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Old 12-26-13, 08:58 PM   #5501
Racer Ex 
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Did not see this before hopping on the rollers today, but going by HR and RPE I ended up doing my SST intervals almost exactly 15 watts higher. Good call.
Just think if you bumped it 30.
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Old 12-27-13, 05:16 AM   #5502
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Just think if you bumped it 30.
That's an even better call. Wesley, bump 30 and report back. Some video would be nice.
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Old 12-27-13, 06:11 AM   #5503
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That would be pretty close to threshold (unless the top-of-my-head math is dodgy). 2x20 at not-quite-threshold is not that cray-cray, is it?

Don't get me wrong, my first race is not until April, don't have threshold intervals on the agenda quite yet, but I am not sure the video would be that entertaining.
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Old 12-27-13, 06:59 PM   #5504
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Sigh. Did my first FTP test maybe 2 weeks ago and knew it was off/low (had a cold/poor route etc etc) but as my first test I figured it would work as a crude estimate for base until I test again in 6 weeks. Well, it is too low, I did a simply route today and my heart rate was 75% tempo 20%endurance(so easy ride) and I averaged 22watts more than my FTP estimate GRRRR got to retest
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Old 12-27-13, 08:59 PM   #5505
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Trust me, Wesley, it would be entertaining.
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Old 12-27-13, 10:35 PM   #5506
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... I averaged 22watts more than my FTP estimate GRRRR got to retest
"wahhh! my threshold is SO much higher than i thought. wahhh!"

just kiddin'. maybe your meter is off! i kid, i kid.

view it as a privilege to retest. hell, you'll see an improvement from your first second to your second test, let alone doing it sick vs healthy.
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Old 12-28-13, 10:08 AM   #5507
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As I've mentioned elsewhere, I'm on my second Stages. The first one cracked (the meter/pod part, not the crankarm). They overnighted a replacement. It was on my cross bike which I abuse the crap out of, it probably cracked on a rock. I have continued to abuse the second Stages (cross rides, cross races, water/sand/salt/slush/snow/zero degrees etc) for a few months, no troubles yet. The crack probably counts as a design flaw, though, the plastic surrounding the battery cover is not very substantial. But if you don't do technical singletrack it's probably fine.

I think they are an iteration or two away from being a great unit, but even so, considering the cost and the customer service, I am a satisfied customer and would buy another one.

Just relating my experiences, not recommending or unrecommending anything to anyone.
4 hour ride in steady rain last Monday. PM functioned just fine during the ride. Didn't ride for a few days. Friday the PM was dead. Opened the battery cover and it was wet in there. (The o-ring was installed properly and greased.) Dried it out with a paper towel and replaced the battery, still dead. Left the battery cover off overnight and pointed a small fan at it. Now it seems to be working again.

These units seem to be hydrophilic. I won't be using it in the rain again, or if I have to I may try wrapping it with tape or something. Needless to say, sensitivity to weather does reduce the utility of the power meter.

I love the versatility and low-budget-ness of the unit quite a bit. I swap the meter between three bikes that have the same crankset, but three different chainring setups, two different rear hub spacings, and two different types of pedals. There's no other unit that could cover all three use cases, and it just takes about a minute to swap. I sincerely hope they get through this initial period of working out their design problems.

Last edited by globecanvas; 12-28-13 at 10:14 AM.
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Old 12-28-13, 11:44 AM   #5508
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Silicone calk around the outside of the battery cover, and just take it out with a pick when it's time to change the battery? PITA, and obviously an extra step, but if you're only changing the battery a couple times a year it might be worth it.
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Old 12-28-13, 12:22 PM   #5509
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Dear Mr. globecanvas;

We received your Stages power meter for service. We notice that there's been silicone use around the battery cover which voids your warranty.

If we can be of further assistance please let us know.

Sincerely yours,


Bob
Stages Customer Service
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Old 12-28-13, 03:27 PM   #5510
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Wrapping it in tape would probably help, but to be honest the simplest solution is just not to use it in the rain.
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Old 12-28-13, 04:48 PM   #5511
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Did a 20 minute test today..picked up a few watts from my initial test in October
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Old 12-28-13, 05:54 PM   #5512
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That would be pretty close to threshold (unless the top-of-my-head math is dodgy). 2x20 at not-quite-threshold is not that cray-cray, is it?

Don't get me wrong, my first race is not until April, don't have threshold intervals on the agenda quite yet, but I am not sure the video would be that entertaining.
So the (good) craziness continues. 2x20 SST intervals today, went by PE and HR and let power take care of itself. The second interval my avg power was my highest 20 min power ever, 10 watts over my previously tested FTP, HR stayed solidly z3. 15 watts higher than Thursday's SST intervals. Feeling turbocharged.
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Old 12-29-13, 12:27 AM   #5513
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4 hour ride in steady rain last Monday. PM functioned just fine during the ride. Didn't ride for a few days. Friday the PM was dead. Opened the battery cover and it was wet in there.
at least the battery is easily replaced? bah-dum-bum.

seriously, though, sorry you have to deal with this. you sound like a rider who would never let the elements get int he way of a good ride, so not being able to use a device you paid for all the time is a bummer.
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Old 12-29-13, 06:35 AM   #5514
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Wrapping it in tape would probably help, but to be honest the simplest solution is just not to use it in the rain.

I'd have the thing for years before I found out its limiter was a lack of waterproofing. For all I know my SRMs have the same issue.
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Old 12-29-13, 07:46 AM   #5515
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I was talking a local racer last weekend who was using Stages and he's gone through 3 of them. All failed with water in the battery compartment. The last replacement he sold without using....

I was thinking of getting one, but with those limitations I'm out. I already had the joy of dealing with a Quarq S975 that had a fear of cold wet weather.
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Old 12-29-13, 08:56 AM   #5516
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Wrapping it in tape would probably help, but to be honest the simplest solution is just not to use it in the rain.
Wouldn't wrapping it in tape decrease accuracy? Since the Stages works by measuring the flex in the crank arm, you'd think wrapping the whole thing in tape would add rigidity and therefore confuse the sensors. It may be a minuscule amount and not really matter... I'm curious what other's think.
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Old 12-29-13, 09:02 AM   #5517
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Wouldn't wrapping it in tape decrease accuracy? Since the Stages works by measuring the flex in the crank arm, you'd think wrapping the whole thing in tape would add rigidity and therefore confuse the sensors. It may be a minuscule amount and not really matter... I'm curious what other's think.
Gots an idea. Next race remove your stem bolts and tape your bars in place. You can use whatever kind of tape you want.
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Old 12-29-13, 09:47 AM   #5518
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Gots an idea. Next race remove your stem bolts and tape your bars in place. You can use whatever kind of tape you want.
I never said it would add enough rigidity to add strength, and certainly not enough to replace fixing bolts. But when something is measuring minute changes in flex, wrapping that something in tape "might" change the rigidity enough to show a measurable difference.

Also, note the question marks in my previous post. I'm not claiming to know anything about this subject. And the "I'm curious what others think" was a call out to those who might know. No need to be a jerk.
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Old 12-29-13, 09:52 AM   #5519
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That's what I think. I'm sorry if that's not to your liking.
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Old 12-29-13, 10:10 AM   #5520
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I very seriously doubt that wrapping an aluminum crankarm in electrical tape would affect its rigidity.

On the plus side, I rode this morning, knowing that rain was in the forecast, and when it started raining 15 minutes from home it was a great motivator to finish the ride strong.
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Old 12-29-13, 10:13 AM   #5521
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use this stuff and deduct 10% from your numbers



In all seriousness if putting a piece of tape changed the numbers on a PM it wouldn't seem to be stable enough to have much use. Imagine if your foot brushed the crank arm?
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Old 12-29-13, 12:10 PM   #5522
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I'd have the thing for years before I found out its limiter was a lack of waterproofing. For all I know my SRMs have the same issue.
They don't.
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Old 12-29-13, 12:26 PM   #5523
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use this stuff and deduct 10% from your numbers



In all seriousness if putting a piece of tape changed the numbers on a PM it wouldn't seem to be stable enough to have much use. Imagine if your foot brushed the crank arm?
not to mention that a zero offset should zero out the added force put on the strain gauges as presumably, the tape is so damn strong that it'll be exerting the force through out the ride...
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Old 12-29-13, 01:06 PM   #5524
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the tape is so damn strong that it'll be exerting the force through out the ride...
We have that tape riding for our team next year. We sent in an license application for Gorilla Tape and USAC upgraded it to Cat 3 based on its results in Canuckistan.
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Old 12-29-13, 01:13 PM   #5525
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Gorilla Tape is made by extruding strips of skin off Andre Greipel's thighs. Little known fact.
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