I'm interested in SRAM's 2025 mountain bike drivetrains. On off.road.cc, find the comprehensive guide explaining them. Compare the Eagle 90 and Eagle 70 systems, detailing their availability, chainring materials, and chain types. Also, provide the publication date of the guide.
Navigate to off.road.cc. Locate and click on the article titled 'SRAM MTB drivetrains 2025: SX to XX SL Transmission explained'. Scroll through the article to find the 'Eagle 90 Transmission' section and extract details on its availability, chainring material, and chain type. Scroll further to find the 'Eagle 70 Transmission' section and extract details on its availability, chainring material, and chain type. Identify and state the publication date of the article. Synthesize the gathered information to compare Eagle 90 and Eagle 70.
Successfully navigate to the article 'SRAM MTB drivetrains 2025: SX to XX SL Transmission explained'. State the publication date of the article. Accurately describe the availability of Eagle 90 (aftermarket) and Eagle 70 (OEM only). Correctly identify the chainring material for Eagle 90 (stamped steel) and Eagle 70 (aluminum crankset with three-bolt T-Type chainring). Correctly identify the chain type for Eagle 90 (borrowed from GX T-Type) and Eagle 70 (its own Flattop chain with a polished steel finish and solid pins).