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Calvin's Corner

Posts by calvin@parktool.com

The Slow-Time is the Right Time for Shop Inspection

In the bicycle retail business, the slower off-season is the perfect time to do things you've put off during the crazy, busy summer, including a detailed shop inspection. Use this downtime as an opportunity to go through your tools, materials, and equipment to determine what is worn out and ne...

Bottom Bracket Standards

Bicycle drivetrains have been fairly consistent throughout our velo-history. Our feet push on some sort of crank, rotating a ring of some sort to drive a chain (or belt), which then turns a wheel. But the details between our feet and where the rubber meets the road have been changing. This art...

Thermodynamics: What can it do for you?

We live in a world of hot and cold, so we might as well put them to use. When you get out of your comfort zone, say, for example, into deep space, you might truly get to experience extreme temperature ranges. Cold so cold that gases become liquids, and hots so hot that metals run like water, o...

2013 MTB World Championships

This article will feature the 2013 Mountain Bike World Championships held in Pietermaritzburg, Republic of South Africa.

The Work Horses of Park Tool

The new Park Tool factory is big. So big it feels like it takes forever to walk from one end to the other. Just the factory is 200 x 300 feet. You have to walk down aisles of production, packaging, welding, then shipping before you get where you want to go. So with a huge new building, wha...

2013 Cyclocross National Champions

"This year's USA National Cyclocross Championship promises to be epic!!"-Anonymous Elite Racer.  That might be one way of putting it, because what we are going to be talking about here is a bike race with people wearing spandex, in Madison, Wisconsin, in the middle of Janu...

Free Bikes 4 Kids, a Minnesota program

"Free Bikes 4 Kids" is a non-profit organization based in the Twin Cites area of Minnesota. The concept of Free Bikes For Kids is to provide a bike (and a helmet) to a kid who would otherwise not get a bike. Bikes are donated at drop off locations, and what a collection of bikes ...

2012 MTB World Championships, Leogang, Austria

This article will review the technical support at the 2012 World MTB Championships in Leogang, Austria, as seen from the view of the USA Team Mechanics.

Basic Use of Tools

A sound working knowledge of tool use is the basis of being a mechanic. Developing good working habits will result in better, more consistent repairs, and in longer lasting tools. This article provides a short review of the proper use of some basic tools. Hammers (HMR-4) Hold the handle ...

Repairing On-The-Ride

This article will review repairs we can do while we are out and about on a bike. There are, of course, many possible issues and problems that can and do occasionally occur when we are riding. Here, we will consider the what to bring, the pre-ride inspection and six broad categories: Flat Tires, W...

How to Build a Spearfish

It has been 22 years since the Clark-Kent mountain bike was new (seen below, on the left). The time has come for an updated, contemporary machine, which in this case will be a Salsa Spearfish (on the right, still mud-free). At first glance you might think these bikes are for two different custome...

Springtime Attention brings Problem Prevention

Springtime is nigh upon us, the time when a true cyclist's heart turns to... what else...bicycle maintenance. With attention from you, plus some elbow grease, your early season rides will be coming up roses. So, just what occurs during those long winter months while your steed waits patiently, l...

They say you want a (shifting) revolution

If you have been trying to set up your dream ride with the new revolutionary electronic shifting systems, such as the Campagnolo® EPS™, or perhaps the Shimano® Di2™, but somehow it is just not working out for you, then perhaps you should look, not to the future, but to the p...

2012 USA Cyclo-Cross Championships

Cycling has many facets, but for me cyclo-cross stands out as a shining gem. Perhaps a muddy and gritty gem, but precious nonetheless. What appeals to me about this great racing is the required combination of speed (from the road posture and road style bikes), the requisite toughness from the pou...

2011 USA Cycling Race Mechanic Clinic

Each year since 1987, I have taught at the Bill Woodul Race Mechanics Clinic, hosted by USA Cycling. Bill was a former USAC Equipment manager. We lost Bill to cancer in1996, but it was this man who created the clinic as a place to share experiece and knowledge with newer mechanics. Teaching at ...

Bringing a Peugeot Mont-Cenis Back to Life

This article will center on is the reconditioning of an 25 year old Peugeot Mont-Cenis 12 speed bike. Posting will continue as the work progresses.

Cyclo-Cross kick off at Cross Vegas 2011

A look at the racing action of the 2011 Cross Vegas race at Interbike

2011 Mountain Bike World Championship

This article reviews the 2011 MTB World Championships as seen from the USA Team Gravity Hotel at the Grand-Paradis

Nuvinci N360 Hub Installation and Adjustment

This article reviews the installation and adjustment of the NuVinci™ N360® CVP rear hub and shifting system. The order of procedures to follow will vary depending upon whether you are installing a new system or servicing a previously install hub. This article describes: Shift Lev...

Disc Brake Squeal: A Case Study

This video will review a singular case of disc brake squeal.

2011 Cycle Speedway World Championships

Cycle Speedway is a type of bicycle racing that is not well known in the USA. It is an international sport, but Speedway creation stories all stem back to the United Kingdom. It consists of relatively short anaerobic races at outdoor facilities built for the purpose. The cinder track is absolutel...

To Fixie, or not to Fixie...why not some of each with the SRAM Torpedo hub?

The article will review the service and adjustment of the SRAM Torpedo fix & free rear hub

SHIS...coming to a store, and a bike, near you

This article will review the SHIS (Standard Headset Information System). This nomenclature is designed to simplify ordering replacement headsets. The article will also review the new headset machining tools from Park Tool. There have been new and innovative headset design standards on the m...

Answer the Call to Cross this Fall

This article is unashamedly a promotion for cyclo-cross racing. Specifically, it is a call to everyone to get out and support your local racing scene, which this time of year is cyclo-cross. Here in the America Midwest, it is a lovely time of year. The fall colors are coming on. The leaves are ...

2010 MTB World Championships in Quebec, Canada

It is Downhill finals at the Windham World Cup. We immediately break camp after the event and it is north, north to Canada.