MY25 Sunn Radical Finest
The legend returns.
The Radical + — the bike that redefined what downhill meant in the 90s — ruled the slopes and put SUNN on the map as one of the most iconic names in mountain biking history.
Now, it’s back — meaner, faster, and hungrier than ever. The new RADICAL is reborn in a full-throttle Enduro version. It carries the same fearless DNA, blending downhill power with next-level agility. Built to shred trails, crush podiums, and leave everything else in the dust.
Ready to get radical?
⚙️ Specifications
🧱 Frame
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Frame: Full Carbon Toray Enduro Boost, Integrated, 160 mm
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Fork: FOX 38 Float Factory Kashima, 170 mm, Boost, Tapered
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Travel: 170 / 160 mm
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Shock Absorber: FOX Float X2 Factory Kashima Trunnion 205 × 60 mm
🚴 Transmission
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Rear Derailleur: SRAM GX Eagle Lunar 12-Speed AR
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Crankset: GX Eagle Boost 165 mm / 32T
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Cassette: SRAM Eagle XG1275 12-Speed, 10–52 XD
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Controller: SRAM GX Eagle 12-Speed
🛑 Brakes
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Brakes: Formula Cura 4 — 220 / 203 mm rotors
🛞 Wheels
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Wheel Size: 29"
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Rims: DT Swiss E1900 Spline Tubeless
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Hubs: Boost, Thru Axle
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Tires: Michelin Wild Enduro MS Racing Line 29 × 2.40 TLR
🧩 Components
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Handlebar: Brute One Alloy 780 mm × 31.8 — Rise 25
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Stem: 3D Forged Alloy, Integrated 31.8 × 45 mm
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Seatpost: Brute Dropper — 130 mm (S) / 150 mm (M) / 170 mm (L–XL)
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Saddle: Fizik Terra Aidon X5
⚖️ Weight
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Total Weight: 15.8 kg
📐 Geometry
| Specification | S | M | L |
|---|---|---|---|
| Seat Tube Height (ST) | 360 | 410 | 460 |
| Top Tube Length (TT) | 574 | 601 | 629 |
| Wheelbase (WB) | 1221 | 1250 | 1280 |
| Head Angle (HA) | 64° | 64° | 64° |
| Seat Tube Angle (SA) | 77.5° | 77.5° | 77.5° |
| Chainstay Length (RC) | 445 | 445 | 445 |
| Bottom Bracket Height (BB) | -28 | -28 | -28 |
| Head Tube Length (HT) | 100 | 110 | 120 |
| Reach | 435 | 460 | 485 |
| Stack | 628 | 637 | 646 |
📏 Size Guide
| Rider Height | Recommended Size | Fit |
|---|---|---|
| 158 cm - 170cm | Size S | 100 % |
| 168 cm - 180cm | Size M | 100 % |
| 178 cm - 188cm | Size L | 100 % |
- Regular price
- $10,410.00
- Sale price
- $10,410.00
- Regular price
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The development team worked tirelessly to create this machine as radical as it is versatile. A unique suspension was developed around the famous single-pivot plus rocker arm system that made the Radical legendary.
Construction.
The Radical features an all-new full carbon frame — engineered with precision to deliver the perfect balance between stiffness and flexibility. Our design team selected the finest Toray carbon fibres to achieve uncompromising control and responsiveness. The result is a frame that combines exceptional stability with agility, allowing you to stay in control no matter how rough the terrain gets.
Geometry.
A radical geometry means going straight to the essence of what makes a great enduro bike. Every dimension has been fine-tuned to the millimetre:
• A 64° head angle and long reach (435/460/485 mm depending on size) ensure high-speed stability and confidence on steep descents.
• A 77.5° seat tube angle provides an efficient pedalling position for technical climbs and quick acceleration.
• The low bottom bracket height (345 mm) improves stability in fast sections.
• 445 mm chainstays offer the perfect balance between traction and cornering precision.
Together, these elements give the Radical an ultra-stable, planted ride with just the right amount of liveliness when you push it.
Suspension.
The Radical uses a high-pivot single-link suspension system with a rocker linkage — a proven setup that has built its legendary reputation over the years. On the trail, the suspension feels incredibly predictable and quiet, absorbing hits with ease and letting you carry more speed through rough terrain. It remains composed and efficient at high speed yet surprisingly dynamic and playful for a bike of its travel and category.
Be Radical.
