Originally Posted by
shelbyfv
This is interesting, as it seems the 100 series is only used on the couple of least expensive road bikes. Anything $1000 and up (including Sora bikes) uses the 200 series or better. Their least expensive cross bike uses 200 series. If anyone is subject to obsessing about aluminum tubing, this could be a real worry!
No, even lower than that, Trek uses Alpha Aluminum on their entry level, sub $400 bikes with high-tensile steel forks:
FX | Trek Bikes