DYISLAND SDM4 Four-Piston Mountain Bike Hydraulic Disc Brake Set – 【2026 NEW】
Description
⭐ 1. Powerful 4-Piston Braking Performance
Equipped with a 4-piston hydraulic caliper, delivering stronger and more consistent braking force for enhanced control and safety on downhill and mountain trails.
⭐ 2. Open Hydraulic System for Stable Performance
Features an open hydraulic system with automatic oil compensation, maintaining consistent bite point and braking feel over time while reducing the need for frequent adjustments.
⭐ 3. Lightweight & Durable 6061 Aluminum
Made from aerospace-grade 6061 aluminum with CNC precision machining, offering an ideal balance of strength, durability, and lightweight performance.
⭐ 4. Tool-Free Reach & Free Stroke Adjustment
Easily customize lever reach and free stroke without tools. Adjust braking response to match your hand size and riding style for maximum comfort and control.
⭐ 5. Ceramic Brake Pads – Quiet & Long-Lasting
High-performance ceramic pads provide excellent heat dissipation, low noise, and superior wear resistance while minimizing rotor wear.
📌 Optional Add-On Highlights (for description section)
- Recommended for ≥180mm rotors for optimal braking power and heat dissipation
- Automatic pad wear adjustment for consistent performance
- Ergonomic 2-finger lever design for better control
- Compact 4-piston caliper design
- ⚠️ Adapter/mount not included (sold separately)
180-Day Warranty
DYISLAND brake kits are warranted against manufacturing defects for 180 days from the date of purchase.
If your product qualifies for warranty, we will repair it and cover the cost of parts, labor, and other necessary expenses.
If you need a repair or replacement that is not covered by warranty, please contact us. We will do our best to support you - often we can help diagnose the problem and provide a replacement part for a fee to complete the repair.
Free Shipping
DYISLAND supports delivery to North America, the European Union, and some countries/regions. The standard delivery time is 7–15 working days, and the specific time may vary depending on the logistics arrangement and the customs clearance process at the destination.
Due to logistics or policy restrictions, some areas may not support delivery.
Please confirm whether your delivery address is within the supported range before checkout.
If your delivery area is not listed, please contact us to confirm whether delivery is possible
30-Day Return
DYISLAND supports 30 days of worry-free returns. If you are not satisfied with the product you purchased, you can apply for a return within 30 days of purchase. Please make sure the packaging is intact to avoid damage during transportation. The return shipping cost is borne by the buyer.
If the return is due to a defective part, we are happy to provide a replacement part to solve the problem and ensure that you can resume use as soon as possible.
After confirming that the returned product meets the return conditions, we will process a refund after product inspection. The refund will be issued through the original payment method.
Please note that products with man-made damaged or missing parts will not be refunded.
If you have any questions or need help, please feel free to contact our customer service team
