In the field of fishing equipment, the design of the spool of a long-distance casting reel is one of the core factors that affect casting performance. The edge design of the spool is directly related to the smoothness of the line release, the casting distance and its accuracy. Therefore, it is particularly important to have a deep understanding of its design characteristics when choosing a long-distance casting reel.

Shape of edge design
The edge design of the spool of a long-distance casting reel usually adopts a variety of shapes to optimize the release performance of the line. Common edge shapes include flat edges, beveled edges and curved edges.
Flat edge design: This design is relatively basic and suitable for a variety of fishing occasions. Flat edges can provide relatively stable line release, but may cause increased friction between the line and the edge during casting, thereby affecting the distance and accuracy of casting.
Beveled edge design: The beveled edge design effectively reduces the friction of the line during release through the inclined edge shape. This design can achieve smoother line release during casting, reduce the risk of coil distortion, and thus improve the distance and accuracy of casting.
Curved edge design: The curved edge design is an innovation in high-end long-distance casting reels in recent years. The curved edge can guide the line out more effectively, significantly reducing the friction and resistance during casting, and further improving casting performance. This design is particularly suitable for fishing occasions that require long-distance casting, which can significantly improve the angler's work efficiency.

Edge smoothness
The smoothness of the spool edge has a direct impact on the release performance of the line. High-quality long-distance casting reels usually use precision processing technology to make the edge of the spool extremely smooth. This smoothness can significantly reduce the friction of the line during the release process, thereby improving the smoothness and distance of casting.

Relatively speaking, low-quality reels may have rough edges, which will not only increase the wear of the line, but also may cause the line to entangle and knot during casting. Therefore, when choosing a long-distance casting reel, anglers should pay attention to the processing quality of the spool edge to ensure the best casting performance.

Edge height and spool depth
There is a close relationship between the height of the spool edge and the depth of the spool. The higher edge design can effectively prevent the line from slipping during casting, especially when using heavier fishing lines or fishing gear. This design provides anglers with a greater sense of security, ensuring that the line is not easy to fall off during casting.
However, the height of the rim also needs to match the depth of the spool. An overly high rim may cause the line to be less compact when stored, increasing the risk of coil twisting. Therefore, when designing a long-distance casting reel, designers must consider the rim height and spool depth to achieve the best line storage and release effect.

Anti-entanglement design of the rim
Modern long-distance casting reels pay more and more attention to anti-entanglement design, and many high-end reels have innovated in rim design. For example, some reels use special rim shapes or coatings to reduce the entanglement of the line during casting. This anti-entanglement design not only improves the smoothness of casting, but also reduces the difficulty of anglers' operation during casting, ensuring the smooth progress of fishing activities.