BTSyndrome

Thank you very much DJ

Doge

My 5 powertap GS meters shipped today.
I still think they are the best option for a college team where everyone has their own bike - and pedal system.

MercuryCycling will be doing the hoops and builds. They are in effect non rotating weight and at 320g pretty small gain. I'd still have to add a pound to a puppy build for UCI.

The LIMITs look cool and may also look at them, but as of now are single side and the increased Q-factor is difficult for some to deal with.

TheKillerPenguin

Powertap is great dude. Their customer service is top notch and they're basically bombproof. The only issue I have had is one of my hub transmitter caps went haywire, but powertap overnighted a new one to me free of charge.

Now that I have said that the torque tubes are probably going to explode...

Doge

Actually it is the caps that delayed them a week. Although they charged me on order 2 weeks ago (I think illegal). I think service is great and I talked to a real Wisconsininnn a couple times. I was on the phone today seeing if they would ship the hubs without caps, and caps later and the deal was ready to close when magically all parts were there and all shipping.

While precision is the most important thing (meaning many meters would do) PT is pretty accurate and I like it is at the end of the drive train. Many want to measure the athlete and like the pedals, but I'm more into the net power after loss. I know the loss is typically <10W, but it is just an emotional thing.

tetonrider

hey, all--just putting this in the power thread. i have some pretty deep connections inside SRM, and there are some super limited color options for their pc8 head unit.

if any of you have been considering a pc8 and/or want something that will be unique, shoot me a PM with your email addy and i can let you know what is up.

these are going to be super tight--not sure if they'll ever be publicly/widely advertised.

i think the pc8 is a great head unit, but it's not cheap and there are plenty of other good options (garmin, pioneer, etc) that have their strengths and weaknesses.

topflightpro

Holy crap. Teton said something kind about Garmin and Pioneer head units.

tetonrider

i've said plenty of good stuff. pretty much read every post and i note there are pros and cons of every meter and head unit. i take care to point that out.

Doge

Over what time is max power rated?

I don't follow power much, but as Puppy is remote and on a borrowed team bike - with power I became interested and sprung for the Premier Strava account (again). The 2014 weight was 135# age late 15 on his PT and current weight is 155# age 18 on borrowed bike. Strava set at 150# so not sure if both use that 150# number or the number at the time. I don't really trust the spike, but not sure it is wrong either. This was at the end of a very easy ride, while the 2014 was in the middle of a very hard one. Plan is to get into track so I *think* that short range power may matter more than the Brandon like 400W TT power.

globecanvas

Not sure what that question means.

I think Strava w/kg always uses the current rider weight setting, which is one of several reasons why Strava is not so useful for training management.

I wouldn't.

Flatballer

Considering it's a power meter he's never used before, a single spike of 2000W, at 150 lbs, is pretty suspect.

Ygduf

the other being that it similarly always uses the current ftp. it's essentially garbage for a pmc.

Doge

If someone says "My Max power is 1,000W." What are they saying? That they hit that, held it for 5 sec or what?

What software also records weight at the time?

globecanvas

You'd have to ask the sayer. Probably most people would mean 1 second power if they said that, but 1 second power is often garbage data and also not so useful in any context.


Every other power-based performance management software that I can think of. WKO, Golden Cheetah, Cycling Analytics, etc.

Doge

I was wondering what this meant.

globecanvas

I think it means just as much as eating 21 energy gels and a deep fried turkey.

shovelhd

To me peak power would be the highest number ever hit in one sample of the power meter. Since power meters don't sample at the same rate, one second is a common denominator.

Wylde06

tetonrider

what power meter?

basically, when people state their max power they are referencing whatever sounds best -- a power spike in a ride, or a number they hit fresh, in a parking lot. it's often a sample that included some botched data, like a cadence spike that was timed in a weird way.

this is an issue for pretty much all power meters; some are worse than others, particularly ones that estimate (power tap) or calculate (any using an accelerometer instead of a magnet) cadence. 1 data sample is a problem for every meter, though.

5" max power is more interesting, but with wireless meters it, too, can be WAY off. i've explained this--earlier in this thread.

tetonrider

sorry--just now saw this was 2014 data in the graph--i thought you were referencing the 2014 PT in the text but there was a new meter involved.

yeah, PT 1" power---do not trust at all.

Doge

Well I don't know. He has locally a power tap. And will again. Right now - just it shows he has a meter.
I attribute it to nothing other than late teen T cycle, but a little late for junior racing.

furiousferret

Right now I can hit close to 1500 watts; that's what it says as peak power on my garmin. I know its around there based on other reads, and the times when I hit the jump perfectly it feels like the whole side of my body is transferring energy into my legs.

The problem with this ewang is twofold; The follow up stroke is a major drop in power; I'd rather have lower numbers and be more consistent on my 2-10 strokes. Secondly, I'm 25 pounds overweight, and at 45 tsb; in race shape I lose 200-300 of that. Right now there's no way I can keep up in a crit.

Doge

https://journals.lww.com/acsm-msse/pa...&type=abstract

topflightpro

First, that study is 12 years old, which means it's probably worthless given the rate at which technology changes.

Second, I'd like to know who funded the study.

Doge

Never-mind.

Who makes the most precise (repeatable) PMs? Is SRM the best all around? Seems PT is good. The picture has the new GS unit.

shovelhd

They all have their advantages and disadvantages. They all have their issues and service problems.