what parts to buy for a project dirt jumper. Forums › Mountain Bike Forum › what parts to buy for a project dirt jumper. Tweet Add to Flipboard Magazine. Viewing 0 reply threads Author Posts January 24, 2017 at 17:55 #206033 hello960 what parts should i buy? second hand? also what type of frame? Author Posts Viewing 0 reply threads You must be logged in to reply to this topic.