






Mantis PS 300 v4 'Challenge'
Description
Now in its 4th iteration, our most-popular tapered-beamed frame debuts a bold yet classic 'Challenge' design, featuring a sleek satin finish and high profile Mantis branding.
As the heaviest in our Mantis Performance Series (PS), this 300g racket is designed for committed amateurs seeking to generate maximum spin and clean power whilst maintaining playability. Engineered to minimise vibration whilst delivering incredible ball speed from an enlarged sweet-spot.
Specifications
Length: 27in / 68.58cm
Head Size: 100 in² / 645.16 cm²
Unstrung Weight: 10.6oz / 300g
Beam Width: 23.5mm / 25mm / 22.5mm
Balance: 12.8in / 32.51cm / 10 pts HL
Stiffness: 70
String Pattern: 16x19
Racket Technology
THERMOCORE FUSION™
An advanced resin-infusion process designed to enhance structural uniformity and performance consistency throughout the racquet frame. By subjecting a proprietary resin system to extreme thermal conditions—surpassing 200°C—the resin is brought to a true fusion state during the layup phase of production.
This high-temperature activation enables carbon fibres and resin to bond with exceptional uniformity, significantly reducing microscopic voids and inconsistencies typically found in conventional racquet manufacturing. The result is a near-seamless composite structure.
Key Performance Benefits:
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Frame-to-Frame Consistency
The ultra-even resin distribution leads to tighter production tolerances—meaning every racquet delivers reliably similar specs and feel. -
Enhanced Torsional Stability
With reduced internal variances, the frame responds with greater predictability, especially during off-centre impacts. -
Solid, Dampened Feel
ThermoCore Fusion™ minimizes unwanted vibration by producing a tighter matrix of carbon and resin—translating to a more muted, comfortable contact point. -
Improved Structural Integrity
A racquet crafted using ThermoCore Fusion™ is inherently more robust, with fewer internal stress points that could compromise durability over time. -
Consistency = Confidence
Whether in practice or under pressure, every swing benefits from a reassuringly uniform feel, empowering players with more control and comfort on every shot.
PRECISIONCRAFT™ CONSTRUCTION
Every MANTIS tennis racquet undergoes a meticulously controlled hand-crafted lay-up process, where precision and consistency are paramount. The carbon fibre sheets—engineered to strict specifications—are strategically aligned by hand to control stiffness, flex, and torsional stability in each frame. This artisan approach allows for exact fibre orientation, ensuring the racquet’s mechanical properties are precisely tailored to performance expectations. Unlike mass-automated production lines, the manual lay-up guarantees alignment integrity and minimises material distortion or fibre misplacement.
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Multi-directional carbon fibre placement for optimal strength-to-weight ratio
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Manual tension checks at critical stress zones (e.g., throat, hoop)
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Each lay-up individually inspected for fibre integrity and uniformity
Following the structural assembly, each frame enters a refined finishing and cosmetic application phase, where attention to detail distinguishes MANTIS racquets. Surface preparation is handled with extreme care to preserve aerodynamic shaping while ensuring flawless paint adherence. Finishing specialists apply cosmetics using custom templates and controlled layering techniques, delivering both performance coatings and aesthetic precision.
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Ultra-fine sanding and smoothing for aerodynamic integrity
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Controlled paint layering to maintain balance and feel
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Cosmetic decals hand-aligned to within ±0.25mm tolerance
This hands-on approach at every stage—from core structure to final finish—ensures that every MANTIS racquet upholds elite performance standards, with zero compromise on quality or individuality.

How to Choose Your Mantis Racket Grip Size
If you’re unsure, you can measure your grip size using a ruler or tape measure from the crease of your palm to the tip of your ring finger.
- Lay your hand flat with your fingers together and thumb relaxed.
- Line up a ruler with the bottom crease of your palm.
- Measure to the tip of your ring finger.
You can also check the grip size of your current racket by looking at the number on the bottom of the handle.
Choosing a Grip Size
If you're between sizes, choose the smaller size and add an overgrip to increase the grip size.
Effortless Customization at Your Fingertips
Tailor your Mantis racket to perfectly suit your unique playstyle. Select your preferred design, grip size, strings, string tension and weight for a personalized feel that enhances your game.

Challenge

Tour

Why Choose Mantis?
Mantis is dedicated to the "committed amateur"—players who love the game and strive to improve. Our gear is designed to elevate your play without the high-end price tag of professional-level sponsorships.

Mantis isn’t just another tennis brand—we’re backed by a team of industry experts.
Meet the Experts
- Designed by Martin, a world-class racket engineer
- Crafted in leading factories for precision
- Refined by creative designers for a sleek, performance-first aesthetic
- Hand-strung by our in-house stringing specialist for ultimate consistency
Frequently Asked Questions
What makes Mantis rackets different from other brands?
Mantis rackets are designed specifically for the "committed amateur," offering high-performance at an affordable price. Our rackets are handmade, ensuring precision and consistency, and come with customizable options for grip size, design, weight, and stringing to perfectly match your play style
How do I choose the right grip size?
Grip size is crucial for comfort and control. We offer three sizes to fit different hand sizes:
- Grip 2: Standard
- Grip 3: Medium
- Grip 4: Large
If you're unsure, it’s always best to try out rackets with different grip sizes in person, but if that's not possible, we recommend measuring the circumference of your hand and referring to a sizing guide.
How do the stringing options work?
We offer three stringing options:
- Recommended Stringing: Using our pre-selected Mantis strings and strung at a suitable tension for this racket.
- Customised Strings: Select from the full range of Mantis strings with customizable tensions.
- Unstrung: No extra cost.
All rackets are strung by Tom, our 'Master Stringer', in our UK facility
What is the lead time for custom stringing and weight options?
Custom stringing may add extra time to your delivery. Generally, stringing takes an additional 1-2 days to complete.
Recommended strings and unstrung options won't add any time to the delivery
Can I return or exchange my racket if I’m not satisfied?
We want you to love your Mantis racket! If you're not completely satisfied, you can return or exchange it within 30 days of purchase, provided it’s in unused condition. Please check our Return & Exchange Policy for more details.
What if I want to try the racket before buying it?
We offer a demo service where you can try out the racket before committing to a purchase. Pay a deposit, test the racket, and if it meets your expectations, you can purchase it or return it. Learn more about our Demo Service here.