







Shipping Fees:
We provide clear and detailed shipping fees based on the order amount and shipping method:
- Standard Shipping:
- Order Amount Below $29: Shipping Fee - $4.99
- Delivery Time: 3-4 business days
- Free Shipping:
- Order Amount $29 and over: Free 📦
Shipping Info
🚲 Bicycle Shipping
Delivery Times:
Shipping Fees:
We offer a 30-day hassle-free return and exchange policy starting from the date you receive your item. To be eligible, products must be unworn, unused, with tags attached, in original packaging, and accompanied by proof of purchase. If the item is defective, damaged, or incorrect, we cover the return shipping cost; for size or personal preference returns, the customer is responsible for shipping fees. Please inspect your order within 72 hours and contact us for any issues. EU customers have a 14-day no-questions-asked return right. Refunds will be processed within 10 business days after we receive and inspect your return. Please contact customer service before returning items and send returns to the designated address; unauthorized returns will not be accepted. For questions, email service@rockbrosbike.us.
At ROCKBROS, we offer a worry-free 2-year warranty to ensure your satisfaction. Whether it's a defect or product issue, simply reach out to us at service@rockbrosbike.us with your order details. We'll handle the rest to make sure your experience is smooth and hassle-free.

The Himiway D5 Pro ST (Step-Thru) is a premium, all-terrain electric fat bike that seamlessly combines extreme durability and mid-drive power with the ultimate convenience of an accessible step-through frame. Designed for riders who want the rugged "tank-like" performance of a premium off-road bike without the hassle of swinging a leg over a high top tube, the D5 Pro ST makes all-terrain exploration accessible to everyone.
Whether you're cruising through hilly backroads, riding on sandy beaches, or running daily errands, the D5 Pro ST offers unparalleled stability and ease of use. Its foundation is an upgraded 6061 aerospace-grade aluminum step-through frame that is twice as thick as conventional e-bikes. This design provides massive structural integrity while making mounting and dismounting effortless—an absolute game-changer if you have limited mobility or are carrying a heavily loaded rear rack. Paired with puncture-resistant 26" x 4.0" Kenda K-shield fat tires, it delivers relentless grip and shock absorption across gravel, mud, and snow.
What truly sets the D5 Pro ST apart is its advanced 500W Torque-Sensing Mid-Motor (peaking at 1300W). Delivering a massive 130Nm of torque directly to the drivetrain, it flattens the steepest hills with ease. The intuitive torque sensor responds instantly to your pedaling effort, providing a smooth, natural riding experience that feels like a traditional bike but with superhuman strength—perfect for a balanced workout or injury recovery.
Despite its accessible design, the D5 Pro ST compromises nothing on heavy-duty utility. With a staggering 400 lb payload capacity and a seamlessly integrated 960Wh Samsung/LG battery, it provides up to 80 miles of anxiety-free range per charge. Premium components like a 9-speed Shimano drivetrain, fade-free hydraulic disc brakes, and an integrated auto-illuminating brake light ensure absolute safety and control wherever your journey takes you.
The Himiway D5 Pro ST (Step-Thru) is a premium, all-terrain electric fat bike that seamlessly combines extreme durability and mid-drive power with the ultimate convenience of an accessible step-through frame. Designed for riders who want the rugged "tank-like" performance of a premium off-road bike without the hassle of swinging a leg over a high top tube, the D5 Pro ST makes all-terrain exploration accessible to everyone.
Whether you're cruising through hilly backroads, riding on sandy beaches, or running daily errands, the D5 Pro ST offers unparalleled stability and ease of use. Its foundation is an upgraded 6061 aerospace-grade aluminum step-through frame that is twice as thick as conventional e-bikes. This design provides massive structural integrity while making mounting and dismounting effortless—an absolute game-changer if you have limited mobility or are carrying a heavily loaded rear rack. Paired with puncture-resistant 26" x 4.0" Kenda K-shield fat tires, it delivers relentless grip and shock absorption across gravel, mud, and snow.
What truly sets the D5 Pro ST apart is its advanced 500W Torque-Sensing Mid-Motor (peaking at 1300W). Delivering a massive 130Nm of torque directly to the drivetrain, it flattens the steepest hills with ease. The intuitive torque sensor responds instantly to your pedaling effort, providing a smooth, natural riding experience that feels like a traditional bike but with superhuman strength—perfect for a balanced workout or injury recovery.
Despite its accessible design, the D5 Pro ST compromises nothing on heavy-duty utility. With a staggering 400 lb payload capacity and a seamlessly integrated 960Wh Samsung/LG battery, it provides up to 80 miles of anxiety-free range per charge. Premium components like a 9-speed Shimano drivetrain, fade-free hydraulic disc brakes, and an integrated auto-illuminating brake light ensure absolute safety and control wherever your journey takes you.
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