“700c” is a wheel/tire size designation. In modern terms, it refers to rims with a 622 mm bead seat diameter (often shown as ISO/ETRTO “622”). You’ll see 700c on most adult road, hybrid, and gravel bikes on this page.

• Where to check: Look on your tire’s sidewall for markings like 700x32c or 32-622.
• What varies: Tire width and tread (not the rim diameter) vary—for example, 25 mm for fast pavement vs. 40+ mm for mixed terrain.
• Buying tip: Match the 622 diameter and choose a width your frame, fork, and rims can accommodate.

They often point to the same rim diameter—622 mm—just expressed differently. The difference is usually tire width and intended use, not the core rim size.

• 700c / 28-inch: Common for road and hybrid bikes, typically with narrower tires.
• 29-inch: Used in mountain biking for wider, higher-volume tires on the same 622 mm rim.
• Fit depends on clearance: Wider tires may not clear some frames, forks, or fenders.
• Confirm with ETRTO: Numbers like 35-622 (28/700c) and 54-622 (29x2.1) share the 622 rim.

When mixing terms, always verify the ISO/ETRTO marking and your bike’s clearance.

In everyday bike shopping, “700” is often used as shorthand for “700c,” the modern standard with a 622 mm rim diameter. Historically, there were other 700 designations (like 700A/700B), but they’re uncommon today.

• Modern usage: Most adult road, hybrid, and gravel bikes listed as 700 use 700c rims.
• Verify by numbers: Check the tire or rim for ISO/ETRTO “622,” which confirms 700c.
• Shopping tip: When choosing tires/tubes, match the 622 diameter and compatible width range printed on the product.

If you’re unsure, the size on your current tire’s sidewall is a reliable guide.

29-inch mountain tires and 700c road/hybrid tires typically share the same rim diameter (ISO 622), so many 29-inch tires can mount on 700c rims. Compatibility depends on width and your bike’s clearances.

• Check the ETRTO: A 29x2.0 tire might read 50-622, which fits a 622 rim.
• Rim-tire match: Very wide tires may not be ideal for narrow road rims; follow the rim’s recommended width range.
• Frame/fork clearance: Ensure there’s room for the taller, wider casing, especially with rim brakes, fenders, or tight stays.
• Ride goals: Wider tires add comfort and grip but can add weight and rolling resistance.

You can find 700c tubes and tires under Bike Parts and Bike Accessories on Walmart. To pick the right ones, match a few key details from your current tire.

1. Size marking: Look for 700x35c or ETRTO like 35-622 on your tire.
2. Tube width range: Choose a tube that covers your tire’s width (e.g., 28–35 mm).
3. Valve type: Presta or Schrader to match your rim and pump.
4. Tread style: Slick for pavement, semi-slick for commuting, or knobby for gravel.

Availability and pickup or delivery options can vary by location, so it’s helpful to check local stock before heading to the store.