A streetjammer is a carriage or wagon with a streetjamming helm attached. The most distinctive feature of any streetjammer is the guidance mechanism attached to the helm. This may be a simple steering wheel similar to those found on modern vehicles, it may be more similar to a ship's wheel, or it might be a stick or even, in older models, a set of reigns and levers designed to accommodate a driver more used to steering a pair of horses.
Streetjammer: Helm: streetjammer; SZ: Large; Face: 10 ft. by 10 ft.; Crew 1/5 (untrained/+0); Mtl: Wood (5); hp: 3d10 (average 16); Init: -2; Spd: 80 (good, land only); AC 9 (-1 size); Atck: None; SA: bludgeoning; SQ: None; LC: Land; Cargo: 1/2.
Helm, Streetjammer: The standard streetjammer helm takes the form of a padded leather chair with footpedals and a guidance control (a wheel, a stick, or other mechanism). When installed on a carriage or wagon, the streetjammer helm grants that conveyance the ability to move under its own power, with a base speed of 80 ft. The streetjammer helm may be operated by anyone seated upon it.
Caster Level: 6th; Prerequisites: Craft Wondrous Item, haste; Market Price: 10,000 gp; Weight: 250 lbs.