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Heat Fly Evaluation Review

¥16,280(including tax)
  • Evolved introductory model
    Upper model with lace + belt configuration
  • Compatible with take-off from both feet
    Unlike higher models, this spike is compatible with take-off from both feet
  • Training spikes
    Low burden on the feet, allowing for long-term use
  • Usable on both dirt and grass
    Other spikes are exclusively for all-weather
Spike Name
Heat Fly
Price
16,280 (including tax)
Weight
300g (26.0cm one foot)
Applicable events
High jump, javelin throw
Compatible environment
Turf compatible
Spike Pins
12mm×11
Shoelace type
With laces, with strap
Upper Material
Synthetic fiber
Sole Material
Synthetic sole
Size
22cm ~ 30cm
Competition level
beginner
Recommended for such people
- Recommended for those still undecided about their specialized event (high jump or javelin throw)  
- Recommended for beginners who have not yet decided which foot to use for takeoff  
Unlike other high jump spikes, this model can accommodate either foot for takeoff.  
Therefore, it is suitable for beginners who have just started and have not yet decided which foot to use for takeoff.

Features

An introductory model yet has the same upper configuration as the higher models.

The material is synthetic fiber with very little mesh, resulting in relatively poor breathability.  
The upper is a type that tightens with laces and a belt. The belt is an ankle belt commonly seen in high jump spikes and is of standard thickness.  

The laces are designed to be attached slightly towards the toe compared to other spikes,  
allowing for more areas to be tightened with the laces than other spikes, enabling fine adjustments for those who may feel the toe area is narrow or wide, thus achieving a better fit.  

Moreover, the Dynawrap technology connecting the outsole to the shoelace area enhances the fit from the midfoot, allowing for stable jumps and throws.
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Slightly tight width

The width results show that overseas manufacturers like NIKE and ADIDAS have wider spikes compared to domestic manufacturers in high jump / javelin throw spikes.  
Width: Overseas manufacturers > Domestic manufacturers  
Among domestic manufacturers, it has the second widest width after ASICS' High Jump PRO.  
Additionally, since it is a model that can accommodate takeoff from either foot, the design is symmetrical.
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Sole hardness that supports beginners

It has a typical configuration for high jump spikes, with 11 pins (7 in the front, 4 in the back), and comes with dirt pins.  
The all-weather parallel pins are sold separately and are not included.  
The outsole is made of synthetic material, providing support during takeoff.  
Compared to the previous model, Japan Arch, the sole has been significantly hardened to achieve better rebound.  
It is slightly softer than ASICS' High Jump PRO and High Jump PRO 2, and somewhat harder than MIZUNO's Field Geo HJ.  
The sole hardness is almost the same as that of NIKE High Jump Elite and ADIDAS Adizero HJ.  
Since it is a model that is not restricted by the left or right foot for takeoff, the sole is flat.
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Slightly arched sole for a high jump spike

Compared to other competition spikes, it has less curvature. This characteristic of having less curvature is also common among other high jump spikes.  
The curvature of the sole roughly ranks as follows compared to other manufacturers:  

NIKE High Jump Elite > Tiger Paw JAPAN ARCH > Heat Fly > Other ASICS > MIZUNO > ADIDAS
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