Having a bicycling blog can be interesting in many ways. Not only do you think more about bicycling yourself, but by interacting with readers, you learn about problems and questions other cyclists face, which may not affect you.
One such issue has come up several times when readers were shopping for a new bike. I have written about or reviewed bikes which readers were interested in buying. Unlike me, some readers were concerned about the weight limit of the bikes. I’ve never considered this criterion when selecting a bike because I’m not a heavy rider. Therefore, I have never thought about the possibility of being over the weight limit for any bike.
After someone asked me about bike weight limits, I started to reflect upon the widely held stereotypes about cyclists. They are often seen as fitness freaks, as environmentalists, and as health fanatics. These things may be true about some cyclists. But, what’s often overlooked about cycling is that it’s a worthwhile activity for everyone, not just people who are thin or fit.
People of all sizes are attracted to cycling because of its many benefits and the fact that the rider’s size has nothing to do with participating in or enjoying cycling. Consequently, a surprising number of people interested in cycling are larger people. And the weight limit of a particular bike is of concern to them.
A lot of confusion exists among new and experienced riders over whether all bikes have weight limits, and if so, whether there is some sort of standard rule to determine a bike’s weight limit. Even though many bike manufacturers do have weight limits for their bikes, there is no standardization by type of bike. Each brand is different. This makes it difficult for bike shoppers to know whether a bike is suitable for someone of their size.
Some manufacturers publish their bikes’ weight limits on their websites or in product catalogs. Others do not.
To get a general idea of what typical weight limits might be, we can look at the information provided by Trek, for their bicycles.
“Yes, we do have a weight limit on our bikes and they are as follows:
Rider weight limit of 275lb:
Road bikes with drop type handlebar
Triathlon, time trial or Speed Concept bicycle
Cruisers with large 26″ tires and swept-back handlebar, Bicycles that fold.
Rider weight limit of 300lbs:
Hybrid bicycles with 700c wheels, tires larger than 28c, and flat handlebars
City bicycles: hybrids with special equipment, cyclocross bicycles: with drop type handlebars, knobby 700c tires, and cantilever or disc brakes
Mountain bikes of all types including: standard, race, cross-country, heavy-duty, trail, all- mountain, freeride, and jumping bikes of both the hardtail and full suspension variety.
Combined Rider weight limit of 550lbs:
Tandem bicycles”
These weight limits are higher than many new cyclists expect them to be. In numerous forums, riders in the 225 to 250 weight range have asked others about whether they’re too heavy for a given bike. They may be at the upper range for some bikes, and could be a little too heavy for others. But plenty of bikes will accommodate riders of their size.
Bikes with lower weight limits include very lightweight carbon and titanium bikes designed for racing. Certain manufacturers limit such bikes to riders who are below 180 lbs.
Carbon bikes not designed to be extremely lightweight have higher weight limits. Specialized carbon frames, for instance, are designed with weight limits closer to those of steel and aluminum bikes. Specialized is very specific about the weight limits of their carbon bikes and components:
“All Specialized carbon frames, forks & components have a weight limit of 250 lbs.”
Folding bikes also have a lower weight limit than non-folding bikes. Bike Friday provides weight limit information for their folding bikes.
“Most Bike Fridays are designed with a rider weight limit of 220lbs. The exceptions are the petite models, which are designed for 125lb maximum rider weight, and the Pocket Rocket Pro and Crusoe, which are designed with a 190lb maximum rider weight.
Air bikes are designed for 200lb maximum rider weight. Up to 220 can be supported with heavy rider upgrade.
On special order, we can build bikes with heavy rider upgrades for riders over 220lbs. This does not include the Pocket Rocket Pro or the Crusoe.”
Recumbent bikes, for the most part, seem to have a weight limit of 300 pounds.
A few manufacturers don’t provide specific weight limits for their bikes. One such company is Jamis Bikes.
“Is there a weight limit to a JAMIS bicycle frame?
While we don’t post weight limits on our bike, when you exceed the average weight of an adult rider compared to its size, you need to exercise caution when riding and may require some different components to help the bike endure the additional weight.”
Jamis’s approach is to caution all riders whose weight is above average. However, they don’t specify how much the average adult rider weighs, leaving the cyclist to wonder whether he or she needs to use different components to make the bike endure additional weight. A statement like this makes Jamis appear confident in their frames’ ability to accommodate large riders. Rather than focusing on the weight limit of the frames, they advise larger riders to consider other factors. This is a good point.
One of the biggest problems facing heavy riders — people who fit bikes for larger riders will tell you — is not the frame but the wheels. Rims and spokes can break under the weight of a very heavy rider. To combat this problem heavier riders can opt for 36 spoke wheels and durable rims. Such rims should be thicker and wider than the typical rims found on stock bikes. Stainless steel spokes are also stronger than all steel spokes, due to the nickel content in stainless steel.
For riders exceeding the 300 lb limit for stock bikes, there are specialty bicycle companies who cater to very heavy riders. Super Sized Cycles carries an assortment of bicycles, electric bikes and tricycles that carry up to 550 pounds. These super sized bikes are made out of cromoly steel.
With all the hype over exotic materials like titanium and carbon as being the “strongest” frame materials, and aluminum as being lighter than steel, when it comes right down to it, steel, the old standby, may be the most durable frame material of all. According to companies who specialize in bikes for heavier riders, steel will not crack under the weight of a very heavy rider.
Large riders should always contact a manufacturer directly if no weight limit is included in a bike’s specifications or on the manufacturer’s website. Sometimes, instead of including this information as part of the bike’s specifications, manufacturers provide weight limit information on their website’s FAQ page. If after a little research, this information can’t be found, then a phone call or e-mail to the manufacturer is in order. It’s better to ask about a bike’s weight limit before buying a bike, than to buy it and then worry about the bike failing due to the rider’s weight.
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having had some experience in this area, I need to add a few things:
1) people worry about frames, but that’s not the main concern. frames are pretty study in general. the real problem is rear wheels, which bear the brunt of the weight. A heavy rider may pop spokes on a rear wheel that has few spokes or was poorly adjusted. I had this problem with two different bikes, and upgrading the wheel was the solution. So, if you are worried about “the weight limit for a certain bike” you should be looking at the rear wheel, not the frame. (of course, if you are 400#+, the frame may start to have trouble too)
2) please do not generalize to all folding bikes from the Bike Friday specs! I rode a Xootr Swift, which is rated for 260# and I weigh more than that. Now, it doesn’t fold up teensy like a Brompton or BF but you can take it on the subway or commuter rail. (And even BF makes a sturdier version of their bikes for a 260# rider for an extra $100 or so.)
3) in general, just like maximum PSI ratings, the weight limits published by manufacturers are designed to keep them from getting warranty claims and lawsuits. the bikes are probably good for a bit more weight than they are speced. that said, rear wheels are usually the first to go.
Thanks for the additional information. I agree about rear wheels bearing the brunt of a rider’s weight. Heavier riders should be aware of this problem. To avoid breaking spokes or rims, it’s probably best to upgrade the wheels when purchasing the bike.
Thank you for being considerate enough to write such an article. Many overweight people would like to get into cycling to get fit and they may be rather large when they go about beginning.
My personal concern, when it comes to weight capacity, is not so much the frame or even the weight on the wheels, but the pedals. Some bikes are just made cheap and if too much weight is put on the pedals they will strip out and fall off, eventually, if one stands on them for any number of reasons. I’ve had this happen with bikes and my brother (who is not a big guy like me) has had it happen to him as well. Granted, such a concern has more to do with poor machining and design than weight, but lots of manufacturers will cut corners if they know that a certain thread pattern is cheaper to manufacture than one which would increase the weight capacity by 20 pounds, or the durability by more than a year.
What sort of threading and pedal/crank construction would you recommend heavy people (and probably most people) look out for, in particular? Do you have any recommendations on the weak points of a bicycle which should be of particular concern to heavy riders who are shopping for a bicycle? Typical weak points which should be closely examined?
Thank you.
You’ve hit the nail on the head with your observation about some bicycles being made cheaply. That’s why you and your brother have had problems with pedals stripping out and falling off. With bicycles it’s not so much a question of the thread pattern as the quality of the parts. The other thing to consider is that manufacturers are obsessed with making bikes as light as possible. So they sacrifice durability for weight savings. To combat this problem, try to avoid parts designed specifically for racing because those are the least durable.
Mass produced bicycles usually come with cheap pedals. Often cyclists replace these pedals at the time of purchase. For larger riders, it’s important to work with a local shop to get pedal and crankset recommendations. Using the flimsy parts that come with some bikes can be a safety hazard.
You didn’t mention whether you’re planning to ride with clipless or platform pedals. For clipless, go with Look or Time pedals. They both make durable pedals which hold up better than the ones that come with component “groups.” For platform pedals, look for models that can be rebuilt. They are better made and last longer since they can be serviced.
As a general rule, steel and titanium are stronger than aluminum, which is the material most cranksets are made of. Aluminium is used due to its strength to weight ratio. It’s lighter than steel and less expensive than titanium. If you can’t afford titanium — or just don’t want to spend so much money on components — then consider getting steel cranksets. Be sure to purchase good quality steel. Cheap steel won’t be any stronger than aluminium. Steel is heavier than aluminium, but it’s also more durable. Unless you’re planning to race the bike, the additional weight won’t make any difference.
For heavy riders, the weak points are the wheels, and as you’ve pointed out, the pedals and crankset. Other than those items, heavy riders shouldn’t have any problems with bikes — although I recommend buying the best quality bike you can afford. Bikes are like anything else: you get what you pay for.
I hadn’t thugoht of changing the tires, that’s a good suggestion. Next time I’m in the bike shop getting some riding shorts and a bike pouch thing, I’ll have to take a look at tires.