In truth if we tested the strength of the same frame built from carbon and aluminum you would see that carbon fiber frames are much stronger per pound in terms of both stress tests and impact tests.
Carbon fiber bike frame weight limit.
However the size of the frame wheels and gears can change the weight.
Many regular bicycles have recommended weight limits of 250 to 300 lbs and some manufacturers make bikes especially for people over 300 lbs even as high as 550 lbs though you should expect to pay much more for a bike with a high weight limit.
Available in 700c 27 5 and 26 inch diameters for road mountain gravel and cyclocross the velocity clydesdale disc wheelset has a rider weight gear limit of up to 300 pounds.
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In comparison an aluminum bike can get very close to that weight limit.
One of the most discussed aspects of carbon fiber frames is the weight savings over aluminum frames.
A carbon fiber bike can be built under the 15 pound weight limit of the uci rules but most are produced at just 15 pounds so they re legal for competition.
The average carbon fibre road bike weight when taking an average of all carbon fibre bikes overall lands around 18 pounds 8 2kg.
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By creating frames from multiple monocoque structures for the head tube top tube down tube seat tube seatstays and one piece bottom bracket chainstay the carbon fibers are able to run continuously from tube to tube offering advantages in weight stiffness and strength.