Interesting article. On the point about weight vs durability and price, SRAM
has a couple products that seem to have gone a bit under the radar. The GX1
1150 cassette has a steel 42 tooth cog whereas the higher series cassettes use
aluminum and cost twice as much. Shift quality seems just as good. True there
is a weight penalty relative to the higher end SRAM offerings, but it is still
lighter than the Shimano XT 11-42 cassettes. SRAM is also offering steel 28,
30 and 32 tooth front chain rings in the $30 range.