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Calibre Triple B Mountain Bike

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Retail Price £1,600.00SAVE12%

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Bossnut's Big Brother has arrived, and he's fast, fun and so responsive to every twist and turn.

Calibre's Triple B truly is the big brother of the Bossnut family, combining everything great about these award-winning, trail-smashing bikes with a host of upgrades that all the magazines and riders were crying out for.

It uses the same superb frame geometry from the Calibre Bossnut Evo, with the addition of a 142x12mm bolt through rear end and the longer and more capable Rock Shox Reba RL forks, making for a much more aggressive bike.

SRAM's NX 1x11NX gearing ensures responsive and simple shifting with a huge gear ratio for even the toughest climbs, while the SRAM Guide T brakes give you superb stopping power when you need it most.

The WTB ST rims now have an increased internal width of 29mm, giving greater strength but also a much better tyre profile which also offers more compliance, and the Vigilante front tyre is now paired with the WTB Trail Boss tyre for greater grip.

You also have the new Kore Durox 780mm handlebar with its 5 degree up and 8.5 degree back sweep, and the confidence boosting Tranz-X 125mm dropper that comes as standard.

For those who want to move to a stealth dropper, the frame now contains both external and internal post routing, letting you choose whichever suits your style.

  • 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: 27.5"
Frame: 6061 aircraft grade hydroformed alloy frame with tapered headtube and forged one piece rocker link - 130mm rear travel. Stealth and external dropper routing. 142 x 12mm bolt through rear axle
Fork: Rock Shox Reba RL 140mm travel with tapered alloy steerer and 15mm bolt through maxle stealth
Gear Details: SRAM NX 1x11
Gear Shifters: SRAM NX
Rear Derailleur: SRAM NX 1 x 11 speed
Chainset: Samox trail with 32T narrow wide ring
Brakes - Type: Hydraulic Disc
Brakes - Details: SRAM Guide T brakes with 180mm front and 160mm rear rotors
Rims: WTB ST i29 32H tubeless ready
Tyres: WTB Vigilante 2.3" front and WTB Trail Boss 2.25" rear
Front Hub: Formula 15mm bolt through 32H
Rear Hub: Shimano MT500 142mm
Stem: Calibre Trail 45mm
Saddle: Calibre Triple B
Handlebar: Kore Durox 780mm width 20mm rise
Head Set: FSA Orbit tapered No. 57E
Pedals: Alloy platform pedal
Gender: Mens
Rear Shock: Rock shox Monarch R 190x51mm
Recommended Use: Cycling, Weekend
Additional Features: Basket
Cassette/Freewheel: SRAM PG1130 11-42
Seatpost: Tranz X 125mm drop
Speed: 11
Weight (kg): 14.5


Triple B 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 Triple B Mountain Bike
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