I'm new to this forum, and I usually ride by myself, so I am baffled by the abbreviations that everyone else seems to know. I searched with no luck. How about some help with corrections or additions to the list below, so I feel a little less like an idiot?

BB - Bottom Bracket

Brifter - mounted on the handlebar and serves as a brake lever and shifter.

FD - Front Derailleur

GMR - Glendora Mountain Road

GRR - Glendora Ridge Road

LART - Los Angeles River Trail - runs from Egret Park (near the intersection of the Los Angeles River and I5) all the way to the northwest corner of Griffith Park (near the intersection of Forest Lawn and the Ventura (134) Freeway.

LBS - Local Bike Shop

RD - Rear Derailleur

SART - Santa Ana River Trail - (officially the Santa Ana River Trail and Parkway SARTP) - runs from the ocean where Huntington Beach and Costa Mesa meet all the way to the Chino Valley Freeway (71) on the West side of Corona.

SGRT - San Gabriel River Trail - between it and the bike trail on the other side of the river (Coyote Creek Bikeway), it runs from the ocean in Seal Beach all the way to Foster Rd in La Mirada (?).

Ti - Titanium

Others - ???