Tamiya released only one model equipped with the FOX chassis, which of course retains its name: model number 58051, which went on sale in 1985 and was available on the market until 1991.For Tamiya this is the third time, after the B2B Sidecar model 58017 and Pajero model 58044, that it has released a chassis available on the market with only one model.
Tamiya presents an absolute first on the FOX: it is the first model released with the yellow CVA shock absorbers that are installed on so many models. Tamiya has put a lot of resources into developing the CVA shock absorbers and today (2023) they are available on the market virtually unchanged in black. Guide on C.V.A. shock absorbers. There are several advertisements that Tamiya or the various importers around the world have published in trade magazines, in the image below is an example.
In the Guide Books published between 1981 and 1991, Tamiya presents several pictures showing FOX; on the left a picture of the model in action and on the right a sectional representation.
It is a two-wheel drive model at the rear that is clearly derived from Hot Shot, in particular there are several technical solutions in common with Hot Shot II model number 58062. These are the main features of the FOX chassis starting from the front moving towards the rear:
– large plastic front bumper that completely protects the two wheels,
– the central frame is made of double-shell plastic material to protect the electronics from splashes, dust, dirt and debris from the wheels. This solution has the disadvantage that it makes access to the electronics laborious; there are several screws holding the two parts together,
– independent double wishbone front and rear suspension,
– The single front shock and double rear shock configuration (accessory set number SP-5305 in common with several models such as Super Hot model number 58054) is the same for FOX and Hot Shot II.
The picture shows the frames of the FOX re-release (left) and Hot Shot II (right). The re-release of the FOX has a stabiliser bar, which is not present in the original model (except as an accessory) and lacks the two mechanical speed control resistors. The Hot Shot II re-release lacks the single resistor of the mechanical speed control. Although these pictures refer to the re-releases, they retain the configuration of the original versions for the shock absorbers. These photos clearly show the suspensions having a similar layout; even the centre-rear battery position is the same for the two models.
– The rear and front hubs echo the configuration of the Hot Shot II; on the left in the picture is highlighted front left and rear right hub of the Fox and on the right is highlighted front right and rear left hub of the Hot Shot II. Obviously the front hub of the FOX does not accommodate the drive axle present in the Hot Shot II,
– the four wheels are the same as the Wild One model 58050 but are gold in colour, a colour that is lost in use; and
– the electric motor is the RS-540S model.
FOX was re-released for sale in 2013 and 2017 without changing the numbering under the name NOVAFOX, model number 58577.
The differences between the original model and the re-release are:
– some stickers change between the two versions, intellectual property and trade mark laws changed between 1985 and 2011. It is not possible to reproduce a company logo without permission or by paying royalties; for example, the stickers for Weber, Pennzoil, Monroe or Jackman carburettors have disappeared and become Promatic, Forward, Zpoint or Poker respectively
– FOX has no front anti-roll bar as standard, NOVAFOX has front anti-roll bar as standard. Pictured is the FOX solution on the left and the NOVAFOX solution on the right with the front anti-roll bar highlighted in blue,
Accessory number SP-5272 is available for FOX in 1984; in the picture on the left you can see the parts list and in the middle and right picture you can see the anti-roll bar installed on the car. The parts set for the front anti-roll bar for the FOX is completely different from that of the NOVAFOX; the bar on the FOX has space outside the body and the bar on the NOVAFOX has space under the body. For both models, the anti-roll bar improves the driving experience because it is an accessory that reduces the car’s understeer. Understeer is a characteristic feature of the FOX chassis because the weight is concentrated mainly in the rear where the motor and battery are installed; this weight distribution improves traction and worsens steering precision,
– FOX is equipped with mechanical speed control with two resistors, NOVAFOX is equipped with electronic speed control. The mechanical speed control is another part that unites FOX and HOT SHOT; on the left is highlighted the speed control system of FOX and on the right is highlighted the speed control system of SUPER HOT model 58054; they are visually closely related,
-the rear axle of the FOX has a dust cap (left in the picture cap and axle highlighted in red) and the rear axle of the NOVAFOX has no dust cap (right in the picture axle highlighted in blue). The two axles have a completely different shape.
– on the left the axle locking system for the front hub complete with C-shaped metal plate (highlighted in red in the picture) for FOX and on the right the much simpler solution consisting of nut and washer for NOVAFOX (highlighted in blue in the picture),
– on the left the steering system with servo for FOX and on the right for NOVAFOX. In the NOVAFOX system, a layer of soft rubber was added (highlighted in brown in the picture).