Bill Mould Wheels

Bill Mould Wheels Bicycle wheels and DVDs About Bill Mould

Expert bicycle mechanic
Licensed by USA Cycling as a race mechanic
Builder of custom bicycle wheels for every situation from professional racing by fit riders to recreational cycling of average Americans
Over 3000 wheels designed, engineered, and constructed
College professor teaching physical sciences in a local college in Northern Virginia
Former airplane pilot
Lifelong rider
Publisher of DVDs dealing with bicycle maintenance, wheel building, physics, aerodynamics, power meters, carbon rims, and frame geometries for road, time trial, and triathlon bicycles
“Ready to Roll”, “Master Wheel Building”, and “Bike Better, Bike Faster” available at Spokes, Etc.
(12)

stores in Northern Virginia as well as Amazon.com
One-on-one classes offered in the bike shop on how to build bicycle wheels
Employed by Spokes, Etc. at the store on North Quaker Lane, Alexandria VA

stores in Northern Virginia as well as Amazon.com
One-on-one classes offered in the bike shop on how to build bicycle wheels
Employed by Spokes, Etc. at the store on North Quaker Lane, Alexandria VA

Operating as usual

Talk about wasted energy!!  I stayed one night this past week in each of two hotels. When I checked in to my first room,...
07/10/2021

Talk about wasted energy!! I stayed one night this past week in each of two hotels. When I checked in to my first room, the temperature was 68 degrees, and the second was 61 degrees. It was so cold that I turned on the heat, in July! Why do hotels keep rooms so cold?

Talk about wasted energy!! I stayed one night this past week in each of two hotels. When I checked in to my first room, the temperature was 68 degrees, and the second was 61 degrees. It was so cold that I turned on the heat, in July! Why do hotels keep rooms so cold?

I'm helping the engineers at the new LeMond factory with some wheel building physics.  This came in the mail a few days ...
05/22/2021

I'm helping the engineers at the new LeMond factory with some wheel building physics. This came in the mail a few days ago.

I'm helping the engineers at the new LeMond factory with some wheel building physics. This came in the mail a few days ago.

01/25/2021

A friend of mine is between jobs. He has a degree in mechanical engineering from Purdue. I've worked with him for years. If you have any leads, please let me know.

12/31/2020

I am exploring setting up a Google Group for people interested in a science-based discussion about bicycle wheels. Does anyone have any experience with Google Groups that might be willing to help me?

With me is Tobias Klein and his father Marc Klein. At only 17 years of age, Tobias is already a Category I racer and the...
12/25/2020

With me is Tobias Klein and his father Marc Klein. At only 17 years of age, Tobias is already a Category I racer and the top ranked Junior in the United States in criterium and road racing. They are holding a set of Princeton Carbonworks time trial wheels that are identical to the ones I built for Filippo Ganna who rode them to victory in the recent Time Trial Championships in Italy. With a little sponsorship, I'm hoping I can equip Tobias with a like set. It's nice that Tobias is also a straight A student, so he will have many good choices in the future.

Yesterday, my boss asked me to check the tension on the rear wheel of a $1000+ mountain bike.  I won't mention the brand...
12/24/2020

Yesterday, my boss asked me to check the tension on the rear wheel of a $1000+ mountain bike. I won't mention the brand, but it is one of the big ones. The wheel was horribly built: half of the tension it should have had, out of round, out of lateral true. The tension was very poorly balanced. Three spokes on the left side had no tension at all. I could have taken them out completely, and it would have made no difference. I made the wheel perfect, but it took me at least 30 minutes of valuable time. It's not the wheel in the photo.

I'll be a little slower in wheel building for a few days.
06/06/2020

I'll be a little slower in wheel building for a few days.

I am reposting this because of an error in the link.I recently sat for an in-depth interview about the science and engin...
06/06/2020

I am reposting this because of an error in the link.

I recently sat for an in-depth interview about the science and engineering that goes into bicycle wheels: rim brakes, disc brakes, forces, spoke tension, stability, crossing patterns, static and dynamic testing results, etc. The interview has now been published as a Podcast from “The Two Johns”, one being John Koury, the interviewer. Below is a link. It’s about 45 minutes long, and it’s a very interesting and informative discussion.

www.patreon.com/twojohnspodcast

I recently sat for an in-depth interview about the science and engineering that goes into bicycle wheels: rim brakes, di...
06/03/2020

I recently sat for an in-depth interview about the science and engineering that goes into bicycle wheels: rim brakes, disc brakes, forces, spoke tension, stability, crossing patterns, static and dynamic testing results, etc. The interview has now been published as a Podcast from “The Two Johns”, one being John Koury, the interviewer. Below is a link. It’s about 45 minutes long, and it’s a very interesting and informative discussion.

www.patreon.com/twojohnspodcast

I saw this on the back of a truck today.  Someone needs a spellchecker.
05/16/2020

I saw this on the back of a truck today. Someone needs a spellchecker.

Conspiracy theorists cloak themselves in scientific-sounding words and often gain credibility from a gullible public.  T...
05/05/2020

Conspiracy theorists cloak themselves in scientific-sounding words and often gain credibility from a gullible public. Theories that are not falsifiable are not scientific because it is not possible to prove scientifically that something didn’t happen. You can’t prove a negative. Critical thinking and logic are therefore important and so is a little healthy skepticism.

I don't see myself taking an airline flight any time soon.  It's clear that they can't protect us.  A recent flight from...
04/29/2020

I don't see myself taking an airline flight any time soon. It's clear that they can't protect us. A recent flight from Miami to LaGuardia was reported as about 90% full. This is not going to get any better for a very long time.

The CDC does not recommend drinking toilet bowl cleaner as a preventative for coved-19.
04/24/2020

The CDC does not recommend drinking toilet bowl cleaner as a preventative for coved-19.

04/21/2020

Have any of you received your "stimulus" check yet?

Friends, I just published a technical paper explaining the mechanism by which aluminum bicycle rims crack as well as ste...
04/17/2020

Friends, I just published a technical paper explaining the mechanism by which aluminum bicycle rims crack as well as steps that can be taken to delay and slow rim cracking. Before publishing, I subjected it to extensive expert review. You can see a 30-minute video at the below link.

https://www.youtube.com/watch?v=qKeeHDuoFq8&t=2s

03/16/2020

Done good thing about the corona virus. People are learning that the correct word is expoNential, not expoDential.

My wife and I had dinner in a restaurant last night.  I had to use the bathroom which accommodates only one person at a ...
03/12/2020

My wife and I had dinner in a restaurant last night. I had to use the bathroom which accommodates only one person at a time. As I approached the door, one of the cooks emerged from the inside. Then I went in. The wash bowl was dry.

Is it true that the Corona virus comes from beer?
03/06/2020

Is it true that the Corona virus comes from beer?

02/18/2020

In case you didn't know, there is a bike EXPO beginning on March 11th. It's called CABDA New York City, but it's really across the Hudson at the New Jersey Meadowlands. For those who live on the East Coast, it's a little more reachable than some of the other shows. Flights fo Newark from Washington DC are pretty cheap. Then again, there's always AMTRAK or driving. I'm making two presentations with Matt Ruiter, Velocity general manager.

I posted two short videos on my YouTube channel yesterday.  One is “Pushing and Pulling Spokes” and explains how all spo...
02/13/2020
Bill Mould Wheels – Custom Wheel Builder

I posted two short videos on my YouTube channel yesterday. One is “Pushing and Pulling Spokes” and explains how all spokes are actually pulling spokes but their magnitudes change when you put a force on the pedals. We use the terms pulling and pushing in wheel building, but none of the spokes actually push. The second is “Drivetrain and Gears” and provides a really simplistic explanation about gears and gear ratios. Go to my website and click on YouTube near the top of the page.

www.BillMouldWheels.com

In addition to the carbon composite rims I use from NOX Composites, Boyd Cycling, ENVE, and Zipp, I would like to give a...
02/08/2020

In addition to the carbon composite rims I use from NOX Composites, Boyd Cycling, ENVE, and Zipp, I would like to give a big shout-out to Princeton Carbonworks. A relative newcomer to the field, Princeton Carbonworks (PCW) has seen explosive growth in its popularity among pros and elite amateurs. Spokes, Etc. now has an account with PCW, so I can build high-end custom wheels with PCW rims just like I do with the others. At my shop on North Quaker Lane, I am proud to say that I am the only person in the U.S. who PCW has entrusted with the responsibility of building their wheels, including about 25 in the last two weeks. Pros with very recognizable names from Team Ineos and others are riding them and setting world and course records.

BillMouldWheels.com
Princetoncarbon.com

I gave a two-hour presentation yesterday to about a hundred freshmen at the Thomas Jefferson High School for Science and...
01/30/2020

I gave a two-hour presentation yesterday to about a hundred freshmen at the Thomas Jefferson High School for Science and Technology yesterday. The subject was about bicycle wheels and gears. They were pretty attentive. I had lots of props and demos to hold their attention. I showed them how the potential energy in a fully tensioned wheel is converted to kinetic energy; by cutting a spoke, it flies off like an arrow. There was a lot of giggling when I mentioned nipples.

It doesn’t get any more high-end than this time-trial rocket owned by Shane Mahon, a Dutch pro.  I built him the front w...
01/28/2020

It doesn’t get any more high-end than this time-trial rocket owned by Shane Mahon, a Dutch pro. I built him the front wheel, a Princeton Carbonworks (PCW) WAKE 6560 rim laced to a White Industries T11 hub with Sapim CX-Ray spokes, Sapim secure lock alloy nipples, and Sapim HM nipple washers. Time-trial racers and triathletes have really taken to this wheel, which is usually paired with its rear mate. PCW’s rising popularity for 6560 and 4540 wheels are keeping me plenty busy.

www.princetoncarbon.com
www.billmouldwheels.com
www.spokesetc.com

01/15/2020

Arriving in California, this time in San Diego, I am reminded again at how vastly unpopulated this magnificent state is. Aside from the familiar cities of concentrated development, most of the state is unexplored barren and mountainous wilderness.

With Bill Mould is Summer Cook, professional triathlon racer.  Summer is picking up a set of Princeton Carbonworks wheel...
12/30/2019

With Bill Mould is Summer Cook, professional triathlon racer. Summer is picking up a set of Princeton Carbonworks wheels that were hand built by Bill at the Spokes, Etc. bike shop on North Quaker Lane in Alexandria VA. In July, Summer will be heading to the Olympics in Tokyo as a member of the USA Olympic Team.

Some of you know that I closely followed a case of aggravated involuntary manslaughter involving a man driving a vehicle...
12/25/2019

Some of you know that I closely followed a case of aggravated involuntary manslaughter involving a man driving a vehicle while drunk, a serious felony. The driver ran into another vehicle, and a lovely young woman was instantly killed. One of the things that impressed me most was the professionalism, compassion, and fairness of the judicial system, Fairfax County, in this case. Multiple judges were involved at different phases. I made many trips over many months to the City of Fairfax.

If you have children, consider taking them to a court proceeding. You might be surprised at the flexibility of judges to coordinate schedules between opposing attorneys to avoid conflicts. You might be surprised by the respect shown to those attorneys by the judges, and you might be very surprised to see sitting judges show respect for the unfortunate soul who we might think isn’t deserving of it.

There is no school civics lesson that can possibly equate to being in a real courtroom. It’s not like television.

Joan and I wish you a Merry Christmas and a Blessed New Year.
12/25/2019

Joan and I wish you a Merry Christmas and a Blessed New Year.

Last minute Christmas present for that scientifically curious family member or friend.  Visit my website and check out t...
12/22/2019

Last minute Christmas present for that scientifically curious family member or friend. Visit my website and check out this video and others.

www.billmouldwheels.com

Here is a nice set of wheels I built recently.  Don’t be afraid to use a little color like these cool red hubs.
12/16/2019

Here is a nice set of wheels I built recently. Don’t be afraid to use a little color like these cool red hubs.

Several times each week, we get shipments of new bikes in boxes.  These were unloaded by Karl (left) and Sam (right).
12/03/2019

Several times each week, we get shipments of new bikes in boxes. These were unloaded by Karl (left) and Sam (right).

Attached are a couple of photos from my recent trip to Manhattan to be part of a presentation about Princeton Carbonwork...
11/09/2019

Attached are a couple of photos from my recent trip to Manhattan to be part of a presentation about Princeton Carbonworks wheels at the Rapha cycling clothing store on Prince Street. Two photos are from my hotel room on the Bowery. One looks downtown toward the Freedom Tower, the “phoenix” of buildings that rose from the 9/11 ashes. The other looks uptown where you can see the Empire State Building. I spent most of the early part of my life in and around NYC, so I always enjoy returning “home”.

I promise that this will be the last of this morning’s Facebook postings.  I wanted to get this information out about th...
11/04/2019

I promise that this will be the last of this morning’s Facebook postings. I wanted to get this information out about this event. As a member of this discussion panel, my role will be to talk a little about wheel science, what’s true about wheels and what isn’t, answer questions from attendees, and then enjoy any follow-on receptions. Not staying for a reception would be downright rude.

Here’s a telling CFD image showing the places where drag is predominant.  In particular, notice how clean the front whee...
11/04/2019

Here’s a telling CFD image showing the places where drag is predominant. In particular, notice how clean the front wheel is, meaning that there is a big opportunity to reduce aerodynamic drag caused by the front wheel.

Address

1545 N Quaker Ln
Alexandria, VA
22302

Opening Hours

Monday 10am - 7pm
Tuesday 10am - 7pm
Wednesday 10am - 7pm
Thursday 10am - 7pm
Friday 10am - 7pm
Saturday 10am - 6pm
Sunday 10am - 5pm

Telephone

(703) 946-3806

Products

DVDs and information

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Comments

Hey, Bill Mould, we need your scientific perspective on the forces placed on the front wheel of a bike mounted on a direct drive trainer (like the Wahoo KICKR). Or any trainer, for that matter, I guess. Are there serious concerns about prolonged tension on only a few spokes (the spokes at the top, I guess). The interwebs is full of posts about rotating the wheel 4 spokes or a quarter turn or some other magic interval to prevent premature spoke failure. What say the Wheel Guru?!
Bill, I have built my first complete wheel set with your video series. Wheels came out well. Round, True, dished and with even tension. Every time I review a chapter the more I learn. You mention mixed lacing 3 cross drive and 2 cross non drive. What are the benefits to mix lacing and what applications are best for mixed lacing? I am slowly becoming a wheel builder. Thank you for being a great resource. Larry
Thought you might like this design that we designed and made here,
Bill, thanks for the expert re-build of my front wheel. Not only was your service fast, but, more importantly, the wheel's performance was much improved; no more looseness or inability to stay on a line-the bike's handling was restored completely. Your top notch service is why you're the only person to build/tune my wheels, thanks as always.
I have followed your post for a long time and am a fan of asymmetric rear wheels. Just wondering if you have any thoughts on the the 24 spoke rear wheels with 16 drive side and 8 nondrive spokes as a way to even up tensions? Maybe testing a wheel like this could be one of your experiments if you haven't tried it before...