Sunday, November 24, 2013

New Wheels - Functional, Stylistic, Aeroodynamic

Reynolds 81mm laced to White T11 - (20) DT Aerolite Spokes - 1010 g
A very deep profile for the rear wheel increases the drag coefficient of a bicycle to help it slip through the wind faster. Carbon fiber is the best material for this type of application because it is so much lighter than aluminum and allows for more extreme shape design to give it improved aerodynamic properties. This rim shape is possible with aluminum but would come with a huge weight penalty - which is why you never see it.


Super deep rim has the advantages of a disc wheel for time trial and triathlon, but is lighter and more maneuverable and versatile across other road riding disciplines thanks to Reynolds' patented SLG technology and offers better braking than it's competitor's with their CTG brake track.
White Industries is a small machine shop in Petaluma, CA that has been manufacturing highest quality USA made hubs, cogs, cranks, and pedals since 1978. The craftsmanship is impeccable and extremely durable and lightweight. Titanium freehub body is 11 speed compatible on their T11 hub for a seamless transition to Shimano and SRAM's latest componentry, while still compatible with 9 and 10 speed drivetrains. I've been using this hub on the majority of my wheel builds since it was released last year. This is a hub that you hold on to and use from bike to bike for years. $275 for the rear hub is cheaper than King and DT and weighs just 252 g.        

For questions and dream wheel consultations, please contact me here...gene_ruiterATcycleloftdotcom- thanks

Next up.... wider is better......and how?...HED Belgium Powertap G3 rear wheel / HED Belgium DT 350 front wheel

-Gene

Tuesday, November 19, 2013

Upgrading wheels to improve your bicycle's performance


Many cyclist look for performance advantages within their equipment. It is widely accepted in the cycling community that  lighter, more aerodynamic wheels can make a bike feel faster. The difference is so dramatic that it is immediately noticeable compared with any other upgrade.

There are several considerations to make when selecting the right wheels for your bike. Keep in Mind the following questions when choosing a wheel set:

What type of riding do you do? Aggressive sprinter, svelte climber, rolleur,  randonneuring, or off road etc… The right rim, spoke count and lacing pattern, as well as hub quality can make a world of difference when built  for a specific type of riding and wheels can be built to excel across several disciplines.

Most of us want a wheel that can do it all. But hold on, there has to be a compromise, right?

Are you looking for a wheel that is durable, light, aerodynamic, or all three?  The answer to this question is– how much do you want to spend? (Which is also a question, unfortunately.) There is always a compromise that can be made when it comes to cost.  Even the most budget conscious rider can get on a wheel that is aerodynamic and stiff.  A general rule of thumb is the lighter the wheel set, typically the more it will cost.  But weight isn't everything when it comes to fast wheels. An aerodynamic wheel that has greater rotational mass than a light weight climbing wheel will be fast because it sustains it's inertia better once it is up to speed. Therefore, making it a fast wheel at a given speed over 22 mph for example. Given an individual budget, all three characteristics are within reach.  Performance aluminum wheels range in price from around $400-$1500.  Wheels built using carbon rims range in price starting at $1,000 up to $6,000.  Finding the right wheels with the characteristic you’re looking for doesn’t have to cost an arm and a leg. There is a way to get the additional speed you’re looking for even with an affordable pair of wheels.

How much do you weigh?  Rider weight has a large bearing on the performance of any given wheel.  A wheel that is stiff and durable for a rider that weighs 140 lbs may not be stiff or strong enough for a 190 lb. rider.  Specific spoke counts and lacing patterns, hub design, rim styles and weight all affect the characteristics of a wheel.

So how do you know what will work best for a specific application or all around riding? Experience is the definitive answer but I will clarify the type of components that make a good wheel for a specific rider in the upcoming posts. Stay tuned. Knowledge is power. Power is speed. Speed is fun.
 
-Gene

Thursday, November 14, 2013

Gene, Gene made a machine...

Hi there, My name is Gene and I've been an employee at Cycle Loft since 2007. I know it sounds like I'm opening up at a meeting, but I assure you I don't have a problem. A few years ago Jeff started a blog for the shop and other outlying interests of the shop. It has lost some momentum since it's inception and Jeff approached me about breathing some new life into it. I gave up writing for a living after falling in love with cycling. It's a good thing because it's always paid the bills. I've been a mechanic for 15 years or so and specialize in custom wheel building so I like to talk about wheels a lot. Throughout this blog you'll find some technical articles about bicycles and specifically, wheel products, the physics of cycling, and anything going on in the shop mixed in with some humor. Not too much though, as we are very serious about our part time amateur bloggership. You may just  find yourself encountering interesting articles such as this:

http://physics.ucsd.edu/do-the-math/2011/11/mpg-of-a-human/ 

 or this, which you wish you hadn't:...

As an aside, a generic shape not designed with aerodynamics in mind—let’s call it a man-bear-pig—will have a drag coefficient around 0.8–1.4. A trout, on the other hand, has a drag coefficient around 0.1. What we really need is a trout on a bicycle! Then we’d really be smokin’. We can turn the famous feminist slogan that “a woman needs a man like a fish needs a bicycle” on its head with the observation that a bicycle really screams out to have a fish ride it! - See more at: http://physics.ucsd.edu/do-the-math/2011/11/mpg-of-a-human/#sthash.tHs5BKjC.dpuf
As an aside, a generic shape not designed with aerodynamics in mind—let’s call it a man-bear-pig—will have a drag coefficient around 0.8–1.4. A trout, on the other hand, has a drag coefficient around 0.1. What we really need is a trout on a bicycle! Then we’d really be smokin’. We can turn the famous feminist slogan that “a woman needs a man like a fish needs a bicycle” on its head with the observation that a bicycle really screams out to have a fish ride it! - See more at: http://physics.ucsd.edu/do-the-math/2011/11/mpg-of-a-human/#sthash.tHs5BKjC.dpuf
As an aside, a generic shape not designed with aerodynamics in mind—let’s call it a man-bear-pig—will have a drag coefficient around 0.8–1.4. A trout, on the other hand, has a drag coefficient around 0.1. What we really need is a trout on a bicycle! Then we’d really be smokin’. We can turn the famous feminist slogan that “a woman needs a man like a fish needs a bicycle” on its head with the observation that a bicycle really screams out to have a fish ride it! - See more at: http://physics.ucsd.edu/do-the-math/2011/11/mpg-of-a-human/#sthash.tHs5BKjC.dpuf
As an aside, a generic shape not designed with aerodynamics in mind—let’s call it a man-bear-pig—will have a drag coefficient around 0.8–1.4. A trout, on the other hand, has a drag coefficient around 0.1. What we really need is a trout on a bicycle! Then we’d really be smokin’. We can turn the famous feminist slogan that “a woman needs a man like a fish needs a bicycle” on its head with the observation that a bicycle really screams out to have a fish ride it! - See more at: http://physics.ucsd.edu/do-the-math/2011/11/mpg-of-a-human/#sthash.tHs5BKjC.dpuf
 http://www.boston.com/yourtown/boston/backbay/bbgallery/boston_world_naked_bike_ride/

I have a history of shirking technologically newborn stuff and have been accused of being a retro grouch luddite, but don't judge. I can appreciate a thing for it's quality, craftsmanship, and beauty. I love steel bikes for their simple beauty, downtube shifters for their mechanical perfection, and commonsense stuff the everyday rider can appreciate. I fell in love with wheel building because it offered such a dynamic way to improve the overall ride quality of a bike. Because of this, I often have wheels on my bike that are worth more than the complete bike. Well built wheels can make a good bike great. But, the best wheels are those designed specifically for you. Designing and building wheels that are customized to deliver the ideal ride characteristics for the user is an art. It's not just about picking a bunch of nice products and assembling them correctly. (Well, mostly it is)

Having the experience and knowledge of how materials, rim shapes, hub design, spoke thicknesses and lengths, and lacing patterns changes the wheel's characteristics and how a rider with their machine affecting the experience. The relationship between a rider and their bike is an emotional one, and in the end, riding a bike is only for fun. Even if it is used as a tool for training or commuting, carrying rabbit traps into the wild or hauling fish to market, it is still a fun experience. See!!??? photo...


Of course, there's always the exception...
















You rarely hear anyone say gridlock this morning on my bike on the way to work was hell. Or, I just got put together for $2,000- bucks for an alternator. You know why, because, bikes don't have alternators. But they do have wheels and they'd be a lot less fun if they didn't. I look forward to spending time with each and every on of you. Signing off for now. By the way, if you're curious after just this post about wheels--send me an email, let's talk! -Gene (gene_ruiterATcycleloft.com)