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!

Load image into Gallery viewer, Promax-Threadless-28.6-28.6-STEM1522-Bicycle-Stems
Load image into Gallery viewer, Promax MA-579 25.4mm, Length 110m, Tool Free Adjustable Threadless Stem Black

SKU: STEM1522

Promax MA-579 25.4mm Aluminum Tool-Free Adjustable Threadless Stem - 110mm Black, Multi-Angle Range 90-160 for Enhanced Comfort & Control, Compatible with Mountain and Road Bikes

Regular price $56.81
$55.95 Sale price $56.81 Regular price
Sale Sold out
Unit price
/per 
  • Free Shipping Over $75
  • 30 Day Returns
  • Satisfaction Guaranteed!
Get 5% Off When You Buy 2!

$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 bike's cockpit with the Promax MA-579 25.4mm Tool-Free Adjustable Threadless Stem, designed for riders who prioritize comfort, versatility, and sleek style. Crafted from high-quality aluminum, this durable and lightweight stem offers exceptional performance for both casual commuters and competitive cyclists.

Materials & Construction:

Made from premium 6061 aluminum, the Promax MA-579 ensures durability and corrosion resistance, making it suitable for all riding conditions. Its matte black finish provides a sleek, modern aesthetic that complements any bike setup.

Performance & Engineering:

The tool-free design allows for effortless adjustments, enabling riders to rotate or modify handlebar height quickly without the need for external tools. The adjustable stem features a versatile angle range from 90 to 160 , offering customizable hand positioning for optimal comfort and control during long rides or spirited descents.

Components & Technology:

Designed with a 25.4mm bar clamp diameter and a 28.6mm S.H.I.S. clamp, the MA-579 provides a secure, stable connection for your handlebars. Its 110mm length strikes the perfect balance between responsiveness and stability, making it suitable for city commuting, mountain biking, or recreational riding. The integrated quick-adjust mechanism ensures a tool-free setup, saving time and effort.

Style & Use Case:

Sleek black finish and streamlined design make this adjustable stem an attractive upgrade for any bike. Whether you're customizing your mountain bike, hybrid, or road bike, the MA-579 offers the flexibility to optimize your riding position, improve handling, and enhance overall bike ergonomics. Ideal for riders seeking quick adjustments on the trail or during daily commutes.

Innovative Features:

- Tool-Free Handlebar Adjustment for instant customization

- Adjustable stem angle from 90 to 160 for personalized fit

- Lightweight yet durable aluminum construction

- Compatible with 25.4mm handlebars and 28.6mm S.H.I.S. clamp

- Stylish black finish complements any bike aesthetic

Elevate your cycling experience with the Promax MA-579 Threadless Stem - the perfect blend of engineering, style, and convenience for every rider.

  • Adjustable threadless stem made from lightweight, durable aluminum alloy for excellent strength and corrosion resistance, ensuring long-lasting performance on all riding terrains.
  • Tool-free design allows quick and effortless handlebar height and angle adjustments between 90 to 160 , enhancing rider comfort and control without the need for additional tools or specialized equipment.
  • Optimized for 25.4mm handlebars and compatible with 28.6mm steerer tubes, featuring a versatile 110mm length for improved handling and precise steering on road, mountain, or hybrid bikes.
  • Sleek black finish combines style and functionality, offering a modern, minimalist look that complements any bike frame and is suitable for urban riding, cyclocross, or adventure cycling.
  • Innovative adjustable technology provides quick setup and adjustments, making it ideal for cyclists seeking customizable fit, enhanced ergonomics, and a hassle-free upgrade to their bike's cockpit setup.
Bar Clamp Diameter (mm)25.4
ColorBlack
Defined ColorBlack
Length110
MaterialAluminum
S.H.I.S. Stem Clamp Diameter28.6
Stack Height40
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)