Source: Shark

Boost Junior 21 mm 2026 Shark

Name: Shark Boost Junior 21 mm 2026
Brand: Shark
SKU: 01M3ZBKQJ7KW4Z12Q797EAY8CG

Beach Tennis· Boost

RR ScoreUpdated on 10/03/2026

Version · 8 optionsBoost Junior 21 mm 2026Change

The Boost Junior is the youth version of the Boost, for players aged 9 to 12 who already hit the ball well and want to improve. It is made of fiberglass with EVA Soft Pro, which makes the hit comfortable while also giving good ball exit. It is 48 cm, has a 21 mm profile and weighs 310 g (±5 g), with an even balance. The micro-granule paint helps generate spin, and the racket comes with a cover for protection and transport.

Key specs

Full specs

Weight: 310 g
Face material: Fiberglass
Thickness: 21 mm
Length: 48 cm
Balance point: Even balance
Core: EVA Soft Pro

LevelsBeginner

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Strengths and watch-outs

Pros

Youth size of 48 cm, for ages 9 to 12 according to the brand
310 g weight tends to make handling easier for young players
EVA Soft Pro core usually makes the hit softer
Micro-granule paint tends to make spin easier

Cons

48 cm length can become too short when the player grows
Fiberglass tends to generate less power on hard shots

Ideal for: Children aged 9 to 12 who already play and need a smaller, light racket
Levels: Beginner

Specs

Dimensions
Weight	310 g±5 g	Medium confidence
Length	48 cm	Medium confidence
Thickness	21 mm	Medium confidence
Balance point	Even balance	Medium confidence

Construction
Face material	Fiberglass	Medium confidence
Core	EVA Soft Pro	Medium confidence
EVA type	Soft	Medium confidence
Holes	No data	Medium confidence
Texture	Rough	Medium confidence

Profile
Level	Beginner	Medium confidence

How the RR Score was calculated

Criterion	Weight	Score
Specs	65%	69
Approval from players	35%	65

The RR Score is not yet a precise figure. It summarizes the data we have today (specs and reviews) and changes as more information comes in. A low score does not mean the racquet is bad and does not reflect its technical quality: often it is just missing data or reviews. The specs combine several sources and may have discrepancies: check the manufacturer's website and the store where you buy.

Kids/junior racquet: the RR Score for this category goes up to 60. It may be great for what it is designed for, but it does not rank among the best in the sport.