Anatomy of a Custom Bike

What really makes a bike custom? Sometimes it’s the geometry. Sometimes it’s a special paint job. Sometimes, though, it’s literally everything. Some customers come to us with a good idea of what components they want, how they want the bike to handle under specific conditions, and what overall aesthetic they’re aiming for. These kind of customers want to make sure each component of the bike it optimized to fit their vision of the bike, and helping them fine tune their vision is one of the most satisfying parts of our job. When you help someone craft a bike that’s just right for their needs it’s a great feeling.

This blog post will be the first of many detailing the entirety of a bike like this. Not just a parts list, it will explain the logic behind each decision and hopefully serve as an inspiration for those who want to build just such a bike for themselves.

Gary’s Bandito

Today we’ll be taking a close look at Gary’s Bandito. Gary is a randonneur and he built this bike in large part to ride the 2019 Paris-Brest-Paris ride. For the uninitiated, that’s a 1200km (750 mile) ride that must be completed in under 90 hours. It’s the kind of ride that requires a trained athlete and a reliable bike. Gary also wanted a bike that was as gorgeous as it was functional, so it got a beautiful paint job as well. Let’s take a look at some of the details.

Let’s start with the wheels. Gary chose DT Swiss 180 hubs, so named because the rear hub weighs only 180 grams. These hubs come standard with high quality ceramic bearings which reduce both weight and rolling resistance. The rear hub is equipped with the DT Swiss patented Star Ratchet system freehub, which provides excellent engagement while being incredibly reliable and easy to service. These hubs may be the best combination of lightweight, reliability, and performace available. Perfect for a grueling long distance ride.

The rims are also DT Swiss. They’re the 700c XR 331 model, which is a well balanced disc-only rim that offers stiffness and strength in a lightweight package at only 380 grams per rim. The spokes are DT Swiss Competition double butted spokes with the DT Squorx nipples. Rounding out the package are a set of Compass (now Rene Herse) Stampede Pass Extralight tires. These are some of the lightest and fastest rolling clincher tires on the market and provide a famously supple ride. Overall, these wheels are very light without sacrificing durability or ride quality. They’re as light or lighter than most wheelsets with carbon rims and less expensinve. They’re also easily serviceable at any competent bike shop. They’re as close to “worry free” as a high performance wheelset gets.

The crankset and bottom bracket on this bike follow a similar theme, combining lightness, durability, and function. The Easton EC90 SL cranks are some of the lightest and stiffest cranks on the market. Gary went with a chainring combo of 46/30, which is a popular combination for randonneurs. The real prize, however, is the bottom bracket. The Enduro TorqTite with XD-15 bearings is one of the toughest, lightest bottom brackets on the market. Ultra smooth ceramic cartridge bearings that are nearly indestructible, it holds up to heavy use and abuse.

Believe it or not, this bike did not have an unlimited budget. Gary chose to save a little bit by going with Sram Rival instead of Sram Red shifters, derailleurs, and hydraulic brakes. This saved a bit of expense with only a minor weight penalty. That same thinking led to the choice of Shimano PRO alloy handlebars and a plain alloy stem. Some of that weight was mitigated, however, by using a traditional 1-1/8″ headtube and straight steertube Whisky No7 carbon fork. This setup saves a bit of weight over a tapered headtube and matching fork. The FSA Orbit X headset weighs about the same as a Chris king but at half the price so that was an easy choice for Gary.

All of this is to complement the Rodriguez Bandito frame we built for Gary. Made of our ultralight steel tubing blend and custom fit to Gary’s measurements, it’s the perfect frame for a rider that spends long hours in the saddle. The supple ride quality of a steel frame is legendary for a reason and is still the go to choice for many serious riders. We’ve been building custom steel frames since 1973 and we’ll be happy to keep doing it well into the future.

Gary’s bike is a good example of what goes into a fully custom bike. Every piece of the puzzle was considered as to how it fit with Gary’s overall vision of the bike he wanted. When Gary wasn’t sure about a component, he was able to draw on our experience and find the right choice from his many options. This kind of project can be deeply satisfying for everyone involved and in the end, we produced the bike Gary envisioned. To us that’s a job well done. In future blog posts, we’ll look at other dream bikes and see what decisions brought them to fruition. For a full gallery of Gary’s bike, go here. You can see a full list of Gary’s parts below:

  • shift/brake levers – Sram Rival 22 hydraulic
  • derailleurs – Sram Rival 22
  • brakes – Sram Rival hydraulic
  • rotors – Sram Centerline CL 160mm front 140mm rear
  • crankset – Easton EC90 SL
  • chainrings – Sram 46/30 double
  • bottom bracket – Enduro TorqTite w/XD-15 ceramic bearings
  • cog set – Sram 11-34 11 speed
  • chain – Sram 11 speed
  • hubs – DT Swiss 180 ceramic w/11 speed freehub
  • rims – DT Swiss XR331 700c alloy
  • spokes – DT Swiss Competition 14/15g double butted stainless
  • nipples – DT Swiss Squorx
  • tires – Compass (Rene Herse) Stampede Pass Extralight 700×32
  • skewers – Loaded Xlite titanium
  • headset – FSA Orbit X 1-1/8″
  • stem – basic alloy – custom painted
  • handlebars – Shimano PRO Vibe
  • bar tape – black cork
  • seatpost – FSA Energy alloy
  • seat collar – Salsa
  • saddle – Fabric Scoop titanium
  • fork – Whisky No7 1-1/8″ straight steertube carbon – custom painted
  • fenders – Portland Design Works Full Metal Fenders Road Plus

Are Dynamo Hubs For You?

The dynamo hub has made a resurgence over the past decade. For those unfamiliar, a dynamo hub is a hub that uses a small internal generator to produce electricity as the bicycle wheel rotates. This electricity powers a light system and can charge a small electronic device with the right setup. Advances in magnet technology and the rise of efficient LED bulbs have made dynamo hubs smaller, lighter and more effective than ever before. Quality hubs are being made by Schmidt, Shimano, Shutter Precision, and others. If you’ve been considering a dynamo system, there’s never been a better time.

The three types of riders that most often use dynamo hubs are daily commuters, riders that do multi-day bike touring, and long distance Randonneur riders. For the commuter, dynamos provide a near maintenance free lighting system that they don’t have to think about. It’s just always there, never needing charging or fresh batteries. You can grab your bike and go with one less thing to worry about. Touring riders use their dynamos as a charging station that keeps their devices charged no matter how many days they’re on tour. Very handy when you’re using GPS as your guide or your phone is your only connection to civilization. Randonneurs can’t afford to have a light battery die in the middle of a 1200km ride so the dynamo hub system gives them a reliable, battery-free system they can depend on for the long haul.

This system with a Schmidt SON Delux hub and B+M Luxos U headlight provides both light and charging capability

There are some trade-offs for all of this convenience and reliability. Cost is one factor. The high end systems can be quite expensive, but there are entry level hubs and lights available as well. You must have a dedicated wheel built for the dynamo hub itself, then lights and wiring must be installed. While not terribly difficult, setting up the system can be time consuming. Adding a USB charger into the mix can add cost and complexity, depending on how you choose to do it. The good news is that you only have to do it once. There’s also a bit of a weight penalty, since dynamo hubs are heavier than a standard front hub. The dynamo magnets also produce a slight amount of drag when rolling, The amount of which depends on the hub and whether the light is turned on. For example, the Shimano Alfine dynamo requires 2.2 watts of additional force at 30 kph, while the Schmidt requires 1.2 watts at the same speed. That is with the light or charger turned off. Both hubs require between 6 and 7 watts when the light or charger is switched on at that speed.

Modern dynamo hubs are meant to be mostly maintenance free. Manufacturers require the hubs to be serviced by professionals and hubs must be shipped to service centers. Attempting to service any dynamo hub yourself is a dicey affair. Most require proprietary tools and also have delicate electronic parts that are easily damaged by inexperienced hands. This is where the longevity of a hub comes into play. As a general rule, the higher end hubs can travel farther before problems occur. Schmidt, for example, says you should get tens of thousands of kilometers out of one of their hubs before any maintenance is required.

Much of the best bicycle lighting available comes from dynamo specific lights. Companies like Busch+Mueller, Schmidt, Supernova, and Herrmans have headlights that provide wide, evenly illuminated light fields that cover a large swath of the road ahead while not blinding oncoming riders. Compared to the focused round beams of most battery powered lights, it’s almost no contest when it comes to road visibility. You can see some nice beam comparisons here.

This is just an introduction to dynamo systems. If they interest you, we’d love to help you put a system together. Our expert mechanics can have you up and running in no time. Whether you want a reliable lighting setup, or a full charging system, we can help you select what will fit your needs best.

For further reading we recommend the following pages:

Here’s a Rodriguez with a Schmidt hub and light system

Peter White’s page is a deep well of information on dynamo systems

Cycling About has some good info about chargers

Sheldon Brown has some dynamo history

Jan Heine’s blog has lots of different posts on this subject (mostly Schmidt-centric)