Choose the right bike, then make it fit
Start with how you ride, then use the bike size calculator for a first estimate. The complete bike fitting guide explains how to refine contact points before you compare bikes.
Jump to the help you need
Every section starts with the clearest next action, followed by deeper guides and tools.
Find your starting bike size
Start with height and inseam, then refine the recommendation for your bike type and body proportions.
Bike frame size chart by height
Use the quick-reference chart to match your height to road, mountain, hybrid, and kids bike sizes.
Calculate your bike frame size
Enter height and inseam for a more personal road, mountain, or hybrid frame recommendation.
Calculate a road bike frame size
Performance-focused sizing for speed and efficiency on pavement. Optimized for aerodynamics and power transfer.
Bike sizing for first-time riders
New to cycling? Find a practical bike size range with our beginner guide. Learn about inseam measurement, standover height, and how to choose your first bike.
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Check the brand chart before you buy
A Medium is not universal. Compare the manufacturer range after you have a starting frame size.
Set up the bike to fit your body
Frame size is the start. Adjust saddle position, reach, bars, and contact points for comfort and control.
Mountain bike and e-bike sizing
Account for standover clearance, trail geometry, control, motor weight, and step-through frames.
Mountain bike sizing, standover, and trail geometry
Master mountain bike sizing with trail geometry, standover clearance, and professional MTB calculations.
Calculate a mountain bike frame size
Trail-optimized sizing with proper standover clearance and geometry for off-road riding. Perfect for XC, trail, and enduro bikes.
Calculate an e-bike frame size
Size your electric bike correctly considering motor type, battery placement, frame style options including step-through designs.
E-bike sizing and step-through fit
E-bike sizing guide covering motor weight, step-through frames, battery placement, and how electric assist changes bike fit. Find your perfect e-bike size.
Choose a safe kids bike size
Match wheel size to the child now, leave sensible room for growth, and keep safe starts and stops the priority.
Kids bike sizes by age, height, and inseam
Find the perfect kids bike size with age-based sizing, safety considerations, and growth planning.
Calculate a child's bike wheel size
Age and height-based sizing specifically designed for children's bikes. Accounts for growth and development to ensure safety and comfort.
Compare kids bikes by age and inseam
Top kids bike picks from balance bikes to 24' wheels - sized stage-by-stage with picks from Woom, Specialized, Trek, and more.
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Dial in saddle, cockpit, and wearable fit
Use body measurements to choose contact-point sizes, then fine-tune one change at a time.
Measure sit bones and choose saddle width
Find your perfect saddle width. 4 ways to measure sit bones, match saddle width to riding style, and pick between cutout, split-nose, and flat designs.
Calculate saddle width from sit-bone width
Turn sit-bone width into a target saddle width in mm, plus the closest stocked widths from Specialized, Bontrager, Fizik, Selle Italia, and Ergon.
Calculate saddle height with three fit methods
Calculate optimal saddle height using multiple professional methods including 109%, Hamley, and LeMond formulas for perfect pedaling efficiency.
Understand reach, stack, and cockpit comfort
Use reach and stack to compare bike geometry, set cockpit position, and choose between sizes without guessing from frame labels.
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Choose the right bike before comparing models
Narrow the bike type and intended use first. Then compare geometry, brands, and buying options.
Keep riding safely after the purchase
Use practical maintenance, safety, legal, shipping, and coaching resources throughout bike ownership.
Confirm the fit before committing to a bike
Check the manufacturer chart, compare standover and reach, and test ride when possible. Between sizes, choose based on body proportions, mobility, and riding position—not height alone.