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Bike Touring Equipment Bikepacking The Touring Bicycle Wheel Touring Bicycles Touring Bike Components

The Best Bikepacking Bike Pt. III: Wheels

The stakes are high when traveling far into the backcountry by bicycle.  The potential success or failure of your trip is (literally) riding on your wheels.  A mechanical malfunction at the wrong time can leave you in a very serious situation.  Like teeth, taxes or electricity, your bicycle wheels are easy to ignore when they aren’t causing problems, but can leave you in a world of pain and trouble when things go bad.  Fortunately, most of these kinds of problems can be prevented by choosing appropriate equipment and ensuring it is well-maintained before heading out for a trip.  This is especially true when talking about wheels.

In this post, we’ll discuss what makes a good bikepacking wheel, how to evaluate your current wheels and some points to consider when shopping for new wheels.  Hopefully we’ll be able to help you enjoy your bikepacking adventures with no wheel-related malfunctions!

Reliable wheels are essential when traveling though rough, remote areas.

In general, we think good bikepacking wheels should be durable and reliable above all else.  Gram-saving components will make precious little difference in the ride of your bike when loaded down with 35 pounds of gear and failures are much more than a minor inconvenience when you’re two days from the nearest town.  Fortunately, most truly trail-worthy mountain bike wheels are built to handle pretty rough treatment and won’t suffer greatly under the added stress applied by a loaded bike.  However, many lower-end wheelsets are not built with long-term durability in mind.

Are your wheels ready for bikepacking?  Many stock wheelsets are not.  Bike manufacturers often cut cost on wheels when spec’ing bikes for middle-of-the-curve riders.  Even many high-end bikes are shipped with inferior wheels that don’t hold up to hard riding.  However, it isn’t always easy to tell a high-quality wheel from a cheap look-alike.  In addition, even top-flight wheels can be a liability if they’re nearing the end of their useful life.

There are a few ways to evaluate your wheels for quality and condition, so let’s get into those:

Consider their Service Record

Assuming you’ve put some hard miles on your wheels, perhaps the simplest measure of quality is their service record on the trail.  So, how have your wheels performed so far?  Have they needed regular re-truing?  Have you broken any spokes?  Do the hubs make any funny noises or need repeated bearing adjustments?  If so, you’d be wise to consider repairing or upgrading your wheels before taking off into the woods.  If they’ve taken some abuse with no ill-effects you’re likely to be in good shape.  If you’re unsure about any of these points, a trusted mechanic can help assess your wheels.

However, just because you haven’t had issues yet doesn’t mean they won’t crop up in the future.  The key here is preventative maintenance.  We’ll talk more about that in a bit.  For now, let’s take a closer look at your wheels and see if we can evaluate them for quality and condition.

Check Those Spokes 

A spoke is a spoke is a spoke, right?  How big of a difference do spokes really make?  Well, imagine if the Golden Gate Bridge was built with suspension cables made from cheap steel to cut cost.  Bicycle wheels and suspension bridges have a lot in common.  Spokes made from poor-quality steel will have a much shorter lifespan and will be prone to breakage.  Quality brands like DT Swiss, Wheelsmith and Sapim mark their spokes, either on the head (DT, Wheelsmith) or just below the j-bend (Sapim).  Cheap spokes will have no mark at all or one of a handful of markings such as a star or uppercase “S” or “N”.  If you’re curious, you can investigate the mark on your spokes using this extra-nerdy Spoke Head Identification website.

Quality spokes from DT Swiss. Their butts are visible if you look closely.

A butted spoke is also a definite indicator of quality.  Butted spokes are tapered in the center and thicker at the ends.  Sometimes the butts will be clearly visible.  If not, you can feel for the taper by grasping the spoke near the nipple with your thumb and forefinger.  Slide your fingers up the spoke and you’ll feel the diameter decrease if your spoke is butted.  A butted spoke distributes stress along that slender center section rather than focusing it at the j-bend or threads, improving durability.  As a happy side effect, they are also lighter.

Regardless of quality, any bent or gouged spokes can cause problems or break prematurely.  Bends typically happen when an object lodges in the wheel as it turns or through impact.  Gouging most often occurs on the drive-side spokes due to the chain shifting over the largest cassette cog.  Cassette removal may be necessary for this inspection.

Inspect Your Rims

Rim failure can be sneaky!

As we discussed in a previous post, single-wall rims are wholly inadequate for bikepacking.  Fortunately, even entry-level mountain bikes typically feature a double-wall rim.  Much like spokes, the quality of a rim can be difficult to assess.  Rim makers such as DT Swiss and Stan’s are at the top of the original equipment game.  WTB and AlexRims are common in the middle of the range.  Fortunately, even many inexpensive rims can hold up to hard riding if kept true and properly tensioned.

Of course, even the best rims will suffer the ill effects of high mileage, hard riding or abuse.  If your rims have any major dents or bends you’d be wise to replace them before a big trip.  Also, check the nipple seat for cracks.  This is a common failure mode on quality wheels that have reached the end of their life.  On a bike with rim brakes, you should also inspect the brake track for excess wear.

Evaluate Your Hubs

Formula hubs are typically affordable and reliable. They’re common on quality stock wheels and hand-built options.

Even inexpensive hubs rarely fail but you’d still be wise to evaluate their condition before heading out.  Is there play in the bearings?  Try to push the wheel side-to-side while clamped in your frame or fork.  Do you feel any knocking or play?  Remove the wheel and turn the axle end by hand.  Do the bearings feel rough when you turn the axles?  Does your freehub make odd noises when coasting or fail to engage when you start pedaling?  If your hubs exhibit any of these signs you’d be wise to service them before hitting the trail.

Steer Clear of “Wheel Systems”

Wheel Systems may look fast and flashy but sacrifice reliability and serviceability.

We have seen a nearly infinite number of departures from the traditionally-spoked design as manufacturers continue to reinvent the bicycle wheel.  Some of these variations may offer a performance benefit for competitive cyclists.  Most simply want to stand out from the crowd and appear unique.  Regardless of the result, they accomplish this at the expense of durability and serviceability.  You may be wise to consider a replacement if your wheels have fewer than 28 spokes, nipples that aren’t square or spokes that aren’t made of stainless steel with a j-bend at the hub.  Fortunately, most bike makers are using more traditional wheels on their mountain bikes these days.

Preventative Maintenance is Key! 

Assuming your wheels pass the test above, you’ll want to make sure they’re in the best possible shape before you head out for your trip.  Wheels that are properly trued and tensioned will be much less likely to go out of true or break spokes.  Hubs that are properly adjusted and lubricated will very rarely fail, even under demanding conditions.  If you’re not a top-flight home mechanic you may want to leave this job to a professional.  A skilled mechanic will also be able to update you on the condition of your wheels and help you make preventative repairs to avoid untimely failures.

Need an Upgrade?  Go Hand Built!  

A front wheel comes together in the Bike Touring News workshop.

If your wheels aren’t up to the task or if you’re just looking for an upgrade you’d be well-advised to go hand built.  Unless finished by a skilled wheel builder, machine-built wheels are often undertensioned and tend to need repeated truing even if they are built with quality components.  A hand built wheel allows you the choice of components specific to your application and the ability to customize to your heart’s content.  A good wheel builder will also build to precise, even spoke tension and take steps to remove the stresses that cause wheels to go out of true, resulting in a very durable, reliable wheel built specifically for your riding style and intended use.  They don’t have to be expensive either.  Our prices for hand built wheelsets typically start around $300 and go up from there depending on options.  We build a large number of bikepacking wheels here at Bike Touring News and would love to talk with you about your dream hoops!

If you’re considering a new wheelset, think about incorporating a dynamo hub into the build.  The benefits of dynamo lighting and charging are massive, even if you don’t expect to do a great deal of riding after dark.  With a dynamo light you’ll never have to worry about charging or replacing batteries or leaving your light behind.  If you’re traveling off the grid and need to charge electronics, there are a also a variety of USB charging options powered by your dynamo.  That front wheel is already turning over; why not put it to work?  We offer a wide range of hubs, lights and chargers for every budget and application but that is a subject for another post!

Hand built and dynamo equipped! These 27.5+ wheels are ready for anything!

It is difficult to understate the value of solid, reliable wheels for bikepacking.  Good wheels are the best upgrade you can possibly make and are worth their weight in gold.  We hope you’re feeling better equipped to evaluate your current wheelset or consider what you may look for in an upgrade.  As always, feel free to drop us a comment to ask a question or share your experience.  Have you ever had a bike trip hijacked by wheel problems?  What qualities do you look for in a good wheel?

Thanks for reading and keep on pedaling!

Categories
Hermit's Workshop The Touring Bicycle Wheel

When To Replace a Worn Wheel Rim

It’s early morning in Moab, Utah when the still air is violated by the sound of a small explosion and the clang of scraping metal. My friend’s rear wheel has come apart and is a twisted jumble of aluminum rim, steel spokes and rubber. For the first time, I realize that soft rubber brake pads can wear through metal. Sand and other grit in a slurry with oil and who knows what other chemicals get embedded in the pads and act like a grinding disc to wear away at the relatively soft aluminum braking surface of the rim. Once the braking surface becomes too thin to provide structure to the rim, the forces of the tire bead can blow it apart. Here is a visual example of what I am talking about.

The braking surface on a new rim is flat, if not a little concave.
The braking surface on a new rim is flat, if not a little concave.

A worn rim braking surface.
A worn rim braking surface.

The concavity of the worn rim is visually apparent, but it can also be felt by the fingertips. Lots of times this is just a judgment call. Some rim makers machine a groove in the circumference of the rim’s braking surface and others create three or four small dots or indented holes at intervals around the rim. Once these indicators are no longer visible it is time to replace the rim.

Check your rim brake bicycle’s rims. If the braking surface feels like it has a little concavity to it, replace it before you go on the next long tour.

Categories
The Touring Bicycle Wheel Touring Bike Components Touring Bike Tires

Wide Rims

A customer needed a new front wheel for the new Straggler fork on his Cross Check. He wanted a disc brake on front for single track riding and the Straggler fork is very close to the Cross Check fork geometry-wise. I built up the wheel using a Surly Ultra New hub and the DT Swiss E512 rim which at 30mm wide is a full 11mm wider than the DT Swiss R450 rim on the wheel he was replacing.

Two rims side by side
A significant width difference!

Why did I use such a wide rim? For a couple of reasons. The same tire, in this case a 700 x 35 Continental Cyclocross Speed, on a wider rim will have a wider contact patch than when mounted on a narrower rim and this means more traction. The tire will also have a cross section which will be a little more “square” and less balloon like. What this means, in theory, is that the tire will have less tendency to roll sideways when the wheel is angled into a turn and the handling should be more firm and confidence inspiring with no squirming. This idea is visually represented in the following two pictures:

 Wide rims provide optimal grip and allow a thinner carcass combined with increased traction and tracking ability. Photo: syntaceusa.com
Wide rims provide optimal grip and allow a thinner carcass combined with increased traction and tracking ability. Photo: syntaceusa.com
tire on narrow rim
Narrow rims provide little guidance for the tyre. The tyre “folds” and can even jump out of the rim.
Photo: syntaceusa.com

When it was done, we gained about 4mm in width to the inflated tire, a little over 1%. While that doesn’t sound like a significant increase it should stiffen up the sidewalls of this tire and contribute to better handling and cornering. The combination of a little bit of extra width in the tire and a deeper rim profile make the wheel and tire look quite a bit bigger then the original setup on this bike. Neither a Cross Check nor a Straggler now. Monster Crossler?

side by side tires
The tire on the top is on the 19mm rim and the one on the bottom is on a 30mm wide rim.
Categories
The Touring Bicycle Wheel Touring Bicycles

Wheel Size- Myth and Theory

Every size of the Long Haul Trucker bicycle, from the tiny 46cm bike to the gargantuan 64cm bike is available with 26″ wheels. 56cm and larger frames also come in 700c wheel versions while 54cm and smaller bikes only come with 26″ wheels. Why do they do that? Why can’t you buy a smaller bike with 700c wheels? And how do I choose between 26″ and 700c wheels on my 62cm Long Haul Trucker?

A Surly LHT in black with 700c wheels
700c wheel on a 56cm Long Haul Trucker. Nice proportions.

 

Big bike..little wheels
62cm Surly Deluxe Trucker with 26″ wheels
58cm Surly Disc Trucker w/26″ wheels

First, some bike design theory:
As a bike frame shrinks in size 700c wheels become problematic in a couple of ways. Georgina Terry from Terry Bicycles does a fantastic job of qualifying those problems in her videos about Bicycle Design
With a given wheel size- in this case 700c- there is a limit to how low the top tube can be before you run out of head tube and how short it can be before the rider’s foot starts hitting the front wheel.
Some bike manufacturers call some of their smaller bikes “women’s specific” and paint them in girly colors, which is nothing less than a marketing gimmick. Mainstream bike companies assume that the market will demand 700c wheels on their “road bikes” and so they compromise the design of the smaller bikes by changing the angle of the seat tube to make the top tube shorter and they change the angle of the headtube to mitigate toe overlap with the front wheel, which also helps make the top tube shorter.

A better way, and the way good bike designers like Terry, Rivendell and Surly do it is to change to a smaller size wheel as the frame size shrinks. Rivendell and Surly change both front and rear wheel sizes while Terry uses a smaller front wheel with a 700c rear wheel.
Terry Precision -- SOLD

A truism I hear all the time is that 700c wheels are faster than 650b or 26″ wheels. But I don’t buy it. That’s what they make gears for. A 26″ wheel will be spinning faster than a 700c wheel would be at the same velocity so the rider might be in a higher gear.  Surly makes the analogy of a tractor compared to a Formula One car….the controlling factors being gearing, suppleness and quality/type of tire and the motor.

What about handling of a bike with the smaller tires? Georgina Terry simply says that the front end is designed for the a smaller tires and so the handling isn’t twitchy. One of those design features taken from the Surly geometry charts is a slightly more slack head tube on the 26″ bikes which results in a similar trail when compared to the 700c bikes. I do think that a bike with 26″ wheels rides differently than one with larger wheels, simply because of that gyroscopic thing.

The reason Surly decided a couple years ago to offer every size LHT and Disc Trucker in 26″ wheel versions is that the 26″ wheel size is more ubiquitous around the world and replacement wheels and tires should be easier to find. So if you plan on touring in countries outside the US, 26″ wheels might be a good way to go. Come to think of it, there may more 26″ wheels and tires available here too in out of the way places. I’m reminded of the story of the couple traveling between Portland and Boise when they accepted a ride in a pickup truck and her bike fell out at 60 MPH. The rear wheel was ruined but their hosts had an old mountain bike in a shed from which she was able to salvage a serviceable wheel.

So, to summarize:
-Small bike…small wheels
-Larger bike and desire to find replacement wheels/tires wherever one may tour (or desire to run really fat tires) …26″ wheels.
-If you think 26″ wheels on bigger bikes look funny….700c wheels
-If you are convinced that 700c wheels are somehow faster…get those (assuming, of course, you think going faster is a good thing)

Categories
Drivetrain The Touring Bicycle Wheel Touring Bike Components

A Bike Touring Wheelset

A hub is laced to a rim with spokes and nipples in order to create a wheel. Elementary I know but semantics are important if the aspiring bike tourist is to make him/her self understood.

I don’t want to go into how to build a bicycle wheel because there are hundreds of YouTube videos and several good books available on how to do it. (Jobst Brandt’s The Bicycle Wheel being the paradigm for books)

I will say there are a couple of elements that make a good, strong touring wheel, and these things may not be intuitive. Here is a good touring wheelset:

A durable inexpensive wheelset for loaded touring.

Shimano Deore hubs laced to Mavic A319 rims with 36 DT Swiss double butted spokes.

Notice there are a lot of spokes…36 per wheel to be exact. Each spoke crosses 3 other spokes on the way from the hub to the rim, creating a structure of amazing grace, elegance and stability. Some recently popular wheel designs with as few as 18 spokes per wheel rely on the strength of the rim for stability of the wheels which results in a heavier rim. (unless the rim is carbon fiber) Spokes actually are made in various gauges or thicknesses and a visceral reaction might be to assume that thicker spokes will result in a stronger wheel….but not so fast. The spokes flex with every revolution of the wheel, no way around it. So making the middle sections of the spokes thinner than the ends (called “double butting”) allows the spokes to flex and adds strength where they are most likely to fail; at the ends. Get Mr. Brandt’s book if you want to know the excruciating details.

In my experience, based on building dozens of wheelsets, there are only two companies that consistently make high quality rims: Mavic and Velocity. The Mavic A319 rims are a super solid choice for a touring wheelset. For hubs it would be hard to beat the Shimano Deore hubs for value. Steel axles and loose ball bearings make a durable, user friendly combination.

Mavic A319 36 hole.

Eyelets provide a wider and smoother bearing surface for the spoke nipple, distributing the load and mitigating galling or cold welding of the rim by the spoke nipple.

A good box section rim will have an outer wall and an inner wall creating the “box section”. The eyelets on the Mavic A319 distribute spoke loads to both the inner and outer walls of the rim.

FULL DISCLOSURE:
I built these wheels for a customer who reminded me he has disc brakes. Disc brakes require a disc specific hub onto which the brake rotor is bolted. These wheels don’t have a disc specific hub. That’s right, I’m a professional and an expert. I’ll be selling this wheelset and the customers new wheels are on the way.