Last Updated: April 28, 2026 700c is the standard road bike wheel size — a 622 mm bead-seat diameter, with tire widths from 23 mm (race) to 50+ mm (gravel). It’s the same wheel size as 28-inch hybrids and most modern gravel bikes. The “c” refers to a French 19th-century tire-width designation that’s largely obsolete … Continue reading What Is A 700c Wheel? Everything You Need To Know