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For reference: http://www.premierholding.org/pages/quality-control
Also: those images need to be significantly bigger (or the ability to maximize them would be nice)
And here's the page from the Ero report with me on the Tactical
I'm all about athletes MASTERING triathlon
Twitter - @TriCoachIan
Here I am counting off laps for Ray. Not an awful position, but he's just a big dude with elbows rather far apart and he catches a lot of wind.
Here is a link to Ray's article if you'd like to read more.
Jim reported the baseline average Cda for the PremierBike Tactical including rider was .2949 and the average for the Felt IA was .3079 for a difference of 0.013.
He also says that 0.013 equals 10.7 watt savings and would save a rider 3.86 minutes in a 180K bike leg.
So my question is if the Cda for the PremierBike Tactical was .237 and the Felt IA was .25 (same 0.013 difference) would the outcome still be the same?
Tactical would still be 10.7 watts savings and save the athlete 3.86 minutes in the bike leg?
Does the rider size change the outcome of the results if the goal of the test is to compare two bikes?
These are the same protocols that allowed me to estimate Luke McKenzie's Kone split from 2013 to within 43 seconds of his actual time, and Heather Jackson to within 7 seconds of her last Wildflower split. From this year, I knew Amber Neben (who I fit, tested in the tunnel and tested again using the Alphamantis system on 3 consecutive days) should've been about 30 seconds ahead of Kristin Armstrong at US Nationals, and if I'm not mistaken she beat her by 28 seconds (and would have easily won
gold in Rio).
On this board, I constantly see people overestimating (or underestimating) their CdA. People are much higher than they want to believe. We see very few triathletes below .25 when they come in. Very few. They might leave lower, but they come in way high, and most need a decent bike fit far more than they need an aero test. Bike Fit, good bike fit, has been lost to marketing. It's now about selling product, not about optimal performance.
These tests were not about the riders position, they were about testing a product. Ian was excellent for that. His was very consistent, which is what we need. What the athletes CdA is, whether high or low, means nothing to me.
Jim Manton / ERO Sports
Aero Tidbits posted on Instagram & Facebook
that position didn't look too pedestrian to me. looking at the pics from the article, that was a LOT of drop, and it looks like a pretty low position on the pic of him riding.
i think ian's saddle height on his tri bike is about 80cm. he's not a small guy. he's a rather broad shouldered surfer dude who took up tri. how big is ray? that p3 seemed like a fairly middlin' size, looking at the head tube.
The Premier obviously tests well, which was the point.
That being said, the above statement means nothing when testing the Premier Tactical.
ah. okay. i thought you were mostly referring to his position, and when looking at the pics of his bike (when he's off) and when he's riding, the position didn't look too pedestrian.
i think jim manton and james haycraft are saying basically the same thing (my take) which is that the absolute numbers mean nothing, only the relative numbers. it seems (i could be wrong) that the wind tunnel testing and the alphamantis testing agree, the tactical is a little faster than the IA when not in a yaw (tho on a velodrome i'm not quite sure what yaw is during turns).
Apologies if this is covered elsewhere. Please address the protocol for using your optimized race chain:
Meaning, what do you recommend for optimal performance pre-race, race-day and post-race?
If you have not used the Connex link before (you will love it) just make sure its on in the right direct. If you hear a click noise in the small cog - its on backward. I put a short video, made by Connex, in the You Tube channel found on the bottom of the website main page.
Training Days - just ride the bike.
Race Day - if you have not used the chain prior to the race just ride the bike on the trainer for 5 minutes on the small cog. It will quickly get silky smooth.
The Wax/PTFE/MSO2 is really good at keeping the chain clean.
Post Race - If you're on roads that are dry and clean just wipe the exterior and apply your favorite lube as usual.
If the roads are super gritty, sandy etc..the Connex link makes taking the chain "off and on" a breeze; literally 20 seconds. In this case the better job you do cleaning and applying lube the better.
likewise chains, just the other way around.
It may not have the details you're looking for, but this thread from a couple of years ago provided a lot of info about testing at ERO: http://forum.slowtwitch.com/forum/Slowtwitch_Forums_C1/Triathlon_Forum_F1/Ask_us_anything_about_Aero_Camp__P4943130/
I intend to keep a fresh chain "race ready"; swapping out the training chain/cassette prior to major races. Vice-Versa afterwards; back to the training set up. Any thoughts on that approach?
A few follow ups:
~What treatment do you recommend for the rest of the drivetrain prior to installing a fresh chain? Are mineral spirits necessary?
~How do freshly treated chains perform in wet conditions?
~What type of longevity can we expect from the wax coating?
~Can the chains be re-coated?
likewise chains, just the other way around.
A connex chain is one of the best triathlon investments I've ever made. My protocol for my packing my Speed Concept is:
-undo connex link
-unplug Di2 from rear derailleur
-remove rear derailleur
-remove brake fairings
-pull brake wedges
-unplug wires from front junction box to shifters
-unscrew three screws attaching pedestal/aerobars to stem
-take my wheels off
That might sound like a lot to the uninitiated but, for an integrated super bike, it's a revelatory process. I can do all of that and have my bike packed in about 10 minutes at this point. Was the connex chain a "game changer"? No, but it was part of the cumulative marginal gains that progressively made the process easier. I'm probably going to buy Premier's bike case as well and then use JB weld to hold the t-nuts in place on the Speed Concept's riser so that way I never have to fiddle with unscrewing the basebar.