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Stupid PSA of the Day

Old 03-22-12, 07:32 AM
  #1  
Trailblazer3
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Stupid PSA of the Day

During your routine maintenance, I would highly recommend swapping out your zip ties on your Garmin Speed/Cadence sensor regularly. Don't have what happened to me; sensor wiggled loose and did a divebomb for my spokes. The end result was a busted speed sensor (although cadence still works) and a couple bent spokes. Made it home fine, but damn do I feel stupid. A $.02 set of zip ties will now cost me a trip to the LBS. I've been religious in the past about swapping them monthly, just got out of sync with my upkeep routine.
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Old 03-22-12, 07:35 AM
  #2  
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I didn't use the stock zip ties.. I have pro grade metal tooth zip ties for the magnet on the crank and the two on the chain stay... for that suspected reason... now proven. I change them out every few months just in case.
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Old 03-22-12, 10:15 AM
  #3  
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Originally Posted by Trailblazer3 View Post
During your routine maintenance, I would highly recommend swapping out your zip ties on your Garmin Speed/Cadence sensor regularly. Don't have what happened to me; sensor wiggled loose and did a divebomb for my spokes. The end result was a busted speed sensor (although cadence still works) and a couple bent spokes. Made it home fine, but damn do I feel stupid. A $.02 set of zip ties will now cost me a trip to the LBS. I've been religious in the past about swapping them monthly, just got out of sync with my upkeep routine.
That sounds so unbelievably extreme to me.
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Old 03-22-12, 10:25 AM
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No wonder it came loose - you keep messing with it. There are no stresses on the attachment. Set it and forget it...
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Old 03-22-12, 10:35 AM
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Originally Posted by JamieElenbaas View Post
No wonder it came loose - you keep messing with it. There are no stresses on the attachment. Set it and forget it...
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Old 03-22-12, 10:38 AM
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OK, this is the reason I want to install my speed sensor upside down... if you flip that little arm up, any mis alignment towards the wheel will do exactly what you just experienced. Upside down? It just starts clicking against the spokes, no biggie.

Is there any way to use the cadence sensor but NOT the speed sensor? I could care less about the wheel magnet, the GPS speed is fine for me, and that little arm is perilously close to the spokes.
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Old 03-22-12, 10:39 AM
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Originally Posted by JamieElenbaas View Post
No wonder it came loose - you keep messing with it. There are no stresses on the attachment. Set it and forget it...
+1. Never really would have thought this would even be a concern. Not a garmin (are they huge or something), but mine get swapped out when the battery dies and I have to pull the sensor to put a new one in. Well that was my last sensor. Current one is wired so it hasn't been touched in 2 years.
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Old 03-22-12, 10:51 AM
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Originally Posted by JamieElenbaas View Post
No wonder it came loose - you keep messing with it. There are no stresses on the attachment. Set it and forget it...
I go by what my cable ties tell me. After about a month or so of use, they seem to loosen slightly, so I swap. The time that I don't, this happens. If anything it proves my point. I "set it and forgot it" and cost me $60 for a new sensor and wheel true. I'm trying to save someone else from potentially having the same issue. Could be the shape of my chainstay that it can't quite get as tight or something, I dunno.
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Old 03-22-12, 12:42 PM
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hmmmm...I'm in the "zip it and forget it" camp. One sensor has been attached with the same zip ties for 3 years. It would make sense that they'd get brittle in the sun and the heat.
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Old 03-22-12, 06:46 PM
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The trick it good zip ties, not cheap or thin ones that will stretch.

My sensor was on for ~20k miles without moving a bit.
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Old 03-22-12, 07:08 PM
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Originally Posted by TrojanHorse View Post
OK, this is the reason I want to leave that crap off my bike.
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Old 03-23-12, 06:50 AM
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Do you park your bike in the sun or something? Monthly change of zip ties seems extreme. Also, you can gain some added securrity by using strong double sided tape when you mount the sensor.
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Old 03-23-12, 07:12 AM
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Monthly zip tie changeouts?

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Old 03-23-12, 07:20 AM
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Guess I never thought of this to be an issue. I didn't use the cheap zips that came with it. I used pretty heavy duty ones. I will take a look at mine to see how secure it is, but even still every month seems OCD.
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Old 03-23-12, 09:16 AM
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Maybe monthly is OCD, but it kept me out of the situation. My bike it outside a lot, but not so much that I would expect it to be an issue. I'm going to try a new batch of zip ties as well to see if it helps. Maybe mine are just crap.
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Old 03-23-12, 11:20 AM
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I swap out the zip ties on my bike every season when I do my normal cable change and the like. Cheap enough that I just go for it, never had one break yet.
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Old 03-23-12, 06:12 PM
  #17  
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check yo ZIPZ!
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Old 03-24-12, 06:20 PM
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Put a little piece of double sided thin foam tape or a little blob of hot glue under it with or without zip ties. But tht said, I've never had, nor can I imagine why a zip tie that is just holding a sensor on a bike frame would fail. There's no stress.
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