Many products at the high end of the racing market aim for low weight, which usually results in fragile wheels. This approach is only suitable for professional cyclists or those who aren't concerned about the cost of replacing products frequently. TUFF has an different different goal for durability and stiffness improving their appeal to the entire market.
https://goo.gl/rZrnq4 road bike wheels
https://goo.gl/pZT88F
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