STAR UNION 300X E-Bike Thumb Throttle – 3-Pin Julet, IPX5 Waterproof

$9.90
$9.90
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Key Feature:

1. 300X thumb throttle designed for electric bikes and electric scooters.
2. 3-pin Julet waterproof connector supports easy plug-and-play installation.
3. Precise Hall sensor control provides smooth and responsive acceleration.
4. IPX5 waterproof protection helps support daily riding in wet conditions.
5. Fits standard 22.2mm handlebars and supports left or right side mounting.
Product description

SMOOTH THROTTLE CONTROL FOR E-BIKES

Upgrade your eBike with the STAR UNION 300X thumb throttle.

Designed for electric bikes and electric scooters, this throttle features a 3-pin Julet waterproof connector, precise Hall sensor control, IPX5 waterproof protection, and an open-lock clamp design for easier installation.

• 3-pin Julet waterproof connector
• Smooth Hall sensor throttle control
• 0–50° precise rotation adjustment
• IPX5 waterproof protection
• Fits standard 22.2mm handlebars
• Supports left or right side mounting


SMOOTH HALL SENSOR CONTROL

The 300X thumb throttle uses Hall sensor control to provide smooth and responsive acceleration.

It helps deliver a natural speed control feel for daily eBike riding, commuting, and scooter use.


EASY OPEN-LOCK INSTALLATION

The open-lock clamp design allows quick installation without removing the grip or brake lever.

It supports both left and right side mounting to match different riding habits.


3-PIN JULET WATERPROOF CONNECTOR

The universal 3-pin Julet waterproof connector supports easier wiring and replacement on compatible eBike systems.

Please compare your original connector before ordering.


LIGHTWEIGHT AND WATERPROOF DESIGN

Made from PA+GF reinforced material, the 300X throttle is lightweight, durable, and suitable for daily riding.

IPX5 waterproof protection helps protect internal components from rain and splashes.


CHECK COMPATIBILITY

Before ordering, please confirm:

• Your bike uses a compatible 3-pin Julet connector
• Your handlebar diameter is 22.2mm
• The 300mm cable length is suitable for your setup
• Your controller supports a 0.8–4.2V throttle signal

Not sure if it fits?

Send us photos of your current throttle connector, handlebar, and controller wiring. We will help you check compatibility.


WHAT’S INCLUDED

• 1 × STAR UNION 300X thumb throttle

NOT INCLUDED

• Controller
• Display
• Extension cable
• Installation tools


PRODUCT DETAILS

Model: 300X
Product type: E-bike thumb throttle
Connector: 3-pin Julet
Waterproof rating: IPX5
Output voltage: 0.8–4.2V
Rotation angle: 0–50°
Cable length: 300mm
Handlebar compatibility: 22.2mm
Material: PA+GF
Weight: Approx. 35g


FREQUENTLY ASKED QUESTIONS

Is this throttle compatible with all eBikes?

No. Please confirm your connector type, controller signal, and handlebar size before ordering.

What connector does it use?

It uses a 3-pin Julet waterproof connector.

What handlebar size does it fit?

It fits standard 22.2mm handlebars.

Can it be installed on the left or right side?

Yes. It supports left or right side mounting.

Is it waterproof?

It has IPX5 waterproof protection for daily riding in wet conditions.

Shipping & Return

Most U.S. orders ship from our U.S. warehouse and are usually delivered within 3–6 days.

Orders to other countries, out-of-stock items, and customized products may ship from China and are usually delivered within approximately 14 days.

We want you to be completely satisfied with your purchase. If you have any questions, concerns, or complaints, please contact our online support team or email us at grt@star-union.net. We will respond within 8 hours.

Items can be returned or exchanged within 30 days of delivery. Please contact us before returning an item so we can help you with the next steps.