Doge

How was that measured? Blood prick every time or did they leave a spot open?
That is Watts 1st column I assume. Did you have HR with that?

Ygduf

finger prick every damn time. here's the sheet, core temp, HR, power

https://docs.google.com/spreadsheets...thkey=CNGh1JoL

Doge

Thanks for that. I had just plotted your numbers to see the graph. Got to add the HR to the graph. With the dip in lactate at 225W and 250W wondering about that. Measurement inaccuracy or body catching up. High VO2 - have you changed since training?

What lab did this? I doubt my son will sign up for the figure pricking. Hoping this will be out soon.
https://www.facebook.com/BSXathletics
https://www.bicycleretailer.com/product-tech/2014/10/20/new-device-offers-non-invasive-lactate-level-testing-athletes#.ViOcczZdGM9

Ygduf

that data is from a test at the Stanford Human Performance Lab. My first and last volunteering for a test. It was miserable. I haven't had vO2 tested since, so no idea. I imagine I use more (my power is much higher now) o2 but the KG are higher too.

The best part was having to swallow the core thermometer, which was a long strand of plastic that you swallow and the lead hangs out your mouth... while you test. Not very comfortable. Then as the blood is tested you get your finger pricked every 3 minutes. I have bad circulation, so sometimes they had to try multiple fingers. I looked like ET at the end, with the tips of my fingers swollen and red.

I did a series of like 4 or 5 1-hour sessions, so 20 finger ****** each time doing a threshold TT on an ill-fitting computrainer stationary bike in a room without AC or a fan (they were testing core temp vs. some things). The pools of sweat were epic, and disgusting. My sweat rate was measured at 5lbs/hour.

I'd be interested in a test for my own curiosity now, but like most numbers they don't really do much so I haven't sought it out. You don't get a plaque for your vO2 number or LT power.

(also in regards to that vO2 number, I swear the apparatus was not allowing me to get the full volume of air. There was resistance on the inhalation through the 1-way valves that I wasn't expecting. I imagine I could have improved that number immediately if I had done vO2 testing a couple of times in a row and gotten acclimated to the process. But vO2 unfortunately was only in the first test as they selected candidates to continue into the other rounds)

Doge

Numbers are what USAC selects juniors from and what colleges use to select rowers. Winning races is nice - numbers are what they use to select.

echappist

i'd agree with selection based off of number with the caveats being that a) unless the rider is picked for ITT abilities, the rider should also possess adequate bike handling skills and b) the selection should be less focused on VO2max values alone as those are great predictors for IP efforts but have less predictive power for efforts of longer duration.

Ygduf

I gathered that from your first posts. I'm not in consideration for USAC Juniors, unfortunately, though I guess I do have all my college years of eligibility left! Let them know!

tetonrider

if it is anything like the moxy, it is very sensitive to placement. (i see that device is designed for the calf whereas the moxy can be used anywhere...and gives different results based on where it is placed.)

IOW, while convenient, non-invasive, and neat in that it can be used in the field, it may not yield the same quality of results as a lab test.

topflightpro

I participated in a similar study a couple years ago, but without the blood tests. My internal temp was taken with a disposable pill that emitted a signal to a device held against my body. At some point, I pooped it out, or at least I assume I did. Who knows, it may still be in there.

And the VO2 test was awful. By the end, I felt like I was drowning trying to breathe through that apparatus.

hack

digging this up for follow up ....

Has this setup been good for Jr? Also, which of the outboard options did you go with:

Outboard basic $74
Outboard angle contact (what is that??) $94
Outboard ceramic $125
Outboard ceramic zero $175

Thx

Doge

Outboard Ceramic (bro deal). Actually just getting new ceramic bearings in it now - bike at shop (best way to keep him off it). New bearings in the $50 range.
Yea - we think it is better. It is gut level thinking. Next year bike comes with a Specialized BB30 and we will likely pay to put a Shimano setup on it. I'm not 100% yet on that.

I was very disappointed the DuraAce rings came apart mid-race, but overall we think they are hard to beat (we buy them when others do not cost us).

hack

Thanks ... looking to setup my Venge with a GXP so I can run my quarq. Seems like the Praxis setup is good, but limits you if you ever need to change bearings.

TheKillerPenguin

I've thought about doing that. I've gone through 4 pairs of bb30 bearings this year :-|

Doge

What the shop says is that Praxis expands in the middle and for the Venge - that is bad.

spectastic

brought it to a shop. they didn't see anything wrong with it. I took a closer look, and it seems like the extra rubbing is happening closer to where the stem is. perhaps that's just because there's extra mass there, because I can feel the extra weight of the stem when I rotate the wheel by itself.

tetonrider

something's wrong....

revchuck 

BB30 is what's wrong. (Says the guy with two bikes with BB30...)

A friend just replaced the creaking factory-installed BB/PF30 bearings in his Peter Sagan-replica Venge with a Praxis BB. The original bearings had <500 miles. He got the idea from my bike, an Allez Comp Race that came stock with the Praxis BB and makes nary a sound. I know there's potentially a difference due to carbon vs. aluminum BBs. We just installed it today, it will be interesting to see if it's as quiet as mine. BTW, installation was WAY easier than standard bearings.

hack

Local shop has a couple new Venges on display with the new super wide Rovals. Funky looking cockpit, but the wheels look sharp.

Dunbar

I saw one last week at my local shop. They sure look weird with a stack of those aero spacers under the stem.

Duke of Kent

I'm using a PF30 TorqTite from Enduro on my PF30 bike now.

Same AC/Ceramic bearings as my BB30 setup, but in a threaded aluminum shell.

Dead silent, great bearing life.

And, I'm guessing my MTBs see much worse conditions than any and all road bikes in this forum.

globecanvas

I don't quite understand how those things work. It looks like it is a metal shell that holds the BB30 bearings outside the frame rather than inside? Doesn't that add ~20mm to the BB width? How can the existing crank spindle be long enough? Obviously some lack of knowledge on my part.

TheKillerPenguin

#1 & 2 were due to hellacious winter, the second one so bad the bearing galvanized to the axle and had to be cracked off, #3 due to a wicked hard crash, #4 due to mileage. I don't dislike bb30, it's just a pain in the ass to replace the bearings.

Duke of Kent

N

No. It replaces standard PF30 BBs, which are nylon or metal sleeves that simply press into the frame. They can move around, though, which can cause creaking.

The TorqTite and similar models thread together. You basically bolt each half to an interior sleeve. Once on, no movement, no sound.

globecanvas

Ah, I get it. I see they also make adapters from BB30 to wider-shell BBs like Shimano. I thought it was just one product they made, that somehow converted BB30 to some sort of external BB30, didn't get it.

Doge

It is not any of the ambient conditions that cause trouble. It is the hose jet spray at the BB and in the seat post. For some reason, the mechanics are into soap and water. I can go years on my stuff with no issues - I don't spray them, but leave my son's (several) bikes with a mechanic and they come back clean and trashed.