2005 - Mobile Crane
|8415 Dump Truck
|8418 Mini Loader
|8420 Street Bike
||8421 Mobile Crane
|8649 Nitro Menace
||8653 Enzo Ferrari
The 8421 crane came with a set of yellow brackets which are used to connect a pair of pneumatic actuators back-to-back in series (as shown) to increase the overall length and stroke. While successful at this goal, these parts only ever appeared in one other set, and that set did not even have pneumatics. Because of the popularity of pneumatics among fans and the need for longer length, these brackets are highly prized and very expensive to acquire.
The 8420 motorcycle introduced a new adjustable shock absorber. This very large has a stiff spring and an adjustable collar. If rotated 90 degrees, the collar slides up a ramp and preloads the spring resulting in a harder suspension (although the rate stays the same). Both positions are pictured. The yellow version of this shock only ever appeared in the one set. Some versions of the set came with a dark gray version instead. That version also never appeared in another Technic set but did appear in some Racers.
The 8420 motorcycle introduced a new transparent black windshield, unique to that set.
A new 32L axle was introduced, the longest ever produced. It was needed for the long telescoping boom of the 8421 crane. The notched 2L axle was also changed to red to meet the new color coding policy and make sorting easier. The older black pins are prized for their neutral color.
The line of double bevel gears was expanded to include a large 36 tooth version, nearly always black. This gear appears in only a handful of Technic sets.
Wheels and Tires
The small 43.2 x 22 tires included in the 8415 truck have a strange tread and never appeared in another Technic set. The large, spectacular front and rear wheels and tires of the 8420 motorcycle are unique to that set and never appeared again. Both front and rear use the same wheel but the rear tire is wider than the front. The tire is solid rubber (not pneumatic) and therefore quite difficult to install and remove from the wheel.