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SunRace STM503 And brake lever set
SunRace

SunRace STM503 And brake lever set

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Features of SunRace STM503 And

Product description of SunRace STM503 And brake lever set

Description summary

Conquer any terrain with the SUNRACE STM503 Shifter and Brake Lever Set. This integrated system streamlines your cockpit, combining crisp 3x8 speed indexed shifting with powerful, reliable braking. Experience seamless gear changes to maintain momentum on climbs and descents, while the ergonomic levers ensure comfortable, confident control and reduce fatigue. Crafted from durable, high-quality materials, this set is built to withstand the rigors of off-road adventure, giving you the performance you need to elevate every mountain biking experience

Conquer Any Terrain with Confidence: SUNRACE STM503 Shifter and Brake Lever Set

Upgrade your mountain biking experience with the SUNRACE STM503 Shifter and Brake Lever Set, a perfect blend of performance, durability, and ergonomic design. This integrated set delivers crisp shifting and reliable braking power, giving you the control you need to tackle any trail with confidence.

Seamless Shifting, Unstoppable Momentum:

The SUNRACE STM503 Shifter features a precise 3x8 speed configuration, allowing you to find the perfect gear ratio for climbs, descents, and everything in between. Experience smooth, effortless shifting thanks to the indexed shifting mechanism, ensuring you maintain momentum and conquer challenging terrain with ease.

Confident Control at Your Fingertips:

The integrated brake levers are designed for optimal comfort and control. The ergonomic design provides a natural hand position, reducing fatigue and improving your grip, even on long rides. Powerful braking performance ensures you can confidently navigate technical sections and maintain control in all conditions.

Built to Last, Ride After Ride:

Crafted from high-quality materials, the SUNRACE STM503 Shifter and Brake Lever Set is built to withstand the rigors of off-road riding. The durable construction ensures long-lasting performance, making it a reliable choice for avid mountain bikers.

Key Features:

* Integrated shifter and brake lever set for a clean, streamlined cockpit.
* 3x8 speed compatibility offers a wide gear range for diverse terrain.
* Indexed shifting provides crisp, accurate gear changes.
* Ergonomic lever design ensures comfortable and controlled braking.
* Durable construction withstands the demands of MTB riding.

Technical Specifications:

* Speed: 3x8
* Brake Type: V-Brakes/Mechanical Disc Brakes
* Lever Material: Aluminum
* Cable Included: Yes

Experience the SUNRACE difference. Order your STM503 Shifter and Brake Lever Set today and elevate your mountain biking adventures!

IMPORTANT NOTE: Left levers work with front brake and right levers work with back brakes. Left gear shifters work with chain rings and right gear shifters work with cycling cassettes.

Specifications

Manual

Technical specifications of SunRace STM503 And

Features of SunRace STM503 And

Color Black

Color

Black

Recommended Use MTB Cycling

Recommended Use

MTB Cycling

Electronic No

Electronic

No

Features Shifters and brakes

Features

Shifters and brakes

Rings 3s

Rings

3s

Pinions 8s

Pinions

8s

Key differentiators

Designed for use with rim brakes

Durable and lightweight aluminum construction at 150 grams

Ergonomic, anatomic lever shape for enhanced comfort and control

Integrated 3x8 speed shifter and brake lever design

Weather-resistant for reliable performance in various conditions

Technology in SunRace STM503 And brake lever set

Energy rating

Warnings

5 / 5

2 Reviews

What our customers are saying about SunRace STM503 And brake lever set

SunRace STM503 And brake lever set

Excellent product

2025/11/28

martin

Very good product in my opinion, I also think the look is very attractive for the eye.

SunRace STM503 And brake lever set

-

2024/07/30

-

They work perfectly, easy regulation.

Write a review about this product

Answer the question

Write your answer

The question has already been answered, thank you very much for trying to help another customer. We will count on you for future questions.

Include AI Generated questions and answers

2026-07-19

Generated by AI and verified

SunRace STM503 And brake lever set

What materials are used in the Sunrace STM503 set?

Answer of Generated by AI and verified

The Sunrace STM503 Shifter and Brake Lever Set is crafted from durable, high-quality materials to withstand off-road use. The levers themselves are made of aluminum, ensuring a balance of strength and light weight.

* Generated by AI based on customer and product data

2026-07-19

Generated by AI and verified

SunRace STM503 And brake lever set

Does the Sunrace STM503 set have an ergonomic design?

Answer of Generated by AI and verified

Yes, the Sunrace STM503 set features an ergonomic design with an anatomic lever shape. This is intended to provide a natural hand position, reduce fatigue, and improve grip and control during your rides.

* Generated by AI based on customer and product data

2026-07-19

Generated by AI and verified

SunRace STM503 And brake lever set

What is the gear configuration for the integrated shifter?

Answer of Generated by AI and verified

This set includes an integrated shifter with a 3x8 speed configuration, providing a wide range of gears suitable for climbing, descents, and flat terrain.

* Generated by AI based on customer and product data

2026-07-19

Generated by AI and verified

SunRace STM503 And brake lever set

Is the Sunrace STM503 set suitable for off-road riding?

Answer of Generated by AI and verified

Yes, this set is designed to withstand the rigors of off-road and mountain biking. Its durable construction and integrated design for shifting and braking provide the reliable performance needed for tackling various trails.

* Generated by AI based on customer and product data

2026-07-19

Generated by AI and verified

SunRace STM503 And brake lever set

What type of brakes is the Sunrace STM503 lever set compatible with?

Answer of Generated by AI and verified

The Sunrace STM503 brake levers are designed to be compatible with rim brake systems.

* Generated by AI based on customer and product data

2025-11-18

Mark

SunRace STM503 And brake lever set

What exactly is included in the delivery? Are the two cables/shift cables included? And the cable end caps?

Answer of ignacio

It only includes the shift cables that are already inside the controls, but does not include brake cables or cable housings or sleeves.

* Generated by AI based on customer and product data

2024-05-28

Francisco Javier

SunRace STM503 And brake lever set

Are they compatible with cantilever brakes? Thank you

Answer of Witali

They are compatible with V-Break and mechanical disc brakes.

* Generated by AI based on customer and product data

Ask a technical question about this product

Frequently bought together
Best sellers

Use cases

Upgrading or Repairing Bikes 100% Fit

This set is ideal for replacing or upgrading the controls on entry-level commuter or city bikes. The integrated shifter and brake lever design simplifies the cockpit, and its compatibility with standard rim brakes makes it a straightforward fit for many common bicycles.

integrated_shifter,compatible_brake_type,lever_material

Recreational Road or Hybrid Cycling 80% Fit

For riders enjoying leisurely rides on paved roads or gentle paths, this set provides reliable shifting and braking. The ergonomic and anatomic lever shape offers comfortable control for casual, non-competitive cycling.

ergonomic_design,lever_shape,compatible_brake_type

Restoring or Refurbishing Older Bicycles 70% Fit

This lever set is a great value option for bringing an older bike with rim brakes back into service. Its durable aluminum construction and weather resistance ensure it can handle regular use after a restoration project.

compatible_brake_type,lever_material,weather_resistance

Building a Budget-Friendly Custom Bike 70% Fit

When building a simple, cost-effective bike for general use, this integrated lever and shifter set is a practical choice. It combines two essential controls into one unit, simplifying the build process and keeping the handlebar area uncluttered.

integrated_shifter,mounting_type,compatibility_standard

Best for

Best for Urban

This set provides dependable, precise stopping power and integrated 3x8 shifting, ensuring control and security on city streets.

Based on product features

Ideal for Recreational Riders

The ergonomic, anatomic lever shape enhances comfort and control, making casual rides more pleasurable and secure.

Based on product features

Great for Cyclists

Offering reliable performance with durable aluminum construction and integrated shifters, this set represents great value for an essential upgrade.

Based on product features

Benefits

FunctionalDesigned for a Comfortable Hold

Experience a more comfortable ride with levers designed to fit the natural shape of your hands. This design helps reduce hand fatigue, allowing you to focus on the road ahead.

ergonomic_design: yes

lever_shape: anatomic

FunctionalIntegrated Shifting and Braking

This set combines braking and shifting into a single unit for a cleaner, more organized handlebar setup. The integrated design provides convenient access to both controls without needing to change your hand position.

integrated_shifter: yes

mounting_type: integrated

FunctionalBuilt to Withstand the Elements

Ride with confidence in various conditions, as these levers are designed for weather resistance. The durable aluminum construction ensures dependable performance, ride after ride.

weather_resistance: yes

lever_material: aluminum

FunctionalVersatile for Rim Brake Setups

Engineered for compatibility with standard rim brake systems, this lever set offers a versatile solution for many bicycle builds and upgrades. It adheres to ISO standards, ensuring a straightforward integration with your existing components.

compatible_brake_type: rim

compatibility_standard: ISO

Ideal buyer profiles

The Recreational Rider

This cyclist enjoys casual rides on bike paths, through parks, or on gentle trails. They value reliability and comfort over cutting-edge performance and are likely using a hybrid or older mountain bike.

The Sunrace STM503 set is an excellent match, offering an integrated 3x8 speed shifter and brake lever system that's perfect for the gearing on many recreational bikes. The anatomic lever shape and ergonomic design provide comfort on leisurely rides, while the durable aluminum construction ensures long-lasting performance.

The Upgrader

This individual is looking to repair or upgrade an older bicycle without investing in a complete new drivetrain. They are practical, seeking a functional and cost-effective solution to get their bike back in top working order.

This set provides a straightforward replacement for aging or broken 3x8 speed systems. Its compatibility with rim brakes and ISO standards makes it a versatile choice for many older frames. The integrated design simplifies the cockpit and the inclusion of cables offers great value.

The Urban

This rider uses their bicycle for daily transportation, navigating city streets and bike lanes. They need dependable components that can handle daily use and varying weather conditions without requiring constant maintenance.

With its weather-resistant design and reliable 3x8 speed shifting, the Sunrace STM503 set is well-suited for the demands of daily commuting. The integrated shifters and brake levers create a clean, simple cockpit, and the ergonomic design helps reduce hand fatigue on the ride to and from work.

Competitive features

When evaluating the Sunrace STM503 Shifter and Brake Lever Set against other components, the most significant distinction is its integrated design. While alternatives on the market often consist of separate shifter or brake lever units, the STM503 combines both functions into a single, streamlined system for your cockpit. This fundamental difference is key for riders looking to simplify their handlebar setup.

Where it excels

The primary advantage of the Sunrace STM503 is its integrated nature, which combines 3x8 speed indexed shifting and braking into one cohesive unit. This can lead to a cleaner, more organized handlebar setup compared to using separate components. | Designed as a complete set, it ensures inherent compatibility between the shifting and braking mechanisms, removing the guesswork involved in matching separate parts. | The product is described as having ergonomic levers, which are intended to provide comfortable control and reduce fatigue during rides, a feature not specified for the separate shifter or lever alternatives.

Consider alternatives if...

If your bike's drivetrain is not a 3x8 speed system, this integrated set would not be compatible. In that case, you would need to consider individual shifters, like the Sram SX-e Eagle or Microshift Advent models, that match your specific gearing. | Riders who prefer to customize their cockpit with specific, high-performance shifters and brake levers from different brands may find this all-in-one solution limiting. Separate components allow for more granular upgrades and personalization. | If only one part of your system is broken or needs an upgrade (e.g., just the rear shifter or one brake lever), purchasing this complete set would be unnecessary. A single component like the Brn brake lever or a standalone shifter would be a more direct replacement.

Verdict

The Sunrace STM503 Shifter and Brake Lever Set is a practical and efficient solution for mountain bikers using a 3x8 speed drivetrain. Its strength lies in its integrated design, which simplifies the cockpit and ensures seamless operation between shifting and braking. While it may not offer the modular customization of separate components, it provides a reliable, all-in-one upgrade for tackling varied terrain with confidence. It's a solid choice for riders seeking a straightforward, functional, and cohesive control system.

Specs comparison

Favorite On Favorite Off
Favorite On Favorite Off
Favorite On Favorite Off
Weight150 grams78 grams150 grams150 grams
Lever Materialaluminumaluminumaluminumaluminum
Integrated Shiftertruetruetruetrue
Adjustable Reachfalsefalsefalsefalse
Mounting TypeintegratedintegratedDirect Mountclamp
Ergonomic Designtruetruetruetrue
Lever Length90.0 mm80.0 mm90.0 mm90.0 mm
Compatible Brake Typerimmechanical_disc, rimmechanical_disc, rimmechanical_disc, hydraulic_disc
Adjustable Leverfalsefalsefalsefalse
Compatibility StandardISOISO-ISO
Lever Shapeanatomicstraightstraightanatomic

Specs vs competitors

Favorite On Favorite Off
Favorite On Favorite Off
Weight150 grams150 grams100 grams
Lever Materialaluminumaluminumcarbon
Adjustable Reachfalsefalsefalse
Mounting Typeintegratedclampclamp
Ergonomic Designtruetruetrue
Lever Length90.0 mm90.0 mm70.0 mm
Compatible Brake Typerimmechanical_disc, hydraulic_discHydraulic Disc
Adjustable Leverfalsefalsefalse
Compatibility StandardISOISOISO
Lever Shapeanatomicanatomicanatomic
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