About The Product
- Sunrace replacement twist shifters
- Shimano/Sram MRX compatible pull ratio
- Available in Friction, 3,5,6,7, and 8 speed options
Upgrade your bike's shifting performance with the Sunrace M2 Twist Shifter TSM21 Left Friction - the perfect choice for cyclists seeking reliable, precise gear control. Engineered with durability and versatility in mind, this left-side friction shifter provides smooth operation across a range of gear setups, making it ideal for vintage builds, custom projects, or simple trekking setups.
Materials & Construction:
Crafted from high-quality, lightweight materials, the Sunrace M2 TSM21 shifter delivers excellent durability and resistance to wear. Its ergonomic design ensures comfortable handling during long rides, with a robust build that stands up to the rigors of everyday cycling.
Performance & Engineering:
Designed with a 2:1 pull ratio, the TSM21 offers predictable and responsive gear changes, compatible with both Shimano and SRAM MRX systems. Its friction-based mechanism allows for customizable shifting tension, providing riders with smooth, reliable gear adjustments in any riding condition.
Components & Technology:
This left friction shifter supports multi-speed configurations from 3 to 8 speeds, available in various options to suit your specific setup. The twist-shift interface provides intuitive, easy-to-use gear changes, allowing you to maintain focus on your ride without distraction.
Style & Use Case:
Ideal for retro, commuter, or touring bikes, the Sunrace M2 TSM21 adds a classic touch combined with modern reliability. Its versatile compatibility makes it perfect for upgrading older bikes or customizing new builds that prioritize simplicity and ease of use.
Innovative & Differentiating Features:
- Compatible with Shimano and SRAM MRX systems for versatile installation
- Available in multiple speed options (3, 5, 6, 7, and 8 speeds) to match your drivetrain
- Friction design provides a traditional, tactile shifting experience with no indexing required
Item Specifications:
- Ratio: 2:1 pull ratio for precise gear engagement
- Type: TSM21 friction shifter
Upgrade your cycling experience with the Sunrace M2 Twist Shifter TSM21 Left Friction - a reliable, adaptable, and stylish component for riding with confidence. Enhance your bike's performance today!
- Upgrade your bike's shifting performance with the Sunrace M2 Twist Shifter TSM21 Left Friction, designed for precise and reliable gear control.
- Constructed with durable materials ensuring long-lasting performance, this twist shifter provides smooth, responsive operation for a seamless riding experience.
- Compatible with Shimano and Sram MRX systems, the Sunrace TSM21 features a 2:1 pull ratio, making it a versatile replacement for a wide range of bike setups.
- Available in friction as well as 3, 5, 6, 7, and 8-speed configurations, this shifter offers flexible gearing options to suit different riding styles and terrains.
- Innovative engineering with ergonomic twist design allows for easy gear changes, making it ideal for urban commuters, mountain bikers, and recreational cyclists alike.
| Specification | Value |
|---|---|
| Manufacturer | SUNRACE |
| Manufacturer Part No. | TSM21.L00S.GS0.HP |
| Universal Product Code | 4710944250190 |
| Invoice Description | SHIFTER SUNRACE HB TSM21 TWIST FRICT LH |
| Shipping Weight | 0.26 lbs. |
| Package Dimensions | 7.55 x 6.3 x 2.15 |
| HTS Number | 8714.99.5000 |
| Country of Origin | TAIWAN |
| Type | TSM21 |
| Left/Right/Pair | Left |
| Speeds | Friction |
| Ratio | 2 to 1 |
| Color | Blk/Gry |
- 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
