Over 2,000,000 Million Customers Served!!!

Need Help? Click the Live Chat to Talk to a Gearhead 💪

Enjoy Free Shipping on Orders Over $75 – Available Within the Lower 48 States!

SKU: SRVK0517

Diaz Suspension Design Runt Cartridge for Fox 36 & Z1 Bomber 170mm - Dual Chamber Air Spring with Near-Linear Compression, Infinite Adjustability, Built-in Progression, Lightweight Coil-Like Feel, Compatible with 2018+ Fox 36 and Z1 Bomber Forks

Regular price $225.00
$225.00 Sale price $225.00 Regular price
Sale Sold out
Unit price
/per 
  • Free Shipping Over $75
  • 30 Day Returns
  • Satisfaction Guaranteed!

$10 Gift Card

at 250 points

$25 Gift Card

at 500 points

$75 Gift Card

at 1,000 points

This is a pre order item. We will ship it when it comes in stock.

$10 Gift Card

at 250 points

$25 Gift Card

at 500 points

$75 Gift Card

at 1,000 points

Description
Specifications

Upgrade your mountain bike's suspension with the Diaz Suspension Design Runt Cartridge Fox - 36 and Z1 Bomber 170mm, the original dual chamber air spring cartridge engineered for superior performance and adjustability. Crafted with high-quality materials, this innovative cartridge features a patent-pending design that delivers a near-linear compression curve, mimicking the feel of a coil spring while maintaining infinite tunability for a customized riding experience.

Designed for versatility and ease of installation, the Runt Cartridge offers a seamless drop-in replacement for Fox 36 (2018+ NA2 air spring) and Marzocchi Z1 Bomber 170mm forks. Its coil-like suppleness provides exceptional mid-stroke support and built-in tunable progression or bottom-out resistance through a secondary air chamber and valve, ensuring optimal performance across diverse terrain and riding styles.

Constructed to be lightweight-1/2 lb lighter than coil conversions and only 20 grams heavier than tokens or spacers-this cartridge preserves your fork's air spring compatibility while enhancing durability and ride quality. Whether tackling aggressive enduro, technical trail riding, or long-distance climbs, the Diaz Runt Cartridge offers unmatched adjustability and performance.

Key Features & Benefits:

- Materials & Engineering: Precision-machined from high-grade components for durability, lightweight construction, and reliable performance.

- Performance & Technology: Dual chamber air spring with patent-pending design for a near-linear compression, coil-like feel, and customizable bottom-out support.

- Adjustability: Infinite tuning options via secondary air chamber and valve, enabling riders to dial in their optimal suspension setup.

- Compatibility: Fits 2018+ Fox 36 (NA2 air spring) and Marzocchi Z1 Bomber forks-170mm travel, easy drop-in installation.

- Style & Use Case: Designed for aggressive trail riders, enduro racers, and mountain biking enthusiasts seeking high-performance, adjustable suspension enhancements.

Note: Not compatible with NA1 air springs, Z1 Coil forks, or Fox 36 E-Bike forks. This product is sold exclusively through authorized channels; third-party listings are prohibited.

Enhance your fork's performance with the Diaz Suspension Design Runt Cartridge - the perfect upgrade for riders demanding coil-like support with the versatility of air. Experience smooth, controlled rides on demanding terrain with increased control and reliability.

  • Innovative dual chamber air spring cartridge featuring patent-pending design for a near-linear compression curve and coil-like suppleness, enhancing rider comfort and control.
  • Constructed with durable, lightweight materials, the Diaz Suspension Design Runt Cartridge is only 1/2 lb lighter than coil conversions, providing increased performance without added weight, and maintains compatibility with Fox 36 (2018+) NA2 air springs and Marzocchi Z1 Bomber forks.
  • Advanced engineering includes built-in tunable progression and bottom-out resistance via a secondary air chamber and valve, allowing precise adjustment for mid-stroke support and bottom-out protection tailored to your riding style.
  • Designed specifically for 170mm travel Fox 36 and Z1 Bomber forks, the cartridge offers easy drop-in installation, enabling quick upgrades without fork disassembly, and maintains factory air spring compatibility for seamless integration.
  • Enhance your mountain biking experience with this high-performance cartridge that combines coil-like softness, infinite adjustability, and durable construction, making it an essential upgrade for aggressive trail riding, enduro, and all-mountain disciplines.
Model NameRunt RU36-07
CompatibilityFox 36 and Marzocchi Z1 Bomber 170mm
Shipping
Returns
About Us
Contact Us

We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping on orders over $75!

The nitty gritty, for specific delivery timelines please pay attention to the delivery timelines on the product pages and the time frame estimated in the carts. If you need a part by a specific day, please contact us by chat, phone, or

Chat

Talk with a representative

Start Chat

Email

info@365cycles.com

Send Email

Phone

603-968-5797

Call Now

Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

We provide the you the ability to utilize multiple shipping & billing addresses, based upon what fits your current needs. However you are responsible to maintain and update any new address changes, as 365 Cycles will not be held liable for orders being shipped to an incorrect address.

  • Our Mistake: If we messed it up you can rest assured we are going to make it right. Contact us by email, phone, or chat and we will make your head spin with how quick we fix it
  • Warranty: We are an authorized retailer for everything we sell, so rest assured your product is covered under the manufacturer's warranty. Contact Us if you are having an issue and we will make sure you are taken care of
  • Just don't want it anymore: We have a 30-day return policy for orders within the US. We offer refunds on returned items that are brand new and in their undamaged, original packaging. Customers are responsible for the cost of return shipping. Damaged, installed, and used items as well as those without original packaging are not eligible for returns. If it's returned in this condition it may be denied and sent back to you

If you need to return your order please email us at info@365cycles.com, call us at 603-968-5797, or use the live chat on our site.

Chat

Talk with a representative

Start Chat

Email

info@365cycles.com

Send Email

Phone

603-968-5797

Call Now

*Please allow up to 3 business days for us to process your return*

365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

Living an active lifestyle is just that, a lifestyle that never goes away and our goal is to always exceed your expectations so we can take this lifelong journey together. We strive to have the parts you need, at competitive prices with unmatched shipping speeds!

If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms.

Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at ben@365cycles.com with "CUSTOMER LOYALTY" in the title and I will personally handle your order.

Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

“If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

Ben Berman Founder & CEO of 365 Cycles


Company Core Values: 

These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at info@365cycles.com if someone you worked with has gone above and beyond in one of these areas. 

Customer Loyalty

Put yourself in their shoes and support those who support us.

You Control the Outcome

If it is to be, it’s up to me" You are personally responsible for controlling the outcome.

Seek Understanding

Understanding the answer is more important than the answer.

Progress Not Perfection

Pick a direction, analyze the results, and be willing to change course.

Will to Win

Customers, 365 Team, Partners, all need the will to win. Bring the Will to Win to every conversion.

Keep Moving

Move the body, move the mind, and remove any hurdles to achieving an active lifestyle.

Do the Right Thing:

Doing the right thing is more important than doing the thing right.

Stronger together:

If you want to go fast, go alone, if you want to go far, go together. Get your team involved and become stronger together.

Chat

Talk with a representative

Start Chat

Email

info@365cycles.com

Send Email

Phone

603-968-5797

Call Now

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)