Планетарная втулка | Преимущества и недостатки

The planetary hub has many advantages and was invented before the advent of the conventional multi-speed chain drivetrain. In the first decades of its existence, the differential hub was very common, but today it's mostly found only on city bikes. The epicyclic hub now offers a wide gear range, up to 526% (Rohloff rear hub), which is even greater than the SRAM XX1. But why don't athletes use the planetary hub? Not in mountain biking, not on the road, not even in gravel? We decided to explore the advantages of the planetary hub, as well as its disadvantages. In addition to Rohloff, planetary hubs are produced by such well-known brands as Shimano Nexus, Shimano Alfine8, Shimano Alfine11, Shimano Alfine Di2, Sram T3, Sram P5, Sram S7, Sram G8, Sram I-Motion 9, and Sram E-Matic. However, Sram discontinued development and production of these products in 2017. Sturmey Archer is also a leading manufacturer of planetary hubs, with over 100 years of history. However, internal gear shifting hubs have many disadvantages that prevent them from being used on many bicycles. The nuances of selecting a planetary hub, the cost, adapting it to a specific bicycle frame, and the complexities of finding spare parts and maintaining the hub all hinder their widespread adoption. Gear range formula: For a drivetrain with 1 front sprocket: A/B*100% Where A is the number of teeth on the largest sprocket B is the number of teeth on the smallest sprocket. For a drivetrain with 2 or 3 front sprockets: (A/B*C/D)*100% ((C/B)/(D/A))*100% Where A is the number of teeth on the largest sprocket B is the number of teeth on the smallest sprocket. C - Number of stars on the large front chainring D - Number of stars on the small front chainring Timing: 00:00 - We decided to film about planetary hubs 01:10 - History and design 02:45 - Advantages of an epicyclic hub 07:22 - Disadvantages of a planetary hub 08:52 - Weight difference 11:02 - Planetary gear range 13:11 - Nuances of using a planetary hub 14:05 - Conclusion Follow us on social media: Vasya on Instagram:   / kapushak_vasile   Dima on Instagram:   / shmumpel   Thanks to you, the content can become even better:   / vasile   #planetaryhub #planetary #bicycle