A few years ago, the gravel world was buzzing about the 650B wheel size. Gravel bikes were booming, riders were venturing off the tarmac into adventure territory, and 650B wheels paired with high-volume tires were seen as the perfect formula for comfort, control, and capability on unpredictable terrain.

Fast forward to 2025, and the landscape has shifted. Gravel bikes are now better designed, tire technology has improved, and more and more frames can accommodate 700x45mm tires or even wider. The result? A new question has emerged: Do we still need 650B wheels in a world where 700c can do it all?

This article dives into the real differences between 650B and 700c, explores where each makes sense (or doesn’t), looks at how the cycling industry is adapting, and helps you make the right choice whether you’re a gravel racer, bikepacker, or weekend explorer. And throughout, we’ll show how Elitewheels is staying ahead of this shift in gravel wheel standards with purpose-built designs that cater to performance, versatility, and rider needs.

What Are 650B and 700c?

Before going deeper, let’s clarify what we’re talking about.

• 650B(also known as 27.5-inch): A smaller-diameter wheel originally popularized in touring and later mountain bikes. On gravel bikes, it’s typically paired with wider tires around 47mm to 2.1” (53mm).
• 700c(the road standard): A larger-diameter wheel that traditionally used narrower tires (28–35mm). But modern gravel bikes now support much wider tires up to 45mm or more on 700c rims.

The main idea is this: you can achieve similar tire volume on 650B by running a wider tire, while 700c offers smoother rolling efficiency with larger diameter even when fitted with relatively wide tires like 700x45mm.

The Rise of 650B in Gravel

When gravel cycling first exploded in popularity, many frames couldn’t fit 700x40mm+ tires. Riders who wanted more grip, cushion, and clearance began to turn to 650B wheels, which allowed wider rubber without needing a larger frame.

650B wheels helped:

• Improve ride comfort on rough roads and trails
• Enable smaller bikes to avoid toe overlap
• Allow riders to run very wide tires (47mm–2.1”) on compact frames
• Increase traction and control for bikepacking and off-road exploration

Brands like Salsa, Cannondale, Bombtrack, and All-City embraced 650B as part of their gravel DNA. For a while, it seemed like 650B was the future of adventure cycling.

Why 700c Tires Are Getting Wider

But technology evolves and quickly.

Manufacturers started designing gravel frames with more tire clearance. Forks got wider. Bottom brackets and chainstays adapted. Now, many new gravel bikes come with support for 700x45mm or larger tires right out of the box.

This has major implications:

• The performance gap has narrowed. A 700×45 tire gives similar volume and comfort to a 650Bx47, but maintains better rolling efficiency.
• One wheel size fits more riding styles. From road to gravel to light trail, 700c setups can now handle it allwithout the drawbacks of smaller wheels.
• Wider tire options are now mainstream. Riders can enjoy the benefits of high-volume tires without sacrificing the speed and feel of a larger wheel.

Real-World Performance: Where 650B Still Works

While 700c wheels with 45mm tires are becoming dominant, 650B hasn’t disappeared. There are specific scenarios where it still makes a lot of sense:

1. Small Bike Frames

For riders under 5’5” (165 cm), fitting wide 700c tires can cause toe overlap and awkward geometry. 650B wheels solve this by shortening the wheel radius, which helps preserve safe and nimble handling on compact frames.

2. Technical Terrain

When the ride turns gnarly—think loose singletrack, chunky fire roads, or overgrown trails—the extra volume of a 650Bx2.0”+ tire offers better traction and absorbs trail chatter better than many 700x tires.

3. Bikepacking and Overlanding

Riders going on long, loaded tours often appreciate the soft feel and control of 650B. Larger tires on a smaller wheel offer excellent stability when carrying heavy gear, which is why bikes like the Bombtrack Hook EXT or Otso Fenrir remain 650B-first.

4. Playful, MTB-Inspired Riding

Some gravel riders want a nimble, responsive ride for twisty trails. The smaller 650B wheels accelerate quicker, corner faster, and give a more lively feel—traits shared with 27.5” mountain bikes.

The Gravel Racing Scene: 700c Dominates

When it comes to racing, efficiency wins and that’s why nearly every elite gravel racer uses 700c wheels with tires between 40 and 45mm. Whether at Unbound Gravel, Gravel Earth Series, or the Migration Gravel Race, 700c setups offer faster rolling, better momentum, and lower resistance.

This trend reflects real rider preferences:

• Rolling resistance matters.Bigger wheels maintain speed better over distance.
• Tubeless tech has matured. Flats are rare with today’s high-quality gravel tires and sealants.
• Carbon gravel wheels are optimized for wide 700c setups. Brands like ENVE, Zipp, and Elitewheels have released wheels with wide internal rims tailored for modern 700×40–50mm tires.

For example, Elitewheels’ Drive G36 wheelset is purpose-built for gravel speed and control. With a 24mm internal width and 700c format, it pairs perfectly with 700×40–45mm tires, maximizing sidewall support and ride quality.

The carbon layup balances stiffness with shock absorption, making it a favorite among riders who want one wheelset that can do it all—race, train, and explore.

The Market Speaks: Industry Moving Away from 650B

Looking at recent releases and trends, it’s clear the cycling industry is moving away from 650B:

• Fewer new bikes offer dual compatibility.Bikes like the Cannondale Topstone Carbon and Trek Checkpoint now focus almost entirely on 700c.
• Tire brands are narrowing 650B offerings. Most new gravel tires especially those with advanced casings and treads are launched in 700c first, with limited or no 650B versions.
• Wheel manufacturers are focusing R&D on 700c. The demand is strongest here, especially in high-end carbon offerings.

Elitewheels, for example, has shifted its gravel wheel development primarily toward 700c. The Marvel G35 and Marvel G36 both target riders using 700×38 to 50mm tires, offering a balance of comfort, tubeless reliability, and aerodynamic efficiency.

What Riders Should Consider Before Choosing

Choosing between 650B and 700c shouldn’t be based solely on trends. Instead, think about how and where you ride:

• Do you ride mostly smooth gravel and pavement? 700c with 40–45mm tires is ideal for efficiency and comfort.
• Is your frame on the smaller side? 650B may still offer better geometry and handling.
• Are you tackling rough trails or bikepacking with gear? The added volume and control of 650B can still be valuable.
• Do you want wheelset compatibility with your road bike? 700c makes more sense, especially if you swap wheels between bikes.

If your frame fits 700x45mm tires, there’s little reason not to go that route unless your riding style demands something specific.

Wide Rims: The Unsung Hero of Gravel Performance

Regardless of wheel size, rim width plays a crucial role. As tires get wider, the internal rim width must keep up to maintain sidewall support and proper tire profile.

This is where brands like Elitewheels stand out. Their Drive G36 and Marvel G35 gravel wheels feature wide internal dimensions (24mm and 23mm, respectively), optimized for tires between 38mm and 50mm.

Benefits of wide rims include:

• Better cornering stability
• More precise tire shape and contact patch
• Reduced risk of burping with tubeless setups
• Improved ride quality at lower pressures

These are critical if you’re running high-volume tires whether on 650B or 700c.

The Verdict: Is 650B Still Worth It?

Yes, but only for certain riders.

If you’re riding a modern gravel bike with clearance for 700x45mm tires and you’re not limited by frame size or terrain, 700c is almost certainly the better option. It’s faster, more efficient, and gives you access to a wider range of tires, wheels, and performance features.

But if you’re a smaller rider, a dedicated bikepacker, or someone who loves technical off-road trails, 650B still holds value. Just be aware that tire and wheel options may continue to dwindle.

The good news? Modern wide 700c tires are more capable than ever and thanks to wheelset innovation from brands like Elitewheels, riders no longer have to choose between comfort and speed.

Ride What Fits You

There’s no one-size-fits-all answer in gravel cycling. The right wheel size depends on your bike, terrain, and goals. But the tide is turning, and for most cyclists, 700x45mm on wide rims delivers the best of both worlds.

650B had its moment and it helped push gravel forward. But with the rise of high-volume 700c tires, most riders now get better performance without compromise.

Looking for a race-ready carbon gravel wheelset to match modern tire widths? Consider the Elitewheels Drive G36 designed for wide tubeless tires, adventure versatility, and real-world speed.