Originally Posted by
wongdg
I found it hard to find the exact type of BB on a Trek 920 beside "sealed cartridge". On another forum I found photos of the older 920 (strange-looking-bottom-bracket-590056.html on mtbr.com). Is your 920 BB still remained the same type? (pardon me on the above link as this bulletin board would not allow me to post pcitures and urls yet)
It's a SRAM GXP english threaded external cup bottom bracket.