I've only had this particular one for a little over a year.

2014-12-10 6:50 AM
in reply to: runningmon


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Subject: RE: Is My Trainer Broken?
I have an old Minoura Mag trainer where this has happened several times. I am guessing your magnets are rubbing against each other. The tire contact roller and the magnetic plates may be held in place on a shaft by hex set screws. Over time and especially if you rock the bike in the trainer, maybe while standing up, the set screws will loosen and eventually the mag plates will contact each other. It should be an easy fix but you may need to play with plate spacing a litte to get the proper resistance.

Hope this helps.
2014-12-10 10:27 AM
in reply to: spalek

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Subject: RE: Is My Trainer Broken?
My final and last ever magnetic trainer did that. It sounded like a chain saw. The roller had a bit of up and down movement so I figured the bearings were shot so I upgraded to a Cyclops Fluid trainer and couldnt be happier.
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