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Calibre Beastnut Mountain Bike

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Retail Price £1,500.00

Colour: Yellow
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A strictly limited edition version of our award winning mountain bike, with all the upgrades you'll need to unleash your inner beast!

Calibre bikes offer well thought out geometry and unrivalled spec for the money, and leading the charge has been the Bossnut. This bike has won everything from WMB group test and MBUK 5/5 to MBR’s Bike of the Year, it truly has changed the market for what a sub £1,000 full sus bike can be.

To celebrate the efforts of the team we have created the Calibre Beastnut, a special limited edition version with all the upgrades that we would choose for a straight out the box trail smashing bike.

For 2017 we challenged ourselves to improve on what is already an incredibly fun and capable bike, and with our team of passionate riders and the glorious Peak District as our testing ground the improvements are outstanding.

  • Increased the effective top tube length whilst decreasing the length of the stem, giving a more controlled and confident ride
  • Development of a one piece rocker link to stiffen the suspension laterally
  • Increased tyre clearance for up to a 2.35” tyre

Built with the same new frame as its award-winning predecessor, the Calibre Beastnut is truly limited to just 250pcs, with each bike being uniquely numbered on the blanking plate.

It has an upgraded 140mm Rock Shox Revelation RL fork that slackens the head angle out a little more so you can tackle steeper terrain with more ease, while the up rated damper system also helps with rider control and tuning.

The 1x11 SRAM NX drive chain with a narrow-wide 32T chaining gives a much simpler cockpit with all the gear ratios you'll need, and the SRAM Guide RE brakes will bring you superb stopping power when you need it most.

WTB's Vigilante remains on the front, but the rear tyre has been switched out for the new WTB Ranger 2.25” to give more control and increased grip in mixed conditions.

To round the whole package off, a confidence boosting Tranz-X 120mm dropper post has been added and it's been given a truly awesome paint job that's certain to turn heads.

Available in sizes 17.5" (M), 19.5" (L) and 21.5"(XL) (subject to stock availability) - Please check the info tab for geometry details


Wheel Size: 650B
Frame: 6061 aircraft grade hydroformed alloy frame with tapered headtube and forged one piece rocker link - 130mm rear travel
Fork: Rock Shox Revelation RL Solo Air 140mm travel with tapered alloy steerer and 15mm bolt through maxle
No. of Gears: 11
Gear Details: SRAM NX 1x11
Gear Shifters: SRAM NX
Front Derailleur: Beastnut limited edition blanking plate
Rear Derailleur: SRAM NX
Chainset: Samox trail with 32T narrow wide ring
Cassette: SRAM PG1130 11-42
Chainrings: SRAM PC1110
Brakes - Type: Hydraulic Disc
Brakes - Details: SRAM Guide 180 front and 160 rear rotor
Brakes - Levers: SRAM Guide
Rims: WTB ST i23 32H tubeless ready
Tyres: WTB Vigilante 2.3” front, WTB Ranger 2.25” rear
Front Hub: Formula 15mm bolt through 32H
Rear Hub: Formula 32H
Stem: Calibre trail (45mm for 17.5"and 19.5", 60mm for 21.5")
Saddle: WTB Volt Sport
Handlebar: Ritchey MTN Trail 760mm width, 20mm rise
Head Set: FSA Orbit tapered No. 57E
Pedals: Alloy platform pedal
Rear Shock: Rock shox Monarch R 190x51mm
Gender: Mens
Seatpost: Tranz X Dropper – 120mm drop


Beastnut Geometry
17.5" (M)
19.5" (L)
21.5" (XL)
Seat Tube 445mm 495mm 546mm
Effective Top Tube  601mm 622mm 640mm
BB Drop 18mm 18mm 18mm
Rear Centre 436mm 436mm 436mm
Seat Angle 73.5° 73.5° 73.5°
Head Angle 65.8° 65.8° 65.8°
Head Tube Length 115mm 125mm 135mm
Reach 429mm 446mm 463mm


Calibre Beastnut Mountain Bike
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