DT Swiss ARC 1100 DiCut 85 Rear Wheel Review: Is This the Ultimate Aero Carbon Rear Wheel for Speed?
In the modern era of road cycling, the quest for speed has moved beyond mere weight savings and into the invisible realm of fluid dynamics. Whether you are a dedicated time trialist, a triathlete chasing a Kona slot, or a road racer looking to hold a 50km/h breakaway, your biggest enemy isn’t gravity-it’s air.
The DT Swiss ARC 1100 DiCut 85 Rear Wheel represents the pinnacle of this aerodynamic pursuit. Developed in collaboration with the aerodynamicists at Swiss Side, this wheel isn’t just deep; it’s a highly engineered piece of carbon fiber designed to manipulate airflow to your advantage. But does an 85mm rim depth make sense for the average performance rider, or is it a specialized tool for the elite?
In this comprehensive review, we go under the hood of the DT Swiss ARC 1100 DiCut 85, examining its construction, hub internals, and real-world handling characteristics to see if it truly is the “ultimate” aero rear wheel.
Quick Verdict: The Speed Specialist
| Feature | Specification |
|---|---|
| Best For | Time Trials, Triathlons, Flat Stage Racing, High-Speed Criteriums |
| Not Ideal For | Steep Mountain Climbs, Novice riders in heavy crosswinds |
| Overall Rating | 9.6 / 10 |
| Price Category | Premium / Professional |
| Wheel Type | Carbon Clincher / Tubeless Ready |
| Disc Compatibility | Center Lock |
| Weight (Rear) | Approx. 942g |
| Rim Depth | 85mm |
| Freehub Options | Shimano RD. 11SP Light (SRAM XDR included) |
| Hub Technology | 180 DICUT with Ratchet EXP 36 & SINC Ceramic |
Why Trust This Review?
This evaluation is built on a foundation of professional mechanical experience and deep industry knowledge. We analyze the DT Swiss engineering blueprints, the Swiss Side aerodynamic white papers, and combine them with the established physics of cycling performance. We don’t just look at the decals; we look at the bearing tolerances, the rim’s laminar flow properties, and the mechanical reliability of the Ratchet EXP system.
Product Overview: Engineering the Wind
The DT Swiss ARC (Aero Road Carbon) series is segmented into two tiers: the 1400 and the flagship 1100. The DT Swiss ARC 1100 DiCut 85 sits at the very top of the hierarchy.
At its core, this wheel is a collaboration. DT Swiss provides the world-class hub and spoke manufacturing, while Swiss Side-led by former Formula 1 engineers-provides the aerodynamic shape. The “VU-shape” rim profile (a hybrid between V-shape and U-shape) is the result of thousands of hours of CFD (Computational Fluid Dynamics) simulations.
The 85mm depth is the deepest in the ARC lineup, specifically designed for “maximum sailing effect.” This phenomenon occurs when the wind hits the deep rim at specific yaw angles, effectively creating forward thrust and reducing the total drag of the bike and rider system to near-zero or even negative values in ideal conditions.
Key Features: The Anatomy of Speed
1. The Carbon Aero Rim: VU-Shape Mastery
The 85mm rim is constructed from high-modulus carbon fiber, striking a delicate balance between lateral stiffness and weight. While 85mm sounds daunting, the internal rim width of 20mm is optimized for 25mm to 28mm tires, following the modern trend of wider rubber for lower rolling resistance and better grip.
- Efficiency: The depth ensures that airflow remains attached to the rim longer, reducing the “wake” behind the wheel.
- Stiffness: As a mechanic, I’ve noted that deep rims are inherently stiff. This translates to exceptional power transfer during out-of-the-saddle sprints.
2. Swiss Side Aerodynamics & The Sailing Effect
Aerodynamics is about more than just being “slippery.” It’s about stability. The ARC 1100 85 utilizes Swiss Side’s Aero+ concept, which focuses on:
- Translational Drag: Reducing the frontal resistance.
- Rotational Drag: Minimizing the friction of the wheel spinning through the air.
- Steering Torque: Even though this is a rear wheel, its profile affects the bike’s overall center of pressure, ensuring the rider doesn’t feel “pushed” around by gusts.
3. 180 DiCut Hub with Ratchet EXP 36
The heart of the wheel is the DT Swiss 180 DICUT hub. Unlike the cheaper 240 or 350 models, the 180 is machined to be as light as possible.
- Ratchet EXP 36: This is DT Swiss’s patented freehub system. By integrating the inner ratchet into the hub shell and using a single spring, they’ve reduced parts, decreased weight, and increased the distance between bearings. This results in a stiffer hub axle and longer bearing life.
- Engagement: With 36 points of engagement (10 degrees), the pickup is snappy enough for racing without the excessive drag of higher-engagement mountain bike hubs.
4. SINC Ceramic Bearings
Standard on the 1100 series, SINC ceramic bearings are a “marginal gain” that adds up over a 180km Ironman bike leg. These bearings are manufactured to incredibly tight tolerances, reducing friction to the absolute minimum and offering superior corrosion resistance compared to standard steel balls.
5. Tubeless Ready & Compatibility
The ARC 1100 follows the modern Hooked rim design. This is a crucial distinction. While some brands are moving to hookless, DT Swiss retains the hook, allowing for higher tire pressures and compatibility with a much wider range of tires.
- Drivetrain: Ships with a Shimano/SRAM 11-speed freehub, but usually includes a SRAM XDR driver in the box.
- Braking: Center Lock disc interface—the gold standard for heat dissipation and ease of maintenance.
Real Riding Performance: What It Feels Like at 45km/h
Climbing
Let’s be honest: you don’t buy an 85mm wheel for the Alps. At nearly 950g for the rear wheel alone, you will feel the rotational inertia when the gradient ticks above 7%. However, on “power climbs”—short, punchy rollers where you can carry momentum-the stiffness of the ARC 1100 is an asset.
Sprinting
This is where the DT Swiss ARC 1100 DiCut 85 shines. When you kick for the finish line, there is zero perceptible lateral flex. The T-head spokes and the deep carbon walls ensure every watt is converted into forward motion.
Crosswinds & Handling
One might expect an 85mm rim to act like a sail-and it does, but in a controlled way. Thanks to the Swiss Side profile, the wheel doesn’t “snap” when a gust hits. Instead, it feels like a steady pressure. For experienced riders, this is predictable and manageable. For lighter riders (under 65kg), a shallower front wheel (like the ARC 62) paired with this 85mm rear is the “pro setup” for stability.
Endurance & Vibration Damping
Carbon wheels have a reputation for being harsh. However, when paired with a 28mm tubeless tire at 70-80 PSI, the ARC 1100 85 surprisingly mutes “road buzz.” It’s a “thrumming” sensation rather than a “rattling” one.
The Advantages: Why Choose the ARC 1100?
- World-Class Aerodynamics: Arguably the fastest 80mm+ rear wheel on the market in terms of drag-to-stability ratio.
- The Ratchet EXP Hub: Mechanically the most reliable freehub system ever designed. Simple to service with no special tools required.
- SINC Ceramic Bearings: Saves watts and provides a “buttery” ride feel that lasts for seasons.
- Build Quality: DT Swiss wheels are hand-built. The spoke tension is incredibly uniform, meaning the wheel stays true even after hitting a few inevitable potholes.
- Versatility of Hooked Rims: You aren’t limited to specific tubeless tires; you can run standard clinchers with tubes if you’re in a pinch.
The Drawbacks: Balanced Criticisms
- Premium Pricing: This is an investment. It is one of the most expensive wheels in the DT Swiss catalog.
- Weight: It is heavier than a 50mm or 62mm wheel. If your local rides are constantly uphill, this isn’t your “everyday” wheel.
- Specific Use Case: It is optimized for speeds above 35km/h. If you typically ride slower than this, the aerodynamic benefits are less pronounced compared to the weight penalty.
Who Should Buy This Wheel?
- The Time Trialist: If you live for the “Race of Truth,” this is the ultimate non-disc rear wheel.
- The Triathlete: For Ironman and 70.3 racing, the ARC 1100 85 is the industry standard for those who want maximum aero without the handling quirks of a full rear disc.
- The Crit Racer: In a fast, flat criterium, the inertia of the 85mm rim helps maintain high speeds during the “lull” periods of the race.
- The “Watt-Weenie”: If you have optimized your kit, your helmet, and your position, this wheel is the final piece of the aerodynamic puzzle.
Who Should Look Elsewhere?
- The Weight Weenie: If you live for the KOMs on steep mountain passes, look at the DT Swiss PRC 1100 Mon Chasseral.
- The Beginner: If you are still getting comfortable with bike handling, an 85mm rim can be intimidating in windy coastal areas.
- The Budget-Conscious: The ARC 1400 version offers the same rim shape but with stainless steel bearings and 240 hubs at a significantly lower price point.
Comparison: DT Swiss ARC 1100 85 vs. The Competition
| Wheelset | Depth (mm) | Weight (Set) | Hub / Bearings | Best Use |
|---|---|---|---|---|
| DT Swiss ARC 1100 85 | 85 | ~1800g | 180 / SINC Ceramic | Pure Aero / TT |
| Zipp 808 Firecrest | 80 | ~1635g | ZR1 / Steel | Versatile Deep Aero |
| ENVE SES 7.8 | 71/78 | ~1650g | ENVE Alloy / Steel | Stability-focused |
| Reserve 77/88 | 77/88 | ~1750g | DT 180 or 240 | Mixed conditions |
| Hunt Limitless 82 | 82 | ~1770g | CeramicSpeed Opt. | Value Aero |
Note: While the Zipp 808 is lighter, it uses a hookless rim, which limits tire pressure and choice. The DT Swiss ARC 1100 85 is often cited in independent testing as having superior “sailing” characteristics at higher yaw angles.
Mechanic’s Corner: Installation & Maintenance
1. Tubeless Setup
DT Swiss provides the best tubeless tape in the industry. It’s pre-installed and fits the rim bed perfectly.
- Pro Tip: Use a 100mm+ valve stem. Even with an 85mm rim, you need enough “chimney” to get a pump head on securely.
- Tire Width: For the best aero-to-rolling resistance balance, I recommend a 25mm Continental GP5000 S TR on the front and a 28mm on the rear.
2. Cassette & Rotor Installation
- The Center Lock interface requires a standard 12-notch tool. Torque to 40Nm.
- The Ratchet EXP freehub can be swapped by hand-simply pull it off (no tools needed) to change from Shimano to SRAM XDR.
3. Maintenance
- Cleaning: Avoid high-pressure washers near the 180 hub. The SINC ceramic bearings are well-sealed, but no bearing survives a direct blast from a pressure washer.
- Spoke Tension: Check after the first 500km. Deep carbon rims place high stress on spoke nipples; a quick “ping test” ensures everything is settled.
Frequently Asked Questions (FAQ)
Is the DT Swiss ARC 1100 DiCut 85 worth the price?
If you are racing at a high level where seconds matter, yes. The combination of Swiss Side aero and DT Swiss hub reliability is unparalleled.
Is an 85mm wheel too deep for everyday riding?
For most, yes. It is a specialized tool. However, if your local terrain is flat and you enjoy fast solo rides, it’s perfectly usable.
Does it handle crosswinds well?
Surprisingly well for its depth. It is more stable than older “V-shaped” deep rims from a decade ago, but you will still feel the “tug” in heavy gusts.
Is it good for climbing?
It’s acceptable for rolling hills, but it’s too heavy for sustained alpine climbing.
Can it be used with inner tubes?
Yes. Despite being “Tubeless Ready,” the hooked rim allows for standard clincher tires and tubes.
Does it support SRAM AXS?
Yes, it is compatible with SRAM XDR drivers (often included in the box).
What is the weight limit?
The system weight limit (bike + rider) is typically 110kg, which is generous for a performance race wheel.
Is Ratchet EXP better than the old Ratchet system?
It is lighter and uses fewer moving parts, which generally leads to better reliability, though it requires specific “EXP” grease for maintenance.
Are ceramic bearings actually faster?
In lab tests, yes. In the real world, the benefit is small (1-2 watts), but in racing, those watts add up over hours.
What tires work best?
The rim is optimized for 25mm and 28mm tires. Anything wider than 30mm will begin to degrade the aerodynamic profile.
Pros & Cons Table
| Pros | Cons |
|---|---|
| Extreme aerodynamic efficiency | High initial investment cost |
| Predictable handling in wind (Aero+) | Heavy for pure climbing |
| World-class DT 180 hub internals | Requires long valve extenders |
| Hooked rim (no tire limitations) | Overkill for casual or slow rides |
| Low-friction SINC ceramic bearings |
Final Verdict: The Speed King
The DT Swiss ARC 1100 DiCut 85 Rear Wheel is not a “jack-of-all-trades.” It is a master of one: Velocity.
It is an uncompromising piece of equipment designed for the rider who prioritizes speed above all else. The engineering partnership with Swiss Side has yielded a rim that doesn’t just fight the wind but uses it to its advantage. When you combine that with the mechanical perfection of the 180 DiCut hub and SINC ceramic bearings, you have a wheel that feels “unrivaled” once you cross the 40km/h threshold.
If you are a triathlete, a TT specialist, or a flat-land speed hunter, this is arguably the best aerodynamic rear wheel on the market today. It represents the gold standard of what modern carbon fiber and fluid dynamics can achieve.
