TorqTube - Precision Preset Torque-Limiting Extension

Premium Modular Torque Control

TorqTube brings professional preset torque control to Prestacycle ratchets and compatible 1/4" hex driving tools. Its compact inline design combines ±4% accuracy, all-metal construction, and a patented full-overrun mechanism in a torque limiter built for demanding bicycle service.

Professional ±4% Torque Accuracy

• Factory preset to a single torque value for fast, repeatable tightening.
• ±4% torque accuracy for precision bicycle assembly and service.
• No adjustments or setup required.
• Full mechanical overrun provides unmistakable feedback when preset torque is reached.
• Automatically resets after every use.

Patented Torque-Limiting Technology

• Patented preset torque-limiting mechanical overrun mechanism.
• Full mechanical overrun limits transmitted tightening torque once the preset torque is reached
• Spring design prevents calibration drift.
• Factory calibrated for 10,000+ torque cycles at the preset torque value.
• Over-torque resistant design protects the torque mechanism from damage if excessive force is applied.
• Direct drive for unscrewing without affecting the torque-limiting mechanism.

Premium All-Metal Construction

• Steel internal torque mechanism for professional durability.
• Anodized aluminum outer housing.
• Withstands drops exceeding 10 ft (3 m) without damage or loss of calibration.
• Designed for repeated professional workshop and race-service use.
• Color-coded by torque value for fast identification.

Modular 1/4" Hex System

• Standard 1/4" hex input and output.
• Works with compatible Prestacycle ratchets and standard 1/4" hex driving tools.
• Functions as a compact inline torque-limiting component rather than a separate complete torque wrench.
• Compatible with standard 1/4" hex bits and Prestacycle bit systems.
• Can be used with compatible power drills and power screwdrivers with the appropriate adapter.
• Ratchet, bits, adapters and accessories are sold separately.

Tighten With Precision. Unscrew With Strength.

• Clockwise operation provides preset torque limiting.
• Counterclockwise operation provides direct drive for unscrewing with no torque limiting.
• Safely handles up to 30 Nm of unscrewing torque.
• One TorqTube can move between compatible driving tools as the job requires.

Built for Professional Bicycle Service

• Ideal for repeated bike builds, pre-race checks and precision workshop service.
• Excellent for carbon fiber and lightweight components where correct fastener torque is critical.
• Designed for road, gravel, MTB, cyclocross, BMX, commuter, touring and e-bikes.
• Suitable for professional mechanics, race support, mobile mechanics and demanding home workshops.

TorqTube Torque System

• Available in 2, 3, 4 and 5 Nm.
• 6 Nm coming October.
• 7, 8 and 10 Nm planned for future release.
• Choose individual TorqTubes for the torque values you use most or combine multiple values into a modular professional torque system.

Product Information

Product Type: Professional Preset Torque Limiter
Product Category: Torque Tools
Primary Application: Bicycle Assembly and Service
Bike Compatibility: Road, Gravel, MTB, BMX, Cyclocross, Commuter, Touring, E-Bike
Assembly Required: No
Family: TorqTube
Model: 2Nm / 3Nm / 4Nm / 5Nm Professional Set
Manufacturer: Prestacycle
Brand: Prestacycle
Bundle SKU: 93800B
EAN:
UPC:
Country of Origin: Taiwan
Country of Design: USA
Warranty: 5 Years

Torque Performance

Included Preset Torque Values: 2 Nm, 3 Nm, 4 Nm, 5 Nm
Number of TorqTubes: 4
Torque System: Preset Torque Limiter
Torque Limiting Method: Internal Mechanical Overrun
Preset Torque Setting: Factory Set
Preset Torque Adjustable: No
Torque Units: Nm
Torque Accuracy: ±4%
Torque Release Feedback: Full Mechanical Overrun
Torque Limiting Reset: Automatic
User Adjustable: No
User Calibration Required: No
Calibration Method: Factory Calibrated
Calibration Stability: Spring Design Prevents Calibration Drift
Rated Torque Cycles: 10,000+ @ Preset Torque per TorqTube
Over-Torque Protection: Yes
Routine Maintenance: None Required

TorqTube Operation

Clockwise Operation: Torque Limiting
Counterclockwise Operation: Direct Drive for Unscrewing (No Torque Limiting)
Safe for Unscrewing: Yes
Maximum TorqTube Unscrewing Torque: 30 Nm
Power Tool Compatible: Yes, With Appropriate Adapter
Power Drill Compatible: Yes, With Appropriate Adapter
Power Screwdriver Compatible: Yes, With Appropriate Adapter
Power Tool Adapter Included: No

TorqTube Construction

Construction: All-Metal
Body Material: Steel with Aluminum Outer Housing
Torque Mechanism Material: Steel
Outer Housing Finish: Anodized Aluminum
2Nm Color: Black
3Nm Color: Grey
4Nm Color: Red
5Nm Color: Orange
Impact Resistance: Withstands Drops Exceeding 10 ft (3 m) Without Damage or Loss of Calibration
Patent Status: Patented
Primary Technology: Patented Preset Torque-Limiting Mechanical Overrun

Drive & Compatibility

TorqTube Drive Interface: Standard 1/4" Hex
TorqTube Input Interface: Standard 1/4" Hex
TorqTube Output Interface: Standard 1/4" Hex
Compatible Driving Tools: Prestacycle Ratchets and Compatible Standard 1/4" Hex Driving Tools
Compatible Bits: Standard 1/4" Hex Bits
Ratchet Maximum Torque: 60 Nm

Included Items

2Nm TorqTube: 1
3Nm TorqTube: 1
4Nm TorqTube: 1
5Nm TorqTube: 1
PrestaRatchet T-Ratchet: 1
100 mm Extension: 1
Round Bit Holders / Tool Stands: 2
S2 Steel 1/4" Hex Bits: 12
Carrying Case Included: No

Applications

Preset Torque Function: Yes
Available Preset Values in Set: 2 Nm, 3 Nm, 4 Nm, 5 Nm
Conventional Ratchet Function: Yes
Precision Final Tightening: Yes
Fast Tightening: Yes
Fast Loosening: Yes
Professional Shop Use: Yes
Home Mechanic Use: Yes
Travel Use: Yes
Race Support Use: Yes

Dimensions & Weight

2Nm TorqTube: 68 × 15.5 mm maximum; 51 g
3Nm TorqTube: 68 × 15.5 mm maximum; 51 g
4Nm TorqTube: 75.75 × 18.1 mm maximum; 76 g
5Nm TorqTube: 75.75 × 18.1 mm maximum; 76 g

Service & Support

Scheduled Service Required: None
TorqTube Replacement Parts Available: No
Storage Recommendation: Dry Environment
Packaging Type: Box / Sealed Poly Bag

Specifications subject to change without notice. Prestacycle continually improves products and reserves the right to update specifications without prior notice.

Disclaimers

Check with the manufacturer of your components and fittings for proper torque specifications. Always follow Manufacturer guidelines for installation and removal of nuts, bolts and screws.

California Proposition 65 Warning

This product can expose you to chemicals including Nickel (Metallic), Lead, Diisononyl Phthalate (DINP), Urethane (Ethyl Carbamate), 1,3-Butadiene or Styrene, which is known to the State of California to cause cancer or reproductive harm.

For more information, go to www.P65Warnings.ca.gov.

Prestacycle Statement:

• Products made with Stainless or Plated Steel contain Nickel (Metallic).
• Products made with Brass contain Federally accepted trace amounts of Lead.
• Most soft Plastics including Vinyl contain Diisononyl Phthalate (DINP) .
• Buna Rubber contains1,3-Butadiene and Styrene.

Prestacycle manufactures it’s products with these materials as they are the highest standard available to manufacture these products to suit their purpose. Prestacycle does not dispute any of the findings made by California or the Federal Government. The health and safety of our customers is very important to us. We will always take every step possible to insure our products are as safe as possible.

Prestacycle warrants TorqTubes to be free from defects in materials and workmanship for five years or within the rated product life cycle, whichever occurs first, under the conditions stated herein. This warranty does not apply to normal wear, misuse, modification, or operation beyond the product's specified limits. TorqTubes provide direct-drive counterclockwise operation for unscrewing up to the specified maximum of 30 Nm.

This warranty is expressly limited to repair or replacement of product found to be defective. Prestacycle assumes no liability for loss or damage due to failure of any product to perform satisfactorily. Prestacycle makes no other warranty, expressed or implied, except that of title. Any and all other warranties are expressly disclaimed.

This warranty applies under conditions of intended use and is exclusive of equipment subjected to: Failure to follow recommended service procedures, Excessive duty cycle, exposure to the elements, shipping damage and modification not authorized by Prestacycle. No warranty claims will be honored without prior authorization for repair from Prestacycle. Any replaced or repaired equipment will be warranted for the remainder of the warranty term only.