About The Product
- Lightweight full carbon rim brings low inertia for instant acceleration and improved control
- 21mm internal width maximises tire volume for improved confidence, efficiency and cornering grip
- 42mm rim profile and flat spokes are wind tunnel proven for low wind resistance and excellent lateral stability at high speed
- Mavic UST tubeless ready improves comfort, efficiency and tire installation
- Rear wheels feature Mavic`s new Instant Drive 360 freewheel
- High quality hubs with dual seal, pre-load adjusted bearings
Upgrade Your Cycling Performance with the Mavic Cosmic S 42 Disc 700C Rear Wheel
Designed for serious cyclists and competitive racers, the Mavic Cosmic S 42 Disc 700C Rear Wheel combines cutting-edge materials, innovative engineering, and aerodynamic technology to deliver unbeatable speed, control, and efficiency on the road. Whether you're tackling long-distance routes or high-speed races, these wheels are engineered to enhance your cycling experience.
Materials & Construction
Crafted with a lightweight full carbon rim, the Cosmic S 42 Disc reduces inertia for rapid acceleration and superior handling. The 21mm internal width maximizes tire volume, providing increased confidence, improved cornering grip, and better ride comfort. The black anodized rim and hub accents emphasize a sleek, professional style suitable for both performance and aesthetic appeal.
Performance & Engineering
Featuring a 42mm rim profile, these wheels are wind tunnel tested to minimize aerodynamic drag, ensuring low wind resistance at high speeds. The flat spoke design enhances lateral stability and aerodynamics, making them ideal for fast-paced riding in varied conditions. The tubeless-ready (UST) technology enhances ride comfort, reduces Flats, and allows for easier tire installation and maintenance, all while improving rolling efficiency.
Components & Technology
Equipped with Mavic's renowned Custom hubs, the Cosmic S 42 Disc incorporates the innovative Instant Drive 360 freewheel system, providing near-instant engagement for powerful acceleration. The hubs feature dual-seal, pre-load adjusted bearings for long-lasting durability and smooth rotation. The wheels are compatible with 8-11 speed mountain or road drivetrains, accommodating a wide range of setup preferences.
Style & Use Case
Perfectly suited for road racers, endurance cyclists, and fast weekend warriors, these wheels excel in performance-oriented scenarios. Their aerodynamic design and stability at high speeds make them especially well-suited for race days, group rides, and spirited solo rides. The sleek black finish complements a variety of bike styles, from aerodynamic road bikes to versatile endurance setups.
Key Features Summary
Lightweight full carbon rims with 21mm internal width for increased tire volume and cornering grip
42mm aerodynamic rim profile with wind tunnel proven design for low drag and excellent lateral stability
Tubeless-ready (UST) compatible for enhanced comfort and efficiency
Mavic Instant Drive 360 freewheel for quick, reliable engagement
High-quality hubs with dual seals and pre-load adjusted bearings for durability
Compatible with 700C tires, Thru-12mm axles, and 8-11s drivetrain configurations
Elevate your cycling with the Mavic Cosmic S 42 Disc 700C wheels-engineered for speed, built for control, and designed to optimize every ride. Dominate the road with these innovative, high-performance wheels from a trusted leader in cycling technology.
- Lightweight full carbon rim construction reduces rotational mass, enabling quick acceleration and enhanced handling on the road or race course.
- 21mm internal width maximizes tire volume for improved grip, cornering stability, and ride comfort across various terrain conditions.
- 22mm deep rim profile with aerodynamic design and wind-tunnel optimization provides exceptional low wind resistance and high-speed stability for competitive cycling and training rides.
- Tubeless-ready Mavic UST system enhances puncture resistance, ride efficiency, and easier tire installation, reducing rolling resistance and improving overall performance.
- Premium quality hubs featuring Mavic's new Instant Drive 360 freewheel with pre-load adjusted bearings deliver quick engagement, smooth rolling, and long-lasting durability for versatile riding or racing applications.
| Specification | Value |
|---|---|
| Manufacturer | MAVIC |
| Manufacturer Part No. | R00078803 |
| Universal Product Code | 3701380914365 |
| Invoice Description | WHL RR MAV 700 622x21 COSMIC S 42 DISC 24 11sRD CL 12x142 TBLS CARBON |
| Shipping Weight | 6.00 lbs. |
| Package Dimensions | 26 x 7 x 26 |
| Country of Origin | ROMANIA |
| Size | 700C |
| Ft / Rr / St | RR |
| Width ID (mm) | 21 |
| Axle | Thru 12mm |
| Rim Color | Blk |
| Rim Model | Cosmic S 42 Disc |
| Hub Model | Mavic Classic |
| O.L.D. | 142 |
| Hub Color | Blk |
| Gears | 8-11s RD |
| Brake Type | CL |
| Spoke Type | Mavic Aero |
| Spoke Count | 24H |
| Wall | Dbl |
| Valve | PV |
| Type | Tubeless Compatible |
| ISO | 622 |
| Search Color | Carbon |
| Weight | 885g |
- Supplier:
- JBI
Bike Junkies offers no‑hassle returns and exchanges within 60 days of delivery. We want every customer to feel confident when shopping with us, and our return process is designed to be simple, fair, and fast.
Return Eligibility
To qualify for a return or exchange, the following conditions must be met:
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The item must be in new, unused, and uninstalled condition.
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All original packaging, tags, hardware, and accessories must be included and intact.
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Items showing wear, installation marks, damage, or improper use cannot be accepted.
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An order number is required.
Once your return is received at our warehouse, a refund will be issued within 5 days after inspection.
Refunds
Refunds are issued to the original form of payment once the returned item has been received and approved. If we are unable to refund to the original payment method, the refund will be issued as store credit.
Depending on your bank or credit card provider, it may take an additional 2–3 business days for the refund to appear in your account.
Exchanges
To make an exchange, simply complete the return process and then place a new order for the item you want instead. This ensures the replacement item is reserved and ships quickly.
How to Start a Return
To request a Return Authorization (RA#), contact us at support@bikejunkies.com. Please include your order number and the item you wish to return.
Once approved:
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You will receive a Return Authorization email with instructions.
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Print the prepaid label provided by us. ($9.99 will be deducted from your refund)
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Ship the item back within 7 days of the RA being issued as RA #'s are only valid for 7 days.
Please do not tape anything to the original product packaging. Place the item inside a proper shipping box. Using the manufacturer’s box as the shipping container will result in damage and the return may be rejected.
Be sure to keep your return tracking number. Powersport Junkies is not responsible for lost return shipments. You will receive a confirmation email once your return has been processed and refunded.
Defective, Incorrect, or Damaged Items
If you receive a defective, damaged, or incorrectly shipped item, contact us immediately. We will cover the return shipping cost and ensure the issue is resolved quickly.
Non‑Returnable Items
Certain items cannot be returned, including:
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Electronics with opened packaging or broken manufacturer seals
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Any part that has been installed or shows installation attempts
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Tools or chemicals that have been opened or unsealed
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Open‑box items with destroyed or missing packaging
Our Info
-
Storefront name: Bike Junkies
-
Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
-
Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
This Shipping Policy explains how orders are processed, handled, and delivered by Bike Junkies, including delivery timelines, shipping coverage, and special conditions for military addresses. It is designed to give customers a clear understanding of what to expect when placing an order.
Bike Junkies is proud to be an authorized dealer of the brands we currently offer. When you purchase from us, you are guaranteed to receive genuine, brand-new products backed by the full manufacturer warranty. We work directly with the manufacturers to ensure you receive the highest quality service and support.
Order Processing and Handling
Orders are processed quickly to ensure fast delivery. Our standard handling time is 0–1 business days. Order cutoff time is 12 PM PST Monday-Friday and orders placed after that will be shipped shipped next business day.
Transit Times
Once shipped, orders typically arrive within 2–3 business days. Transit times may vary slightly depending on the destination, weather conditions, or carrier-related delays. Delivery estimates apply only after the order has left our facility.
Delivery Schedule
Standard delivery occurs Monday through Friday. Saturday delivery may be available.
Shipping Coverage
Bike Junkies offers free shipping to the lower 48 states of the United States. We do not ship to the following locations:
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Alaska
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Hawaii
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Puerto Rico
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Any international destination outside the United States
Orders placed with shipping addresses in restricted locations will be canceled and refunded.
Military Shipping (APO/FPO)
Bike Junkies ships to APO/FPO military addresses using USPS only.
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We cannot ship hazardous materials or oversized items to military addresses due to carrier and military mail restrictions.
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Transit times to APO/FPO locations may vary significantly depending on military mail processing.
Address Accuracy and Delivery Issues
Customers are responsible for ensuring that all shipping information provided at checkout is accurate and complete. Bike Junkies is not responsible for delays, lost packages, or delivery failures caused by incorrect or incomplete addresses. If a package is returned due to an address error, additional shipping charges may apply to resend the order.
Lost, Delayed, or Damaged Shipments
If a shipment is delayed, lost, or arrives damaged, customers should contact us promptly so we can assist with initiating a claim or resolving the issue with the carrier. While we support the process, final decisions regarding claims are made by the carrier.
Tracking Information
A tracking number is provided via email once the shipping label has been created. Tracking updates may take up to 24 hours to appear after the label is generated.
Shipping Restrictions
Certain items may be subject to shipping restrictions due to size, weight, or hazardous material regulations. If an order cannot be shipped due to such restrictions, we will notify the customer to arrange an alternative solution.
Our Info
-
Storefront name: Bike Junkies
-
Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
-
Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
For warranty issues please contact us at support@bikejunkies.com. Each Brand is different and we can provide instruction to complete warranty issues.
Bike Junkies is proud to be an authorized dealer of the brands we currently offer. When you purchase from us, you are guaranteed to receive genuine, brand-new products backed by the full manufacturer warranty. We work directly with the manufacturers to ensure you receive the highest quality service and support.
Our Info
-
Storefront name: Bike Junkies
-
Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
-
Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
