BIG SEVEN 80

 

UK Exclusive - Aluminium 650b hardtail with sophisticated TFS frame, RockShox Judy fork, 1 x 12 Shimano Deore drivetrain and hydraulic disc brakes.
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Our heartland has always been bombproof aluminium hardtails. Half a century of frame building experience counts for a lot.

The Big Nine and Big Seven 80 is a UK exclusive model pairing a Rock Shox Judy fork and Shimano Deore 1 x 12 groupset with our sophisticated TFS frame featuring the latest technology:

- full internal cable routing for a clean, neat set up,
-tapered headtube offering the potential for future upgrades
-inboard disc brake mounts protect the brake and maximise stopping power

There are a wide range of sizes; Big Nine for taller riders and Big Seven for shorter riders with a healthy overlap between the two.


For riders in the middle, riding style can be taken into account. If you are looking for speed and efficiency choose a Big Nine, if you are looking for agility chose a Big Seven.

  • 1 x 12 Shimano Deore drivetrain
  • RockShox Judy TK fork
  • Hydraulic disc brakes
  • Sophisticated aluminium frame
  • Tapered head tube
  • Internal cable routing
model year 2022
  • material: aluminium
  • 27.5x2.25" max. wheelsize
  • 135x9mm axle standard
  • BSA bottom bracket standard
  • MUK 5 Hanger
frame size XS, S
  • Coil
  • 100mm suspension travel Lockout
  • 42mm fork offset
  • 27.5x2.25" max. wheelsize
  • 17mm inner width
  • material: aluminium
  • 100x9mm width front hub
  • 32 spoke holes
  • Centerlock
  • 135x9mm width rear hub
  • 32 spoke holes
  • Centerlock
  • 30 teeth
  • 170 mm-XS/S, 175 mm-M/L
crank 170 mm-XS/S, 175 mm-M/L
bottom bracket Shimano Deore
  • 51-10 teeth
  • 12 Speed
chain KMC X10
rear derailleur Shimano Deore M6100SGS Shadow+
  • BR-MT200 brake caliper
headset Merida M2345
  • material: aluminium
  • 31.8mm diameter
  • 6° stem angle
  • 70 mm-XS/S, 80 mm-M, 90 mm-L
stem size 70 mm-XS/S, 80 mm-M, 90 mm-L
  • material: aluminium
  • 690mm width
  • 15mm rise
grip Merida EC
  • material: aluminium
  • 30.9mm diameter
  • 15mm setback
saddle MERIDA Sport comfort
pedal VP, VPE-891

weighed with 27.5" wheels and at frame size M, without pedals

Bike Frame Geometry Image
Frame Size XS S
Tyre Sizes 27.5" 27.5"
St Seat Tubes mm 340 380
Tt Top Tubes mm 550 570
Cs Chain Stays mm 430 430
HTA head tube angle [°] 69 69
STA seat tube angle [°] 73 73
Bd Bottom Bracket Drops mm 30 30
Ht Head Tube Lengths mm 100 115
Fl Fork Lengths mm 487 487
R Reach mm 378 394
S Stacks mm 563 577
Wb Wheel Base mm 1056 1078
Sh Stand Over Height mm 649 689

To reduce production and delivery times, we are sometimes forced to make last-minute specification changes. Please be aware that those changes might not be reflected on these product pages and images.

 

Technology

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X-TAPER HEADTUBE

Steering precision is vital to safe and confident handling, and the X-TAPER HEADTUBE allows us to significantly boost this precision. A larger headset diameter at the bottom paired with a smaller one at the top helps to deal with the strains modern riding and equipment can put on the headtube, all without adding unnecessary weight. It allows tapered forks to be fitted with ease and delivers precise and confidence-inspiring steering.

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SMOOTH WELDING

This is a process we use to give a nice flat finish to our welds instead of the scaled, 'stack of coins' effect TIG welded joints often have. The welder uses the welding torch to go over the joint twice, helping to smooth out the filler material. It takes a lot of skill to do this, but it delivers strong and smart-looking frames that have the appearance of a carbon fibre frame at first look.

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INTERNAL CABLE ROUTING

On the majority of our frames, we run the gear and brake cables and hoses through the frame. The cables enter and exit the frame through smooth sockets, or we use one of our other systems like SMART ENTRY or WIRE PORT to be routed through. Running the cables inside the frame protects them from the elements, gives a clean and neat look and can offer aerodynamic advantages.

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DOWN TUBE EXIT

DOWN TUBE EXIT is a feature seen on some of our frames with internally routed cables. By slightly overlapping the downtube where it connects to the bottom bracket, it leaves a small space that allows cables to exit easily. This means they are easily accessible for routine maintenance or replacement, but it prevents excessive movement and noise that can cause wear and distraction.

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RACELITE 61 ALUMINIUM

We use a minimum of 6061 grade aluminium on all our bikes. It’s particularly well suited to being shaped with our hydroforming and technoforming processes, which allow us to vary the wall thickness to create double-butted tubing and complex frame shapes. It’s also an alloy that welds easily, and once it has been carefully heat treated to maximise strength, it means we can create strong and lightweight bicycle frames for you to enjoy.

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TFS - TECHNO FORMING SYSTEM

Manipulating the tube shape and thickness greatly impacts the appearance, weight and functionality of our aluminium frames. One technology that allows us to do that is TECHNO FORMING, where plain aluminium tubes get mechanically formed by using an external form and an internal metal core. The result, beautifully shaped tubes with varying wall thickness, ready to be used to create our technoformed aluminium frames.

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F-MOUNT

Being able to turn your bike into an all-weather commuter that has mudguards and other fittings can be a real plus, in particular when riding on wet and perhaps muddy roads and tracks on a regular basis. To make fitting easy, some of our bikes are F-MOUNT equipped. These integrated fittings mounts make adding mudguards fast and simple. Please note that some bikes require model-specific mudguards.

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K-MOUNT

Integrated mount on the chainstay to fit a Merida kickstand (or any commercial kickstand).

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C-MOUNT

Similar to our F-MOUNT, where various fixing points for mudguards are part of the frame offering, the C-MOUNT equipped bikes have the fixing points for a rear rack already integrated, making fitting fast, simple and reliable. The C-MOUNTS are an additional feature that improves the day-to-day versatility by adding loading capacity to your bike, ideal for commuting and shopping trips. Please note that some bikes require model-specific rear racks.

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