1. المقدمة
Thank you for choosing the ROCKBROS MBS 20-Inch Folding Bike. This manual provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your new bicycle. Please read this manual thoroughly before your first ride and keep it for future reference. Proper understanding and adherence to these instructions will ensure a safe and enjoyable cycling experience.
2. انتهى المنتجview
The ROCKBROS MBS 20-Inch Folding Bike is designed for portability and convenience, featuring a lightweight aluminum frame and an efficient Shimano 8-speed drivetrain. It is suitable for commuting, recreational rides, and travel.
المميزات الرئيسية:
- Lightweight Aluminum Frame: Weighing approximately 25 lbs, the aluminum alloy frame is 30-40% lighter than traditional steel frames, enhancing portability.
- تصميم قابل للطي صغير الحجم: Folds quickly to a compact size of 31.49" × 27.56" × 14.57" for easy storage and transport.
- Shimano 8-Speed Drivetrain: Provides smooth and precise gear changes for various terrains.
- V-Brakes: Front and rear V-brakes offer reliable stopping power.
- المكونات القابلة للتعديل: Seat post and handlebar are adjustable to accommodate riders from 4'7" to 6'1" (140-185 cm) and support up to 220 lbs.
- 20-Inch Wheels: Optimal size for urban environments and portability.

Image: The ROCKBROS MBS 20-Inch Folding Bike is lightweight and easy to carry, demonstrated by a woman effortlessly carrying it up stairs.

Image: The ROCKBROS MBS 20-Inch Folding Bike in use, highlighting its design for urban commuting and leisure.
المنتج انتهىview فيديو
Video: This video provides a brief overview of the ROCKBROS MBS 20-Inch Folding Bike, showcasing its lightweight and portable design.
3. الإعداد والتجميع
Your ROCKBROS MBS 20-Inch Folding Bike comes mostly pre-assembled. Follow these steps for final setup before your first ride.
فك الصندوق والفحص الأولي
- أخرج الدراجة من عبوتها بعناية.
- Inspect all components for any signs of damage during shipping. Contact customer support immediately if you find any issues.
- قم بإزالة جميع مواد التغليف الواقية.
فيديو فتح العلبة
Video: This video demonstrates the unboxing process of the ROCKBROS MBS 20-Inch Folding Bike, guiding you through initial setup steps.
Adjusting Seat Post and Handlebar
- مشاركة المقعد: Loosen the quick-release lever on the seat post clamp. Adjust the seat height so that your leg has a slight bend at the knee when the pedal is at its lowest point. Ensure the seat post is inserted past the minimum insertion line. Securely close the quick-release lever.
- المقود: Loosen the quick-release lever on the handlebar stem. Adjust the handlebar height to a comfortable position, ensuring it is aligned straight with the front wheel. Securely close the quick-release lever.

Image: Detailed dimensions and specifications of the bike, including recommended rider height and maximum load capacity.
Usage Instructions Video
Video: This video provides detailed instructions on how to use and adjust the ROCKBROS MBS 20-Inch Folding Bike, including folding and unfolding.
4. تعليمات التشغيل
تتكشف الدراجة
- ضع الدراجة المطوية على سطح مستو.
- Release the frame latch (usually located in the middle of the main frame).
- Unfold the frame until it locks into place. Ensure the latch is securely fastened.
- Unfold the handlebar stem and secure its quick-release lever.
- Adjust the seat post and handlebar to your preferred riding height.
- افتح الدواسات إذا كانت قابلة للطي.
طي الدراجة
- Lower the seat post to its lowest position.
- Fold the pedals inward if they are foldable.
- قم بتحرير ذراع التحرير السريع الموجود على جذع المقود وقم بطي المقود لأسفل.
- Release the main frame latch and fold the bike in half. Ensure the frame is securely latched in the folded position.

Image: The bike's compact folded size allows for easy storage in a car trunk or on public transport.
نظام تغيير السرعات (شيمانو 8 سرعات)
Your bike is equipped with a Shimano 8-speed drivetrain for efficient pedaling across different terrains.
- استخدم ذراع تغيير السرعات الموجود على المقود الأيمن لتغيير التروس.
- Shift to a lower gear (larger cog on the rear wheel) for easier pedaling on inclines.
- Shift to a higher gear (smaller cog on the rear wheel) for faster speeds on flat or downhill sections.
- Always pedal lightly when shifting gears to ensure smooth transitions and prevent damage to the drivetrain.

Image: Detail of the Shimano 8-speed system, ensuring smooth gear changes.
Braking (V-Brakes)
The bike features V-brakes on both the front and rear wheels.
- يتحكم الذراع الأيمن في الفرامل الخلفية، ويتحكم الذراع الأيسر في الفرامل الأمامية.
- Apply both brakes simultaneously for controlled stopping.
- Avoid sudden, hard application of the front brake, especially at high speeds, as this can cause loss of control.
5. الصيانة
Regular maintenance is crucial for the longevity and safe operation of your bicycle.
الرعاية العامة
- تنظيف: Regularly clean your bike with mild soap and water. Avoid high-pressure washers, which can force water into bearings.
- تشحيم: Keep the chain clean and lubricated with appropriate bicycle chain lubricant. Lubricate every 100-150 miles or after riding in wet conditions.
- ضغط الإطارات: Check tire pressure before each ride. Maintain the pressure recommended on the tire sidewall.
- فحص الترباس: Periodically check all bolts and quick-release levers to ensure they are securely tightened.
Brake and Gear Adjustment
- الفرامل: Ensure brake levers engage smoothly and the brake pads make full contact with the wheel rim. Adjust cable tension if brakes feel too loose or too tight.
- التروس: If shifting becomes rough or gears skip, the derailleur may need adjustment. Consult a professional bike mechanic if you are unsure.
6. استكشاف الأخطاء وإصلاحها
| مشكلة | السبب المحتمل | حل |
|---|---|---|
| إطار مثقوب | ثقب، ضغط منخفض | Inspect tire for punctures, repair or replace inner tube, inflate to correct pressure. |
| لا يتم تغيير التروس بسلاسة | Cable tension, dirty chain, bent derailleur | Clean and lubricate chain. Check shifter cable tension. Consult a mechanic if derailleur is bent. |
| الفرامل تشعر بالضعف | Worn pads, loose cable, dirty rims | Check brake pad wear and replace if necessary. Adjust brake cable tension. Clean wheel rims. |
| Squeaking/Creaking Noises | Loose components, dry chain, unlubricated parts | Check all bolts and quick releases. Lubricate chain and pivot points. |
7. المواصفات
| ميزة | مواصفة |
|---|---|
| نوع الدراجة | دراجة قابلة للطي |
| حجم العجلة | 20 بوصة |
| مادة الإطار | سبائك الألومنيوم |
| عدد السرعات | 8 (Shimano Drivetrain) |
| نمط الفرامل | فرامل V (أمامية وخلفية) |
| نوع التعليق | جامد |
| وزن | حوالي 25 رطل (11.34 كجم) |
| توصية الوزن الأقصى | 220 رطل (100 كجم) |
| الحد الأدنى لطول المستخدم | 4'7" (140 سم) |
| Intended Riding Terrain | Paved Roads |
| الأبعاد المطوية (الطول × العرض × الارتفاع) | 31.49 بوصة × 27.56 بوصة × 14.57 بوصة (80 سم × 70 سم × 37 سم) |
8. معلومات السلامة
Always prioritize safety when riding your bicycle.
- ارتدِ دائمًا خوذة تتوافق مع معايير السلامة.
- Ensure all quick-release levers and bolts are securely tightened before each ride.
- Check tire pressure, brakes, and steering before every ride.
- Ride defensively and be aware of your surroundings, including traffic and pedestrians.
- Use appropriate lighting (front and rear) when riding in low-light conditions or at night.
- التزم بجميع قوانين ولوائح المرور المحلية.
- تجنب الركوب تحت تأثير الكحول أو المخدرات.
- لا تتجاوز الحد الأقصى الموصى به للوزن وهو 220 رطلاً (100 كجم).
9. الضمان والدعم
ROCKBROS products are designed for quality and durability. For specific warranty details, please refer to the warranty card included with your purchase or visit the official ROCKBROS website. If you encounter any issues or require technical assistance, please contact ROCKBROS customer support through the retailer where you purchased the bike or via the contact information provided on the official ROCKBROS webموقع.