About The Product
- Kool-Stop organic disc brake pads designed to be rotor friendly and even performing through the life of the pad
Upgrade your mountain biking performance with the Koolstop D640 Clarks M4 / Shimano Saint M810, M820, M640, M8020, TRP G-Spec, Quadiem, and Slate Evo Compatible Organic Disc Brake Pads. Engineered for durability, rotor friendliness, and consistent braking power, these brake shoes are an essential component for serious cyclists seeking reliable stopping performance on rugged terrains.
Premium Materials & Construction
Crafted from high-quality organic compounds, Koolstop brake pads offer excellent modulation and quiet operation. The steel backplate ensures durability and effective heat dissipation, maintaining performance under demanding riding conditions. Designed without cooling fins, these pads focus on providing stable, rotor-friendly braking with minimal wear.
Advanced Performance & Engineering
Specifically engineered to work seamlessly with Shimano Saint, Clarks M4, TRP G-Spec E-MTB, Quadiem, and Slate Evo brakes, the D640 pads deliver consistent braking power across diverse trail and enduro scenarios. Their rotor-friendly organic material ensures minimal rotor squeal and reduced wear, extending the lifespan of both the pads and your rotor.
Innovative Components & Compatibility
Built for modern mountain bikes, these pads are compatible with Shimano D-Type/H-Type calipers and are optimized for use with Shimano Zee, Saint M810/M820/M640/M8020, as well as TRP G-Spec and Quadiem brake systems. The included steel backing plate and spring help ensure proper alignment and reliable performance during aggressive riding.
Stylish & Practical Use Case
Ideal for aggressive mountain bikers, enduro racers, and E-MTB riders, the Koolstop D640 brake pads provide excellent modulation, reliable stopping power, and rotor compatibility. Whether tackling technical descents or high-speed descents, these pads are designed to enhance your braking confidence and control.
Key Features:
- Compatibility with Shimano Saint, Clarks M4, TRP G-Spec, Quadiem, Slate Evo, and more
- Organic pad material for rotor-friendly, quiet braking
- Steel backplate for durability and heat management
- Standard compound optimized for all-mountain and enduro riding
- Includes pad spring for secure installation and performance stability
Elevate your mountain biking braking system with Koolstop D640 Organic Disc Brake Pads - the perfect blend of materials, engineering, and compatibility for dependable riding on tough trails. Ensure your bike's braking performance remains reliable, controlled, and rotor-friendly with these high-quality, SEO-optimized brake shoes.
- High-performance Koolstop D640 Clarks M4 / Shimano Saint M810, M820, M640, M8020, TRP G-Spec, and E-MTB brake pads for reliable stopping power on demanding trails.
- Constructed with organic materials that are rotor-friendly, ensuring consistent performance and minimal rotor wear over time for enhanced durability.
- Designed with steel backplates and spring-loaded construction for secure fitment, quick installation, and stable, squeal-free braking under various riding conditions.
- Optimized for E-MTB, Quadiem, and other high-performance mountain bike setups, these brake shoes deliver powerful modulation and dependable braking performance in aggressive riding scenarios.
- Engineered for style and versatility, they are compatible with Shimano D-Type/H-Type and Shimano Saint brake calipers, making them a perfect upgrade for mountain bikers seeking reliable, long-lasting brake pads.
| Specification | Value |
|---|---|
| Manufacturer | KOOLSTOP |
| Manufacturer Part No. | KS-D640 |
| Universal Product Code | 760251076345 |
| Invoice Description | BRAKE SHOES K/S DISC SHI ZEE/SAINT ORG/STL w/SPRING |
| Shipping Weight | 0.06 lbs. |
| Package Dimensions | 5.15 x 3.25 x 0.45 |
| Country of Origin | UNITED STATES |
| Pad Style ID | 31 |
| Compatibility | Clarks M4 / Shimano Saint M810, M820, M640, M8020 / TRP G-Spec E-MTB, Quadiem, Quadiem G-Spec, Slate Evo, Slate T4 |
| Pad Material | Organic |
| Compound | Standard |
| Brand | Kool-Stop |
| Backplate | Steel |
- 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
