Gyro Engine Gear
Spin Gear: Gyro Engine Gear
Weight: 21.2g (including 2x stock plastic bearings weighing 0.04g each)
Must be used with Engine Stopper Base which doesn't support a WD, meaning the fact it is technically the heaviest Spin Gear is mere trivia.
Main EG gimmick is a bearing-mounted gyro section with CEW support which connects to the AR and Engine Stopper Base only via the two bearings.
Both bearings are legally interchangeable with others, however the top can have fitment issues with some molds of the casings and certain variations, and the bottom one requires some force to access, either removing the prongs or the spacer. If removing the spacer, one should be careful to put it back in the same position (generally by marking the shaft) to ensure stable usage.
In this mode, Gyro Engine Gear can be launched by pushing a ripcord through the base on either side for left and right spin - this makes it technically the first Dual Spin Beyblade and therefore perhaps the progenitor of the HMS series, Gravity Perseus, and Variares. It is also the only way to legally use Four Layer System ARs such as Roller Defense Ring in Left Spin.
Other gimmick is a switch that holds the gyro part in place, allowing the Beyblade to be launched as usual. This has no competitive use.
Interestingly, it is generally best used with its stock CEW, Metal Sharp which provides by far the most controlled behaviour while also being relatively short - important for retaining stability, the largest challenge the part faces.
The various gimmicks make Gyro Engine Gear a ruling nightmare with multiple legal ways to launch and specific rulings required for operation. I will quote directly from the rules below:
Gyro Engine Gear may be legally launched in one of three ways:
If using only a launcher, the Beyblade is to be launched in line with standard launch protocol.
If only using the Engine Gear to launch without a launcher, you must place the Beyblade at the Tornado Ridge of the BeyStadium. If the BeyStadium does not have a Tornado Ridge, you must place it approximately 3cm from the edge of the BeyStadium wall. In this case, you must be sure to release the Beyblade from your hand onto the BeyStadium floor during the word “shoot! with the tip of the CEW making first contact with the floor of the BeyStadium.
If using both the Engine Gear and a launcher, the Engine Gear must be spun during the countdown, and the Beyblade launched from the launcher during the word "shoot!" as normal.
When replacing both bearings with Shielded Ball Bearings, Gyro Engine Gear goes from a fun gimmick part to one of the scariest stamina types on the game, ominously T-Posing over the competition as they flag and die.
This is due to the main spinning mass of the Beyblade, the EG "Weight Disk" part and CEW (upon which determination of whether the Beyblade is spinning or not is based - the AR and Engine Stopper Base are ignored) being isolated from opponents by the free spinning bearings, meaning they are unable to wear it down or steal spin from it (due to the outer shell having minimal momentum of its own), combined with its dual spin nature meaning it can opt for the marginally better match up dependent on the opponent it faces.
This does require the use of a small set of defensive Attack Rings, and in particular its properties can be further capitalised on with the use of free-spinning Sub-Rings such as Dragon Saucer and War Monkey SARs - though in an odd twist, War Lion's SAR tends to be too small to work while Dragon Breaker SAR gets its closest to Competitive relevance here by being mostly okay, if a little weak defensively to contend with more conservative choices.
As such, it is very challenging to outspin without very significant destabilisation and even that is hit and miss.
However, it is very susceptible to Knock-Outs, even Balance types such as Force Smash Combinations and some compacts have the ability to send it reeling potentially out of the stadium.
Overall, this "joke" part has suddenly found itself near the top of the competitive pile and the subject of a very lengthy ruling clarification section.