Surly Midnight Special vs Marin Nicasio 3: Two Carbon Gravel Bikes - But Why the Big Price Difference?

Two carbon steel gravel bikes. Why one costs thousands more.

Choosing an adventure bike is a bit like choosing a good pair of boots. On paper they can look very similar - same materials, similar features - yet once you start digging into the details, the differences begin to show.

That’s exactly the case with the Surly Midnight Special Carbon and the Marin Nicasio 3.

At a glance both bikes tick many of the same boxes:

• Steel frames
• Carbon forks
• Carbon rims
• Hydraulic disc brakes
• Modern gravel capability

Yet one costs $3,299, while the other sits at $5,999.

In this blog we’ll break down where the differences actually lie and what each bike is designed to do best. If one of them resonates with you, the next step is simple - swing by the shop and take one for a ride.

Steel Frames: Similar Materials, Different Execution

Both bikes use chromoly steel, but the way that steel is used is quite different.

Surly Midnight Special

The Midnight Special uses 4130 Chromoly steel with Surly’s Natch tubing and a double-butted main triangle.

4130 is a high-strength alloy commonly used in performance steel frames. Because the material is strong, frame builders can use thinner butted tubing - thicker at the joints for strength and thinner through the middle to save weight and engineer in flex and responsiveness to create a more lively and comfortable ride feel.

Surly also internally coats the frame to protect against corrosion. The result is a frame that’s durable, lively, and comfortable when handling big miles over rough roads.

Marin Nicasio 3

The Nicasio uses Marin’s SteezyR CrMo steel. “CrMo” simply refers to chromium-molybdenum steel, a similar alloy family to 4130, but the tubing is typically produced with slightly thicker wall profiles to keep manufacturing efficient and affordable albeit a little bit stiffer.

Both frames ride beautifully. The Surly simply uses more refined tubing shaping and butting, which gives Surly greater control over the ride feel.

1x vs 2x Drivetrain: The Real Difference is on the Road

This is where the bikes begin to separate in terms of how and where they can ride.

Marin Nicasio 3

The Nicasio runs a 1x gravel drivetrain:

• Shimano GRX RX600 shifter
• GRX RX812 rear derailleur
• 42T chainring
• 11–42 cassette

1x systems are fantastic for gravel riding because they’re simple, reliable, and easy to maintain. With a narrow-wide chainring and a clutched derailleur you'll be less likely to drop a chain on rough terrain.

For us though, the 11-42 cassette is a bit of a weak point. With the large 42T chainring the bike is going to struggle up steeper climbs, especially when loaded for bikepacking or touring. You could drop to a 38T or 40T chainring, but then you risk spinning out around 30 km/h on the road.

Surly Midnight Special

The Midnight Special runs a 2x Shimano 105 12-speed drivetrain:

• Shimano 105 R7100 front and rear derailleur
• 50/34 crankset
• 11–34 cassette

The big advantage of a 2x drivetrain is range and efficiency. You get smaller jumps between gears and higher top speeds on the road. Both bikes offer the same climbing gear.

What this means in the real world is that the Midnight Special can comfortably keep pace on fast open roads while still offering low gearing for climbing gravel roads or loaded touring.

In many ways the Midnight Special is two bikes in one - part endurance road bike and part gravel machine.

Tyre Clearance: Road Speed Meets Gravel Capability

Another handy feature of the Midnight Special is its versatility when it comes to tyres.

The frame can run:

• 700c x 42mm tyres
• 650b x 50mm tyres
• Up to 27.5 x 2.35" without fenders

That means you can set the bike up in two very different ways:

• Fast road setup: 700c wheels with 32-35mm tyres for endurance road riding.
• Gravel adventure setup: go 650b or stick with the excellent 700c wheels but increase the tyre gauge - we like the Maxxis Rambler or Teravail Rutland for gravel roads and drop bar bikepacking.

The Marin Nicasio 3 also handles wider tyres nicely. It comes stock with 45mm Maxxis Reavers, making it a very capable gravel and adventure bike straight out of the box. The Surly simply pushes that versatility a little further.

Wheelset Quality: Carbon Rims Aren’t All the Same

Both bikes feature carbon rims, but the hubs and build quality make a significant difference.

Surly Midnight Special wheels

• Teravail Circos carbon rims
• DT Swiss 350 hubs
• DT Swiss Competition spokes

DT Swiss 350 hubs are widely regarded as one of the best hub platforms available. They use the DT Swiss ratchet system, known for durability, smooth engagement, and long service life. These hubs are commonly found in high-end custom wheel builds.

Marin Nicasio 3 wheels

• G24 carbon rims
• Novatec hubs
• 14g spokes

Novatec hubs are reliable and widely used on mid-range wheelsets. They perform well and keep the cost of the bike much lower, but they do not quite reach the long-term durability and serviceability of the DT Swiss system.

The Surly wheelset is closer to a premium custom build, while the Marin focuses on delivering carbon wheels at a very accessible price.

Finishing Kit and Details

When you look closely, the finishing kit also reflects the different positioning of the bikes.

Surly Midnight Special

• Teravail cockpit
• WTB Volt saddle
• Stainless Surly seat clamp
• Teravail Rampart tubeless tyres

Marin Nicasio 3

• Marin alloy cockpit
• Marin saddle and finishing kit
• Maxxis Reaver gravel tyres

Both are perfectly functional setups, but the Surly includes more premium finishing details across the build.

So Why Is the Surly More?

The difference isn’t just one part. It is the combination of upgrades across the bike.

The Midnight Special includes:

• More refined double-butted tubing
• Shimano 105 12-speed drivetrain
• Premium DT Swiss 350 hubs
• Higher-end carbon wheel build
• Arguably a more versatile 2x gearing system considering the Marin does not have a wide range cassette

The Nicasio focuses on excellent value and simplicity, while the Surly leans into performance and versatility.

Which One Should You Choose?

Marin Nicasio 3

Perfect if you want:

• Outstanding value for money
• Carbon wheels at an approachable price
• A capable gravel and adventure bike
• A simple and reliable 1x drivetrain

Surly Midnight Special

Perfect if you want:

• A steel bike that rides beautifully on road and gravel
• The efficiency of a 2x drivetrain
• A premium wheelset with DT Swiss hubs
• A bike that can handle road rides, gravel adventures and touring

Next Steps

The next best way to understand the difference between these bikes is to ride them back to back. Swing by Bicycle Junction, we’ll get you out for a spin.

Once you feel the difference in gearing, ride feel, and handling, the decision usually becomes pretty clear.