Add up rider, bike and cargo, then compare the total against the figure makers typically publish for that kind of bike. Your own manual has the number that counts.
Inputs
Urban, commuter, hybrid bikes
Weight Check
0120 kg limit
77%
Safe
of 120 kg typical published figure
Breakdown
Rider weight70 kg
Bike weight12 kg
Cargo weight10 kg
System weight92 kg
Typical published figure120 kg
Remaining cargo28 kg
This calculator is for reference only. Where each figure comes from is set out below, and no calculator knows what your own frame is rated for. Always use your own judgement when making equipment decisions.
Sources for the two test masses: US CPSC, Summary of Electric and Non-Powered Bicycle Standards. The kilogram figures per category are the published limits of Canyon, Merida and Specialized, each named beside its row. No standard publishes a system weight limit per bicycle category.
How it works
Your Manufacturer Sets the Limit, Not a Standard
The weight limit for a bicycle is set by the company that built it and is printed in the manual for that model. ISO 4210, the international bicycle safety standard, does not publish a maximum system weight for any category of bicycle. It specifies the tests a bicycle has to pass. System weight means the total of rider, bike, and all cargo combined.
Why 120 kg is the number everybody repeats
Two figures do appear in the standards, and both are test conditions rather than ratings. ISO 4210 loads a bicycle to a combined 100 kg (220 lb) of bicycle and simulated rider for its brake tests. EN 15194, the standard for pedal assisted bikes, uses 120 kg (265 lb) for the same tests. A bicycle that passes has been tested at that mass; it has not been rated to carry it.
Typical published figures, by category
These are the lowest figures we could find published by a named maker for each kind of bike. Your model may carry a different one, and the manual is what decides.
Racing / road bike: 120 kg. Canyon and Merida both publish 120 kg for road bikes.
Mountain bike (hardtail): 120 kg. Canyon publishes 120 kg for mountain bikes; Specialized rates many frames to 136 kg.
Full suspension MTB: 120 kg. Canyon publishes 120 kg for mountain bikes; Specialized rates many frames to 136 kg.
Trekking / city bike: 120 kg. Merida publishes 120 kg for trekking and 100 kg for city bikes.
E-bike (EPAC): 140 kg. Merida rates its pedelecs to 140 kg in the manual.
Cargo bike: 250 kg. EN 17860 class for single track carrier cycles; multi track runs to 300 kg and heavy carrier cycles to 650 kg.
What counts as system weight
System weight includes everything: your body weight, clothing, helmet, shoes, the bike itself, panniers, bags, child seats, and any cargo. Even a water bottle adds to system weight.
Makers differ from one another on the same kind of bike, which is the clearest sign that the figure belongs to the model and not to a category. Merida publishes 100 kg for a city bike and 140 kg for a pedelec. Specialized rates many frames to 136 kg and says to read the manual for the specific bike. Merida's pedelec manual leaves a blank field, Permissible overall weight, for the dealer to fill in per bicycle.
System Weight = Rider + Bike + Cargo
The calculation is straightforward: add your body weight, the bike's weight, and all cargo. The tricky part is being accurate about what counts as cargo.
What to include as cargo
Panniers or bags and their contents (clothes, food, tools).
Child seats and children.
Accessories: pump, lock, lights (if heavy).
Full water bottles and hydration packs.
Your clothing, helmet, shoes, and cycling kit.
Weighing accurately
Weigh your loaded bike on bathroom scales by lifting the bike while standing on them, then subtract your body weight. Or use luggage scales on each loaded bag and add them up.
The 85% rule
Staying under 85% of your bike's published limit gives a margin for sudden loads and rough terrain impacts. The 85 percent threshold is this site's own convention and appears in no standard and no manual.
Why Overloading is Dangerous
Bicycle frames are designed with specific fatigue limits. Exceeding the system weight your maker publishes does not cause immediate failure. Instead, it accelerates metal fatigue at stress points (welds, joints, dropout) and the failure can occur unexpectedly after many miles.
Structural risks
Frame cracking: Fatigue cracks develop at welds and joints under repeated loading cycles.
Fork failure: The fork is particularly vulnerable. A sudden failure at speed can be fatal.
Wheel failure: Overloaded wheels develop broken spokes and rim cracks.
Brake fade: Heavier system weight requires more braking force, generating more heat and extending stopping distances.
Warranty and insurance
Bicycle manufacturers commonly void the frame warranty if the system weight they publish is exceeded, and that figure is theirs rather than a standard's. If you are in an accident while overloaded, your cycling insurance may refuse the claim.
If you regularly carry heavy loads, the right solution is a purpose-built cargo bike rather than an overloaded trekking bike. Cargo cycles have their own standard, EN 17860, published in 2024 and 2025, which sets classes by allowed total weight: single track carrier cycles to 250 kg, multi track to 300 kg and heavy carrier cycles to 650 kg.
Where these numbers come from: not from a standard. ISO 4210 publishes no maximum system weight for any category of bicycle. No part of it contains such a table, Part 6 is the frame and fork test methods rather than anything about cargo bikes, and delivery bicycles are excluded from the scope of Part 2 altogether. The two masses that do appear in the standards, 100 kg in ISO 4210 and 120 kg in EN 15194, are the combined bicycle and simulated rider mass in the brake tests and nothing more. Every kilogram figure in the table above is a number a named manufacturer publishes, listed beside it, chosen as the lowest we could find for that kind of bike so that the comparison errs low. The cargo figures are the classes in EN 17860. The 85 percent caution threshold is our own convention. Your own manual overrides everything here, and for many bikes it is the only place the number exists.
Frequently asked questions
What is the maximum weight for a road bike?
Canyon and Merida both publish 120 kg as the maximum overall weight of rider, bike and luggage for their road bikes, and that is the figure this calculator compares against. It is a manufacturer limit, not a standard: ISO 4210 sets no maximum system weight for road bicycles. Other makers differ, and Canyon adds that fitted components can lower it further, so the manual for your own bike is the number that counts. For a rider on an 8 kg bike, 120 kg leaves 112 kg for rider, clothing and everything carried.
What is ISO 4210 for bicycles?
ISO 4210 is the international standard for bicycle safety. It specifies the tests a bicycle has to pass and the requirements it has to meet, across nine parts covering brakes, steering, frame and fork, wheels, pedals and saddles. It divides bicycles by maximum saddle height into city and trekking, young adult, mountain and racing, and it excludes delivery bicycles, recumbents, tandems and BMX from Part 2. It does not publish a maximum system weight per category. The one mass it names, 100 kg of bicycle plus simulated rider, is the load used in its brake tests.
How much can I carry on a cargo bike?
Cargo cycles have their own standard, EN 17860, published in 2024 and 2025, which sorts them into classes by allowed total weight: single track carrier cycles up to 250 kg, multi track up to 300 kg, and heavy carrier cycles up to 650 kg. Those are class boundaries rather than a rating your bike carries. ISO 4210-6 is the frame and fork test methods and has nothing to do with cargo bikes. Individual models vary widely, so check the maximum load your maker specifies for your bike.
Does exceeding the bike weight limit void the warranty?
Commonly yes, but the limit that governs is your manufacturer's, not a standard's. Makers publish a system weight for each model and tie the frame warranty to it, so a frame that cracks while loaded beyond that figure is usually not covered. This matters most for carbon frames, which can fail without warning beyond their design load, while steel and aluminium tend to deform visibly first. Specialized states the limit is determined by its own lab testing and tells riders to read the manual for their specific bike.
How do I calculate system weight for my bike?
System weight = rider weight + bike weight + weight of everything attached to the bike. This includes: full water bottles, saddle bag, panniers and their contents, child seat (with child), trailer hitch, lights, lock, computer, and any other accessories. Use your weight in cycling kit (including shoes, helmet, clothing) not just your body weight. Even small items add up. A typical touring setup can easily add 10 to 15kg above the empty bike weight.
What is the weight limit for a trekking bike?
Merida publishes 120 kg for trekking bikes and 100 kg for city bikes, and this calculator uses 120 kg for the category. No standard sets the figure: ISO 4210 groups city and trekking bicycles by saddle height and specifies tests, not a load rating. For an 85 kg rider on a 15 kg trekking bike, 120 kg leaves 20 kg for cargo and accessories, which full front and rear panniers at 15 to 25 kg can already exceed. Check your own manual, because makers differ on the same kind of bike.
Can I exceed the weight limit if my frame feels strong?
No, and the limit to respect is your manufacturer's rather than ISO's, because ISO publishes none. A published weight limit reflects the load a maker has tested the frame to carry, not how the bike feels to ride. A frame that feels solid and shows no visible damage may still be developing fatigue cracks at stress concentration points. Metal fatigue from repeated overloading accumulates and can cause sudden failure without warning.
How does overloading affect bike safety?
Overloading affects braking performance (harder to stop heavier loads, especially on the front brake), handling (high loads raise the centre of gravity, increasing tip-over risk), tyre integrity (tyres may exceed their maximum pressure rating under the load), and long-term structural integrity through accelerated fatigue of the frame, fork, wheels, and headset bearings. On downhill sections, the consequences of a component failure under overload are severe.