Loading a bike is simple until you overdo it. This tool compares what you carry with the limits you enter for your rear rack, front basket or rack and the whole bike, then checks how evenly the load is balanced. It runs entirely in your browser: nothing you type is sent anywhere.
Check your bike's carry load
Enter your loads and press Check the load. Your results will appear here.
This tool compares your numbers with the limits you enter. It does not know your bike's real limits, so always use the ratings printed on your bike, rack, basket and bags, and never exceed them. Weigh your gear on a scale instead of guessing.
How the check works
You enter the weights in pounds, and the limits come from you. The tool does the following:
- Rear rack: adds the left pannier, the right pannier and anything on top, and compares the total with the rack's rated capacity. It flags a load above the rating, and one above about 85 percent of it as close to the limit.
- Left and right balance: compares the two panniers. A difference of two pounds or less, or up to about 10 percent of the pair's total, counts as balanced. Larger gaps are flagged.
- Front load: compares a front basket or rack load with its rating. Many handlebar baskets have low limits, so check the label.
- Handlebar bag: flags loads above about five pounds, since weight on the handlebars slows the steering. This is a rule of thumb, and each bag has its own limit.
- Distribution: if you carry at least 20 pounds, checks how much is over the rear wheel. A very rear-heavy bike can feel unstable.
- Total weight: adds the rider, the bike and the cargo, and compares the result with the bike's maximum total weight. Many bikes list one in the manual or on the maker's website. An e-bike's limit can be different from a regular bike's.
How to get good numbers
- Weigh your gear. A bathroom scale works. Guessing is how people end up overloaded.
- Find the ratings. Racks, baskets and bags often have a rated load printed on them or in the manual. If you cannot find a rating, ask the maker before you load it up.
- Do not count on the rack alone. The seat post, frame and wheels also carry weight.
- Include everything. Water bottles, locks, tools and food add up.
Packing to ride better
- Keep heavy items low and close to the center of the bike.
- Balance left and right, and front and rear where possible.
- Secure everything, so loads do not shift or swing.
- Keep clear of the wheels and brakes with straps and cords.
- Test the ride in a quiet place before heading into traffic.
- Brake earlier. A loaded bike takes longer to stop.
Limits of the tool
It cannot know your bike's real limits. It does not account for rough roads, which multiply forces, or for how a given pannier or rack is built. A "Good" result means your numbers are inside the limits you typed, not that the setup is certified safe. Always follow the ratings from the maker.
Frequently asked questions
What is a typical rear rack capacity?
It varies a lot, so check yours. Many racks list a rated load in pounds, and some are rated for more than others. Never assume.
Why does left-right balance matter?
A lopsided load pulls the bike to one side and makes steering harder, particularly at low speeds and when braking.
Does this tool save or share my numbers?
No. The calculations happen in your browser and nothing is stored or sent.
Where do I find my bike's maximum weight?
In the owner's manual or on the maker's website. If it is not listed, ask the maker or a bike shop.
Can I use this for an e-bike?
Yes, as long as you enter the e-bike's own limits, since it is heavier and its ratings differ.
