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Calibre Bossnut Ladies Mountain Bike

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Retail Price £1,300.00

Colour: Black - White
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A superb ladies version of Calibre's award-winning full-suspension mountain bike, designed and built specifically for women - available exclusively at GO Outdoors.

MBR's Bike of the Year 2015 attracted praise from both newcomers and experienced riders alike, and building on this Calibre have produced the equally impressive Calibre Bossnut Ladies. Built around the original geometry, with the addition of women's specific components and suspension tuning, it still gives the same confidence-inspiring stability whilst being able to respond sharply to aggressive riding.

This full-suspension bike will help you conquer those rough, steeper terrains that a hardtail simply can't handle, giving you plenty of scope for future upgrading as your riding progresses.

It has a double-butted aluminium frame with a smooth-welded front triangle and a single pivot swing arm designed around 130mm travel platform, giving an ideal amount of suspension for all-round trail riding.

The RockShox Sektor Silver Solo Air fork and the Monarch R rear shock, now with a specific set up to offer plush air-sprung suspension with rebound adjustment, the front fork being lockout-equipped for efficient pedaling when suspension isn't required. The rear shock maintains traction over rough ground, giving you greater control of your bike and letting you power through terrain that would previously have you grabbing your brakes.

The full Shimano Deore 2x10 groupset includes a clutch-equipped Shadow+ rear mech for improved chain retention, rugged enough to take serious trail abuse whilst still providing precise, efficient performance. The Shimano hydraulic disc brakes, and their integrated I-spec lever design, bolts together with the gear levers for a tidy, easy-to-use cockpit. The crank lengths have been shortened to a women's appropriate length.

Deore hubs and tubeless-ready WTB ST i23 rims continue the upgrading theme, allowing you to make the move to tubeless tyres with a minimum of fuss. The WTB Vigilante sits on the front wheel to provide extra control and grip while cornering, while the Bee Line's lower tread keeps the rear wheel rolling fast.

Ritchey provide their famous high-quality aluminium components for the seatpost, stem and handlebars now with narrower grips for women's hands and women's specific bar widths. Upgraded for the female rider with WTB Speed She saddle for increased comfort.

Available in sizes 15, 17 and 19 (subject to stock availability) - Please check the info tab for geometry details


Frame: 6061 aircraft grade hydroformed alloy frame with smooth welded front triangle, tapered headtube and 130mm rear travel
Fork: Rock Shox Sektor Silver 130mm travel with tapered alloy steerer and 15mm bolt through maxle
No. of Gears: 20
Gear Details: Shimano Deore 10 speed
Gear Shifters: Shimano Deore 2 x 10 speed iSpec
Front Derailleur: Shimano Deore 2 x 10 speed
Rear Derailleur: Shimano Deore 10 speed Shadow Plus
Chainset: Shimano Deore 38x26T
Cassette: Shimano Deore 11-36T
Brakes - Type: Hydraulic Disc
Brakes - Details: Shimano M506 levers with M447 calipers, Shimano 180mm centre lock front rotor and Shimano 160mm centre lock
Brakes - Levers: Shimano M506 levers
Weight: 14.5kg
Rims: WTB ST i25 32H tubeless ready
Tyres: WTB Vigilante 2.3” front, WTB Bee Line 2.2” rear
Front Hub: Shimano Deore 15mm bolt through centre lock 32H
Rear Hub: Shimano Deore QR centre lock 32H
Stem: Ritchey 4 Axis
Saddle: WTB Speed She
Handlebar: Ritchey MTN Trail (740mm for 15.5" and 17.5", 760mm for 19.5") 20mm rise with 28mm diameter grips
Head Set: FSA Orbit tapered full sealed cartridge bearing
Pedals: Alloy platform pedal
Rear Shock: Rock shox Monarch R 190x51mm with lighter tune
Gender: Womens
Seatpost: Ritchey 2 bolt 30.9mm, 350mm


Bossnut Geometry  

 15.5" 17.5" 19.5"
Seat Tube  395mm 445mm 495mm
Effective Top Tube   572mm 585mm 607mm
BB Drop  18mm 18mm 18mm
Rear Centre  436mm 436mm 436mm
Seat Angle  73.5° 73.5° 73.5°
Head Angle  67°
67° 67°
Head Tube Length  110mm 115mm 125mm

Reviews (4)

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  • 5 out of 5
Fantastic bike- okay price, 09 April 2017
The Bossnut bike itself is a terrific mountain bike designed with a few women specific components. Really good design for entry full-suspension and a great price-unless you're shipping to the US. Go Outdoors doesn't include in the price a more than 15% shipping and duties price before you get it. Takes the bike from being a fantastic deal to just a good one.

  • 5 out of 5
Brilliant full suss MTB, 06 April 2017
By Gems (Cannock)
Amazing investment for my first full suspension MTB, my knowledge is not great on bikes but my husband who has 3 ridiculously expensive mountain bikes is slightly in love with this bike too! Definitely worth the investment if you are looking to upgrade from a hardtail like me or just looking for your first full suss MTB for a reasonable price.
I've been over my local MTB trail now 3 times and every time I come back more impressed and with more personal bests!

  • 5 out of 5
Calibre Bossnut Ladies, 05 December 2016
By Sharney (High Peak, Derbyshire.)
I really love this bike.
I'm fairly new to Mountain Biking - previously I've ridden hire bikes and borowed bikes, I'm so pleased to now own one of these bikes.

I have riden the Calibre Bossnut at Llandegla and Coed Y Brenin trail centres in North Wales plus a couple of other local trail centres.
I had so much fun and I'm now hooked!

I've had a lots of compliments about the Bossnut as it looks really nice.

A lot of thought has gone into the bossnut, the design and build quality is fantastic, you get a lot of bike for the price, it's great value for money .

I wouldn't hesitate to recommend.

  • 5 out of 5
Ladies Calibre Bossnut, 28 November 2016
By NicST955 (West Midlands)
I first saw a picture of the bike on the internet and the men's version had received lots of good press. I liked the look of it and when I picked it up, it definitely did not disappoint.

I did a lot of research comparing the spec to other similar bikes and for the money it is probably the best spec women's bike you can buy.

A few things worth noting are the rockshox sektor forks equipped with motion control damping which is new for this year. This gives much better damping and control. The rear derailleur also has a clutch switch which is useful for technical downhill trails. The rims also come equipped with tubeless rim tapes already in place.

The paint job is really distinctive yet under stated (not too much pink). The component colours have been tastefully matched giving it a high end look.

I rode it for the first time at the weekend and immediately felt at home on it. It felt smooth and controlled straight away. The gear change, brakes etc all worked great as you would expect for this level of components.

We did change a few items which are more suitable for me i.e: bars, seat and stem from my previous full suspension bike, but this is purely a personal choice and has no reflection on the original components.

Although it is early days, I really think this bike is going to help me to improve my riding and am confident that I made the right choice.

I have been riding for 3 years and mainly ride Trail Park Centre's at blue, red, and occasionally the odd black graded trail.



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