Friday, February 3, 2012
More Than My Cup of Tea
Friday, January 27, 2012
What to Look for in 2012
Ultegra Di2
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The repairable spokes of Madfiber wheels |
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Cannondale's new Slice was ridden by some of Liquigas's top riders at some late season races. |
Tuesday, December 13, 2011
Ceramics
After all this, you can’t blame me for being slightly hesitant when ceramic bearing technology started to crop up in bicycles. If I am being absolutely honest, I thought that ceramic bearings were a total hoax until recently. Before we get into that, though, I think a crash course in bearing basics is in high order.
There is a plethora of articles that discuss all angles of bearing technology as it pertains to cycling all over the internet. So I will do my best to stick to the basics. These two articles from Zipp do a great job of explaining some of the merits of “good bearing design” so I will save my breath by not delving into radial contact vs. angular contact. Bearings are classified in two different ways: Grade, and ABEC rating. ABEC or Annular Bearing Engineering Committee ratings are used to classify the roundness of a ball bearing. A high ABEC rating means that the bearing has a lower eccentricity than a lower ABEC rating. These ratings are ideal for applications that require a smooth rolling bearing at extremely high RPMs. I’m talking like 30,000 RPMs. So unless you do your fast cadence drills at 30,000 RPMs, any rating of ABEC 5 or higher (9 is the highest) will do just fine. Cyclists often put too much emphasis on an ABEC rating. The real rating that effects cyclists is a bearing’s grade. Grade measures three things: surface integrity, size, and sphericity. What you need to know: the lower grade is better. A grade 2 or 3 bearing is ideal. A bearing’s manufacturing tolerances, however, are not the only cause of drag. Bearing seals and lubrication viscosity are major players in causing bearing drag.
So why does all this matter? How does ceramic technology come into play? Relax, I am about to tell you.
Si3N4 (Silicone Nitride) Ceramic bearings are not only lighter than standard steel bearings, but they are also stronger. Zipp claims a 30% weight savings and a 40% gain in overall strength. I haven’t seen the studies to confirm this, but Zipp is a technology driven company. They have loads of engineers doing complicated math problems with lots of numbers and decimals that I trust know more than I do about these kinds of things. I think it is safe to say though, that ceramic is a stronger lighter bearing material than steel. The savings in weight is negligible at best, but the gains in strength have major ramifications when it comes to rolling resistance. A stronger ball means that you can use a thinner (more viscous) lubrication and seals that cause less drag. This directly translates into a faster rolling bearing. Though the reduction in drag is mostly caused by low drag seals and high viscosity lubrication, these are only options because the ceramic ball is less susceptible to wear. If you were to use the same seals and lube with a steel ball, the life of the bearing would be drastically reduced—maybe even destroyed in a single ride.
Both steel and ceramic bearings can be manufactured to the same grade and rating, but that does not mean that they will perform the same over time. Besides the performance gains I already mentioned, a ceramic bearing will hold its grade longer. As a steel bearing wears, it will come out of round and small chips and imperfections will form on the surface on the bearing—both causing rolling resistance. Ceramic bearings are much harder than steel, meaning they will hold their form and resist chips and cracks for much longer than steel.
Like steel bearings, however, ceramic bearings are not all created equal. Actually, grade 25 bearings or higher don’t even have the right to vote in most states. When making a choice of bearings make sure you pay specific attention to grade, type of seal, and both viscosity and fill rate of the grease.
I know you are all asking, (silently in your head, I hope—because otherwise you would be talking to a computer…and everyone would be whispering about you) “All this technical jargon is well and good, but what good does all this do me out on the road? How much difference does it actually make?” I asked myself similar questions—it being a part of my inquisitive nature. Where’s the beef, so to speak? Well, the beef is in the pudding…or something like that. All the technical information and scientific studies in the world wouldn’t mean a thing unless it makes us enjoy riding our bikes more, right? That is why we love cycling—for the riding.
Here in the shop we recently had an opportunity to install ceramic hub bearings and derailleur pulleys on Thomas Brown’s Cyfac. Thomas is one of our favorite customers, so when he asked us to hook his bike up with some ceramic upgrades in addition to a full overhaul, we were really excited to dive into the project.
Believe it or not, derailleur pulleys are one of the leading causes of drag among drivetrains. A faster rolling set of derailleur pulleys will improve shifting, as well as greatly reduce drivetrain resistance. We replaced Tom’s old Campy pulleys (which are better than most standard pulleys to begin with), with Enduro Zero pulleys.


Shiney Enduro Zero Pulleys-The derailleur before the overhaul


---Disassembled----------Cleaned and ready to go!-
With the installation of the pulleys the drivetrain spun with very little resistance. With a spin of the pedal, the crank would rotate at least 3 full rotations. (spin your crank arms on your bike….they probably don’t go around 3 times). Before the conversion, Tom’s cranks spun about 361.7 degrees around. I measured it.
We also replaced old campy steel bearings and retainers with shiny black Si3N4 ceramic bearings with a synthetic retainer.


-Campy Ceramic Bearings---The hub before the conversion--
Notice that Campy recommends using only a light oil to lubricate the bearings.


-New bearings and oil-----------The finished product.----------
This allows for a drastic reduction in rolling resistance. I was thoroughly impressed when I took this bike out for a test ride. The Cyfac Nerv is a great riding bike to begin with, but I was totally struck at how smooth the bike rode after the conversion. It spun up smoothly and was very responsive. I immediately looked into ordering ceramics for my Caad9, but then I remembered that I’m completely broke. Oh well.
So what can we take from all of this?
Ceramic technology really does make a difference out on the road, but are a more expensive than standard steel bearings. So you have to ask yourself how much you are willing to spend for the top level of performance. We all have to decide between bike upgrades or say…donuts. For me the choice is obvious: donuts.
Thanks for reading. See you at the shop.
Scott
PS. I would love to hear any comments or suggestions for topics for the mechanical posts on this blog. This blog is yours just as much as it is mine—except for the fact that I write the posts. But I really do want to know what topics you are interested in discussing. Don’t hesitate to email me at sdevereaux@cadencecycling.com. Or leave your comments and suggestions in the “comments” section. Rocket science, right?
Additional Links and Pictures:
Ceramic Tech Information
Zipp Si3N4 Technology
F1 Ceramics explains grade and ABEC ratings
Mavic ZAP
Campagnolo Delta Brakes
Shimano Biopace
Tuesday, July 19, 2011
The Final Week

Mission accomplished...
Tour Director Christian Prudhomme wanted to create an exciting TOUR right from the start. Through his creativity and vision we have been able to sit back and enjoy daily excitement. The Tour de France is always a special event, but the "new" TDF is an exciting and unpredictable race. What no one was expecting was the multitude of crashes that have taken almost half the overall contenders out of the picture. Still, we can't put the burden of responsibility on the organization for this bad luck. It's the peloton, and when almost every rider there is dreaming of pinning on a number and making a name for himself, the risks are high.
The race has just left the Pyrenees and people are already talking about who is going to win. To be honest, we now know who the best climbers are and this particular talent will once again shape the final GC result. We’ve still got 6 riders in contention, but what people are REALLY talking about is Thomas Voeckler and team Europcar! Voeckler’s faithful lieutenant, Pierre Roland, is a stud and has been successful in past Tour's. But let's take a step back for a second and remember what took place late last fall with the almost total demise of Bbox Bouygues Telecom – which is now Voeckler’s Europcar team.
It’s late fall and BBox is on the verge of folding. Thomas Voeckler has multiple secure and high paying offers to leave but what does he do? He stands by his long time mentor and team director, Jean-René Bernaudeau and does not jump off the sinking ship. True, Voeckler raised the stress level pretty high for everyone by waiting till the bitter end to make his team decision, and he continually pushed back a meeting that was scheduled with Cofidis on the final day of the decision. But just before the deadline strikes which would have sent BBox – and all its riders – into the annals of history, Voelkler commits and the team signs a new contract with Europcar. The team is saved and the rest is history.
Talk about leadership! Wouldn't you ride yourself into the ground for a team leader like that?!! Europcar has created something special and all the money in the world can't buy this type of connection. Is good karma enough to hold on to the yellow jersey? In my heart, I sure hope so. Voeckler has the heart of a lion and who doesn't want an underdog to pull off the miracle. The numbers don't add up, but F#@% the numbers! He has the yellow jersey and he is not about to just give it away. He is riding above his capability and that is what champions do. Living in the moment, crushing it on the bike, and laughing and smiling when he’s done each day. He has nothing to lose.
Anyone could learn from Voeckler. Do you think he is looking at a power meter? I know he doesn't have one, but learn from this! A power meter has very little use in the middle of a stage race when you do whatever is necessary at any given moment. When you look at your powermeter after the fact, more often than not you’ll surprise yourself by blowing away your previous expectations. Live in the moment, execute your plan and see what the competition throws at you. I’ll admit, his ultimate chances are still small – but didn't a 40 year old win the Tour of California this year!?
OK back to the racing analysis…the TDF has not even entered the Alps and we now know who the best climbers are at the moment: Schleck x 2; Basso; Evans; Contador; and...Voeckler. The attrition doesn't lie. Some riders are better placed but these are the guys that are watching each other and making the moves at the critical times. Of course, Pierre Rolland is up there but since he is a domestique I have not included him in the mix. Even the greatest Tour rider of all time, Lance Armstrong called Rolland and Voelker out two days ago on Twitter…"He has 2:06 on Evans. Final TT is 42km. He's French. It's the Tour de France. He won't lose 2:06 in the final time trial assuming he keeps them close on Alpe d'Huez. His teammate Pierre Rolland has been a rock star and has to continue to be. Lastly, the dude knows how to suffer. Will be fun to watch."
There are two, possibly three, stages left in order for the blue chippers to take the yellow away from TV: Stage 17 into Italy on Pinerolo; and then the final big two - Stage 18 summit finish at Serre-Chevaller, and Stage 19 classic on the summit of Alpe-d'Huez. So far it's been cat and mouse with Evans, Basso, Contador and the Schlecks each nullifying each other’s attacks. This has played into the hands of TV as well as Evans. If this continues and Voelkler’s legs continue to surprise him, he will podium in Paris! Contador has a lot to make up and we'll see if Evans can continue his fine form.
At this moment in time, I give the edge to Evans since he really "only" (and do I use this term VERY loosely) needs to hang on and watch the others attack each other. Evans improved leg speed has allowed him to follow the accelerations of the Schleck's and Contador on the climbs, and that has been the main reason he is poised to make history next week. There is a week of exciting racing left and I'll be glued to the TV to see how the race unfolds. Enjoy it!
Coach Walton
Thursday, June 30, 2011

To get things started, this year I've created an initial rider ranking system to open up some discussions! In short, I weighed past results, athlete strengths, team support, and team goals. I've followed closely this year the results of the traditional build up races towards the Tour de France - the Giro, Dauphine, Suisse, and National Championships - and I've reminded myself of last year's Tour results. In the end, results don't lie, and they are the primary indicator of upcoming performance. Without real results, all we've got is a bunch of speculation.
Check out my PREDICTION SPREADSHEET. Each rider is rated on each category on a scale of one to five with 5 being the strongest score.
1. Climbing: Pretty straight forward. Natural ability. 125 pound power to weight freaks. The guys are ranked against each of the top riders.
2. Time Trialing: Again, pretty straight forward but I have weighed more heavily time trial performance during stage races. Again, ranking is against each of the contenders.
3. Peak, Progress and Goal: Who set out to peak for the Tour back in the beginning of the year and who is progressing or "peaking" according to plan? You may lose a half point if you were flying back in May - an indication of poor seasonal planning.
4. Team: Ranking of the strength of each rider's complete team. Climbers, team time trialists, roulleurs (able to sit on front of group and set tempo for 100km's), directors with strategic experience, etc.
5. Recovery: This ranking is a little more subjective than the rest. (Pun intended) I judged riders by their "bad days" in the Grand Tours, their results through the final days of stage races, results on back to back to back mountain stages, results the day after time trials, etc. I also look at rider technique and skill - how do they generate their power, how does their technique change in different performances? Ultimately, this category influences the race leaders more than anything else!
6. Past Life: Pretty simple, show me a resume! Who has done it in the past in the big ones!
7. X-Factor : See individual comments in my PREDICTION SPREADSHEET
It will be a nontraditional road race start this year and Tour Director Christian Prudhomme has made the first week eventful. The riders start by going over the Passage du Gois, an epic roadway that disappears under high tide! Stage Two is a 23km team time trial, followed by more stages through the heavy, punchy roads of Brittany. The Tour will not be won in the first week but it could be lost! Stay out of trouble and conserve as best you can is the goal for overall contenders through the first week. Look for Columbia to win the TTT over Garmin, and Cavendish to be in yellow early followed closely by the always-classy Gilbert. And for anyone who thinks that Contador will easily cruise to victory, keep in mind that the last time anyone pulled off the "double" (win the Giro and Tour in the same calendar year) was in 1998 by the late, great Marco Pantani. The deck is stacked against him.
Enjoy the race and my forthcoming commentary, and feel free to chime in with your own take, too!
Friday, June 17, 2011
What I've Learned
Thursday, April 7, 2011
Training with Allergies

1. Avoid peak pollen times. If you can stay inside between 10am and 4pm when pollen counts are highest and exercise during off peak hours or train indoors.
2. Take a shower. Pollen can accumulate in your hair and skin. If you take a shower before bed, you may find your sinuses are clearer and you sleep better.
3. Irrigate. Nasal irrigation is a part of daily routine's in India and Southeast Asia. Simply using nasal spray is a great deterrent.
4. Limit your dairy intake. Many doctors believe that dairy products increase mucus production which can agitate allergy symptoms.
5. Anti-inflammation diet. When you are suffering from allergies your nose is already inflamed. Avoid eating foods that will cause more inflammation such as sugar.