No, not all brake lines are superficially rusted. The extent of rust on brake lines can vary depending on factors such as the age of the vehicle, the climate it is exposed to, and how well it has been maintained. It is important to regularly inspect brake lines for any signs of rust or corrosion, as this can compromise the integrity of the brake system and lead to potential safety hazards. **

Steel braided brake lines offer several advantages over regular brake lines on motorcycles. They provide increased durability and resistance to wear and tear, which can result in a longer lifespan and reduced maintenance costs. Additionally, steel braided brake lines offer improved brake feel and responsiveness, allowing for better control and modulation of braking power. They also have a higher tolerance for heat and pressure, making them less likely to expand under heavy braking, resulting in consistent performance. **

It is not recommended to preserve brake lines with grease. Grease can attract dirt and debris, potentially causing damage to the brake system. It can also affect the performance of the brakes by reducing friction between the brake pads and rotors. It is best to use brake line-specific lubricants or follow the manufacturer's recommendations for preserving brake lines. **

You can buy replacement brake pads for a disc brake for an E-MTB at your local bike shop or at online retailers that specialize in bike parts and accessories. Some popular online options include websites like Amazon, Jenson USA, REI, and Chain Reaction Cycles. Make sure to check the specific model and type of brake pads that are compatible with your E-MTB's disc brake system before making a purchase. **

Based on the lines on the brake disc, it appears that the disc is worn out. The presence of deep grooves, cracks, or uneven wear on the surface of the disc indicates that it has reached the end of its lifespan. These lines are a sign of excessive wear and tear, and can lead to reduced braking performance and safety issues. It is important to replace the brake disc if it shows these signs of wear to ensure proper functioning of the braking system. **

An alternative for a brake fluid hose could be a high-pressure hydraulic hose that is compatible with brake fluid. It is important to ensure that any alternative hose used is specifically designed to handle the high pressure and corrosive nature of brake fluid to ensure the safety and effectiveness of the braking system. It is always best to consult with a professional mechanic or refer to the vehicle's manufacturer specifications when considering alternatives for brake components. **

Without pictures, it is difficult to determine if a brake pad replacement was necessary. However, if the brake pads were worn down to the minimum thickness or were showing signs of damage or uneven wear, then a replacement would likely be necessary. It is important to visually inspect the brake pads and consult with a professional mechanic to determine if a replacement is needed. **

No, not every Cannondale brake disc will fit every brake. Different brakes have different specifications for the size and mounting of the brake disc. It is important to ensure that the brake disc you are purchasing is compatible with the specific model and type of brake you have. Always check the manufacturer's specifications and recommendations to ensure a proper fit and safe operation. **