On off.road.cc, find the comprehensive guide for SRAM's 2025 mountain bike drivetrains. Using the article's table of contents, compare the Eagle 90 and Eagle 70 systems, specifically noting their availability, chainring materials, and chain types. Also, state 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'. Identify the publication date of the article. Locate the table of contents within the article. Click on the link for 'Eagle 90 Transmission' in the table of contents. Extract details on Eagle 90's availability, chainring material, and chain type. Click on the link for 'Eagle 70 Transmission' in the table of contents. Extract details on Eagle 70's availability, chainring material, and chain type. 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 as 'Jun 10 2025'. Accurately describe the availability of Eagle 90 as 'Aftermarket' and Eagle 70 as 'OEM only'. Correctly identify the chainring material for Eagle 90 as 'Stamped steel' and for Eagle 70 as 'Aluminum crankset with three-bolt T-Type chainring'. Correctly identify the chain type for Eagle 90 as 'Borrowed from GX T-Type' and for Eagle 70 as 'Its own Flattop chain with a polished steel finish and solid pins'.