61 products
Medium Frame
Buying guide
Medium frame adult bikes
Medium is the most common adult bike size. Browse reduced mountain, hybrid and electric bikes from Claud Butler, Boss, Dawes and Falcon, all in medium frames.
Sizing
Medium frames usually measure 17 to 18 inches on mountain bikes. As a rough guide they suit riders around 165 to 180cm (5ft 5in to 5ft 11in).
Who it suits
Average height adults looking for a versatile bike for commuting, fitness rides or weekend trails.
Not sure on size?
Measure your inside leg in socks against a wall, then compare it with our frame size chart or try the Bike Finder for a quick match.
Free UK delivery on bikes
90-day returns · 12-month warranty
0% finance · Clearpay · Cycle2Work
Not sure which one's right?
Answer four quick questions and our Bike Finder will match you to the perfect ride from this range.