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The Calibre Rail is a big-wheeled bike that performs like a proper modern mountain bike should, at a very accessible price. The combination of its steep seat angle and slacker head angle creates a great climber and a confident hill bomber; it's a composed ride that's great for anyone starting out. Suspension on this hardtail is taken care of by a fuss-free, coil-sprung Suntour XCM fork with100mm of travel._The Rail's Shimano drivetrain works well with the handsome tan-walled OBR tyres to create speed and keep you in control. Its Clarks M2 hydraulic brakes provide ample stopping power in all conditions. Altogether, this bike is far more capable than its price tag suggests -it's a budget all-rounder and a team favourite._Feature Highlights_Calibre hardtail frame - A lightweight alloy frame with balanced geometry for efficient climbs and confident descents100mm Suntour XCM suspension fork - A burly coil-sprung suspension fork that needs minimal maintenanceClarks M2 hydraulic disc brakes - Smooth and responsive brakes that represent awesome valueShimano Acera/AlivioDrivetrain - An entry-level drivetrain from market leaders ShimanoOBR Mike Bear tyres - Grippy, soft-compound tyres that shed mud and roll fastAbout Calibre_Calibre Bikes have a simple ethos: to build high-quality road and mountain bikes, that are affordable and fun to ride. Thoughtful and innovative design, with great attention paid to geometry and spec, makes Calibre an award-winning brand that leads the pack._Frame: Alu 6061 29”, 135 QR, Post-mount disc, 44mm headtubeFork: SR Suntour SF15 XCM forks with 100mm of travelHandlebar: Calibre Trail, Alloy 780mm wide, 20mm upsweep, 6°backsweep, 31.8mm clampStem: Calibre Trail, 31.8mm clamp, 45mm extensionGrips: Calibre Trail, Single lock-on, soft compound, integrated bar endHeadset: Semi-integrated, ZS44Saddle: Calibre Trail, steel railsSeatpost: Calibre Trail 30.9 x 350mmSeatclamp: Calibre QR 34.9MMChainset: Calibre 175mm 22x36TPedals: Flat pedalsBottom Bracket: Square taper 73mm BBDrivetrain: Shimano 18 speedCassette: Shimano 9 speed Acera 11-34TChain: KMC X9Shifter Right: Shimano Alivio 9 speed for 2x9Shifter Left: Shimano Alivio 2 speed for 2x9Rear Derailleur: ShimanoAlivio 9 speed direct mountFront Derailleur: Shimano Dual pull 34.9 - 31.8 / 36-14TTyres: Obor Mike Bear 29” x 2.25” Tan wallRims: 29”, 25mm wide, 32h, alu double wallFront Hub: Shun Feng, SF-A217F, Alu, black, 36h, 6 bolt disc, 100mm QRRear Hub: Shun Feng, SF- A217R, Alu, black, 36h, 6 bolt disc, 135 QRFront Brake: Clarks M2 Hydraulic discRear Brake: Clarks M2 Hydraulic discFront Rotor: Clarks Wavey 180mmRear Rotor: Clarks Wavey 160mm_Please note: some minor specification changes may occur without notice. Any changes will use equivalent or higher quality parts._Building your bike: Bikes purchased online are delivered boxed and will require assembly before they can be used. View the GO Outdoors Bike Assembly guide for more info, including step-by-step and video instruction guides._We are happy to assemble your bike for FREE at any GO Outdoors store with a bike servicing department (this excludes all GO Express stores, and selected other GO locations). Please call ahead to confirm that you would like us to build your bikeYou can find store details and phone numbers here. Every bike sold also comes with FREE 6 week safety check_Can't get to a GO store? Our partners at LeisureLakes bikes will also assemble and inspect any new bikes purchased from our website. You can book a LeisureLakes appointment here_Warranty and Returns info: Unfortunately, we are not able to process faulty or warranty bike returns through our warehouse. If your bike develops a fault please contact your nearest GO Outdoors store with a bike servicing department where they will be able to help you. Please call to discuss and book an appointment before you go to store. You can find store details and phone numbers here