Join Date: Feb 2008
Location: Oxnard, CA
Bikes: '08 Fuji Roubaix RC; '07 Schwinn Le Tour GS; '92 Diamond Back Ascent EX
"29er" refers to wheel size. 26" was the MTB size standard for many years but 29" is quickly gaining popularity. At 300 lbs. and a budget of $300, I'd suggest looking for a used, non-suspended MTB. You'll probably need a frame size around 22" given your height but a lot depends on your proportions. You may find anything from 20" up to 23" fits you. Check Craig's List in your area to see if there is anything out there your size and try to stick with the better brands (Cannondale, Specialized, Diamond Back, Trek, etc.) and, again, stay away from full-suspension or suspension forks. Should be able to get something for less than $200 which leaves a little to get it cleaned up and ready to go.