About The Product
- Replacement axle sets for Wheel Master MX-4000 series hubs
Premium Wheel Master MX-4000 Axle Set - 3/8x100x170 DX-21 for Superior Performance and Durability
Upgrade your bicycle's hubs with the high-quality Wheel Master MX-4000 Axle Set, designed specifically for enhanced strength, precision, and reliability. Crafted for optimal performance in both front wheel applications, this replacement axle set ensures your ride remains smooth, secure, and efficient.
Material & Construction:
Constructed from durable, high-grade materials, the Wheel Master MX-4000 Axles feature a robust steel build with precise machining to withstand the rigors of demanding cycling conditions. The corrosion-resistant coating extends longevity, making it ideal for both mountain biking and road cycling.
Performance & Engineering:
Engineered for seamless compatibility with MX-4000 series hubs, these axles provide a perfect fit, reducing play and increasing wheel stability. With a size of 3/8x100x170, they deliver a reliable axle-support system that enhances your bike's handling and responsiveness.
Components & Technology:
The AXLE SET includes the DX-21 supplier part, ensuring compatibility and ease of replacement. Designed for front wheel installation with a spacing of 3/8 inches and a rear Old (OLD) dimension of 100mm, these axles are tailored for optimized load distribution and performance.
Style & Use Case:
Ideal for mountain bikes, cyclocross bikes, and fat bikes requiring sturdy, high-performance axles, the Wheel Master MX-4000 series axle set is perfect for riders seeking reliable components that stand up to rugged terrain and intense cycling adventures.
Innovative Features:
Featuring Precision Machining and corrosion-resistant treatment, these axles deliver superior durability and consistent performance. The quick replacement design minimizes downtime, allowing you to get back on the trail faster.
Optimize your bike's hub system with the Wheel Master MX-4000 Axle Set - a perfect blend of strength, reliability, and engineering excellence for serious cyclists. Order now for improved wheel stability, safety, and performance on every ride!
- High-strength 3/8x100x170 axles engineered specifically for Wheel Master MX-4000 series hubs, ensuring optimal durability and reliable performance during intense riding sessions.
- Constructed from premium materials designed to withstand high loads and harsh riding conditions, these replacement axles provide longevity and consistent performance for both professional and recreational cyclists.
- Designed with advanced engineering standards, the DX-21 axles feature precise dimensions and spin alignment for seamless integration with MX-4000 front hubs, enhancing stability and hub responsiveness.
- Perfect for upgrading or replacing worn or damaged axles, these lightweight yet sturdy components are ideal for mountain biking, trail riding, or aggressive cross-country cycling where durability and precision matter.
- Innovative compatibility with Shimano-style disc brake systems and a B/O 3/8 inch spacing make these axles versatile and compatible with a range of wheelsets, improving your bike's performance and style.
| Specification | Value |
|---|---|
| Manufacturer | WHEEL MASTER |
| Universal Product Code | 888571045251 |
| Invoice Description | HUB AXLE SET FT WM MX4000 3/8x100x170 BO DX-21 37245 37247 37246 |
| Shipping Weight | 0.24 lbs. |
| Package Dimensions | 6.6 x 1.15 x 0.65 |
| HTS Number | 8714.99.8000C1 |
| Country of Origin | CHINA |
| Supplier Part | DX-21 |
| Size | 3/8x100x170 |
| Spacing / Axle | B/O 3/8 |
| Compatibility | MX-4000 |
| Bearing Type | Loose Ball |
| Front / Rear | Front |
| OLD | 100 |
| Length | 170 |
- 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
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Storefront name: Bike Junkies
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Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
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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
