Whats the most important factor when choosing a chain for road bike endurance racing: durability, weight, or shifting smoothness? Ive seen some riders swear by ultra-light chains that shed grams but require more frequent replacements, while others prioritize chains with advanced coatings or treatments that supposedly reduce wear and tear. But does the added cost of these high-tech chains really translate to significant performance gains or improved reliability over the course of a long endurance event? Are there any chains out there that strike a perfect balance between these competing demands, or is it always a trade-off between one benefit and another?