MTB. There's a lot of great trails here in the Bay Area. A few of us M3 locals ride together occasionally. Here's my bike: http://www.flickr.com/photos/radiant...in/photostream
(Santa Cruz Nomad)
OEM M3 GTS Splitter/Wing/Harness Bar/Rear Seat Delete, Ohlin R&T, Brembo BBK, Akrapovic GT4, Alekshop Oil Cooler, ESS Tune/Pulley, Recaro SPG, 18" BBS FI, CAE Shifter, Vorschlag Camber Plates, Bimmerworld Toe-Links/End-Links/Motor Mounts, RD Sport Front Sway, Turner Solid Subframe/Diff Bushings, Awron Gauge.