The new Calibre Bossnut may have only just been released last month, but it's now got a massive £500 price cut in this Black Friday mountain bike deal. And that's not because there's anything wrong with the bike as it's a proper ripper.
Our ultra-experienced bike tester, Guy Kesteven, awarded it 4.5 out of 5 stars in his Calibre Bossnut 2025 review, saying: "The new Bossnut is an outstanding mix of sorted handling and geometry in a seriously tough frame that’s begging you to ride it flat out straight away. Add very durable, serviceable top brand components and it’s great long term as well as initial purchase price value too."
Buy the Calibre Bossnut 2025 for just £999 at Go Outdoors.
Our colleagues over on MBR were equally impressed and the Bossnut got a great reception from all corners of the MTB press. It was already one of the best budget mountain bikes at its full £1499 price, but at £999 in this deal, nothing else comes anywhere near close.
Given a budget of £1000, I'd only usually recommend hardtail mountain bikes at that price. But with this deal taking the Bossnut to £999, if you're in the market for a sorted trail MTB that doesn't cut any spec corners, it's definitely the bike to choose. Nothing else can touch it in terms of value.
Component highlights include a RockShox suspension pairing of a 140mm Recon Silver RL fork up front and RockShox Deluxe Select shock with 135mm of rear travel at the rear. Brakes and gears are from Shimano, with a 1x11 Cues drivetrain and 180mm brake rotors.
Also included is an X-Fusion Manic dropper post complete with an adjustable alloy underbar remote lever and size-specific (125mm XS + S, 150mm M, 170mm L + XL) stroke lengths.
The Bossnut has bolt-through axles and Boost width hubs front and rear. It comes with 29in wheels as standard but can be converted to a mullet with an aftermarket kit from Calibre. Bike sizing runs from XS to XL, the large-sized test bike tested by Guy weighed in at 16.4kg. For full bike specs, see the list below.
To buy the Bossnut for £999, you'll also need to get a Go Outdoors discount card for a fiver. This deal runs out on 2nd December when Go Outdoors says the Bossnut will return to its usual £1499 price.
Tech specs: Calibre Bossnut 2025
- Discipline: Trail, Enduro
- Head angle: 64.5º
- Frame material: 6061 butted alloy
- Fork: RockShox Recon Silver RL 140mm travel
- Shock: RockShox Deluxe Select 135mm travel
- Size: XS, S, M, L (tested) XL
- Weight: 16.4kg (size large)
- Wheel size: 29in
- Chainset: Shimano Cues 32T, 170mm crank length bottom bracket.
- Rear mech: Shimano CUES 1x10
- Shifter: Shimano CUES 1x10
- Cassette: Shimano CUES LG300 11-48T 10-speed
- Brakes: Shimano BR-MT401 2-piston hydraulic disc brakes with 180 rotors
- Tires: Maxxis Minion DHF EXO wired 29x2.5in front and Maxxis Forekaster EXO wired 29x2.4in
- Wheels: 30mm internal tubeless rims on Shimano TC500 Centerlock hubs
- Bars: Alloy low rise 31.8 x 780mm
- Stem: Forged alloy 31.8 x 45mm
- Grips: Calibre ribbed lock on
- Seat post: X-Fusion Manic LC 170mm dropper
- Saddle: Calibre Trail
