About The Product
- Combination brake lever and Push/Pull style trigger shifter
- Aluminum brake lever with composite shifter levers and steel/chromoly hardware
- Integrated gear display for ease of use
- Slick galvanized cable
- Compatible with V brake and mechanical disc
Upgrade your mountain biking experience with the SunRace M503 ST Trigger Brake/Shift Lever Set - the perfect combination of durability, precision, and performance for 3x8-speed gear systems. Designed specifically for mountain bikers seeking reliable shifting and braking control, this high-quality set features innovative engineering and premium materials to enhance your ride on rugged trails and challenging terrains.
Materials & Construction
Constructed from lightweight yet robust alloy components, the SunRace M503 ST levers ensure long-lasting durability and corrosion resistance under demanding off-road conditions. The alloy brake lever offers superior responsiveness, while the large alloy shift levers provide easy, confident gear changes even with gloves.
Performance & Engineering
Engineered for smooth, accurate shifting, these trigger levers incorporate a slick-galvanized shift cable for reduced friction and enhanced cable longevity. The push-pull design allows for intuitive operation, enabling quick gear shifts with minimal effort. The adjustable reach feature ensures a customized fit for different hand sizes, delivering maximum control on the trail.
Components & Technology
Designed to be compatible with Shimano mountain bike shifters and V-brakes, the SunRace M503 ST lever set is tailored for reliable performance in mountain biking scenarios. The gear display helps you keep track of your current gear, adding confidence during climbs and descents. Note: This set does not include brake cables or housing, giving you flexibility to choose your preferred cables.
Style & Use Case
Featuring a sleek black finish, the SunRace M503 ST trigger shifters complement a wide range of mountain bike aesthetics. Ideal for trail riders, cross-country racers, and mountain bikers seeking a dependable, high-performing gear shifting solution, these trigger levers are designed for aggressive riding and technical terrain navigation.
Innovative & Differentiating Features
- Gear display for quick gear recognition
- Push-pull lever design for effortless shifting
- Large alloy shift levers for improved ergonomics
- Slick-galvanized shift cable for enhanced durability
- Adjustable reach for tailored fit and comfort
- Compatible with Shimano mountain bike shifters and V-brakes
Item Specifications:
- Drivetrain Compatibility: 8-speed, Shimano Mountain
- Brake Lever Actuation: Long Pull
- Color: Black
- End Type: Shimano/SRAM compatible
- Rear & Front Derailleur Compatibility: Shimano Mountain
- Weight: 433g
- Includes: Shifter set (cables not included)
Upgrade your mountain bike with the SunRace M503 ST Trigger Brake/Shift Levers - engineered for precision, built for durability, and designed to enhance your riding performance. Perfect for off-road adventures that demand reliable gear control and braking power.
- Enhanced shifting performance with a durable, slick-galvanized shift cable for smooth, reliable gear changes in all conditions.
- Constructed from high-quality alloy, the SunRace M503 ST levers provide lightweight strength and superior durability, reducing rider fatigue on long rides.
- Designed for 3x8-speed mountain biking, these trigger levers feature an intuitive push-pull action and adjustable reach for a customized fit.
- Premium compatibility with Shimano Mountain drivetrain components ensures seamless integration and optimal shifting precision on rugged trails.
- Sleek black finish and ergonomic large alloy shift levers offer a stylish, ergonomic design that enhances overall bike aesthetics and control.
| Specification | Value |
|---|---|
| Manufacturer | SUNRACE |
| Manufacturer Part No. | STM503.8300.0S0.BX |
| Universal Product Code | 4710944267037 |
| Invoice Description | SHIFTER SUNRACE HB STM503 TRIGGER/BRAKE 3x8s PR V BK |
| Shipping Weight | 1.34 lbs. |
| Package Dimensions | 11.15 x 8.25 x 3.25 |
| HTS Number | 8714.99.5000 |
| Country of Origin | TAIWAN |
| Type | STM503 |
| Left/Right/Pair | Pair |
| Speeds | 3x8sp |
| Brake Compatibility | V Brake |
| Color | Blk |
| Weight | 433g |
- 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
-
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
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
