Effetto Mariposa Giustaforza II 2-16 Torque Wrench

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Product Description

The home-mechanic’s dream tool, the Giustaforza II has a smaller, non-ratcheting head than the Pro, to operate in tight spaces. The DELUXE version is completed with cycling-specific bits and comes into a practical wrap package.

Capacity from 2 up to 16 Nm: 

This is the best torque range for precision bicycle applications and ‘sensitive’ components. In use, always refer to the torque values specified on technical documents or printed on the parts themselves.

Easy to use:
Set the desired torque rotating the wrench end knob, reading the torque value on the scale (scale resolution is 0,5 Nm, integers on one side, 0,5 on the other). Insert the appropriate bit (depending on the bolt you need to tighten). When using the tool, a loud ‘CLICK’ and a 3° free-movement tells when the torque has been reached. Always take the wrench to minimum torque value after use.

Minimal fixed head:
Giustaforza’s simple, ‘non-ratcheting’ head has been chosen on purpose on this version, to facilitate the tightening of bolts where space is very limited (like seatpost bolts parallel to the seatpost shaft in zero offset models). The head is now smaller than ever, to maximise this advantage.

The light aluminium body keeps the weight down to a record-breaking sub-180g value, less than half the weight of other torque wrenches in this range of torque. This is paramount to get the right feedback at low torque values, without mistaking the effort to hold the tool with the applied torque.

A state-of-the art tool, built to last:
Functional, linear in design and precise in any detail: shouldn’t be a surprise to know that Giustaforza II 2-16 has been conceived and produced in Italy. The tool is hard-anodized with laser-etched inscriptions, and it’s built to last. The mechanical, click-type functioning make the wrench extremely shock tolerant and the absence of batteries or electronics further increase its reliability. Each sample is checked and numbered as a single masterpiece.

Controlled torque:
The DELUXE version is equipped with a bicycle-specific bit set:
bits include a 100 mm-long extension, three 100 mm-long bits (hex 4, hex 5 e T25) plus several other Torx and hex bits in standard length (25 mm). That covers all the needs of newest Shimano, Sram and Campagnolo high-end groupsets, plus those of reversed-bolt stems.
All bits are manufactured from S2 special steel, with very high (62 Hrc) surface hardness, to ensure maximum durability.

Detail of bits:
10x25mm (HEX2, HEX2.5, HEX3, HEX6, T10, T15, T20, T30, -3/16, +PH1)
3x100mm (HEX4, HEX5, T25)
1x100mm (extension)

Occasionally, without notice, manufacturers change product design and/or specifications.

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Home & Workshop Tools Guide


Home & Workshop Tools

Every cyclist needs tools, even if it is just a few Allen keys a chain tool and some tyre levers for general maintenance, it pays to have good quality tools available to you when needed.

The value of high-quality tools is second to none, the best will last you a lifetime and the worst will only give headaches. With so many standards, sizes and types of expensive bike components out there, it makes sense to care for those parts with high-quality dedicated bicycle tools.

Drivetrain tools

Bottom bracket tools

The bottom bracket houses the bearings and sometimes spindle allowing the cranks to spin freely. There are many different types in many different sizes to suit all of the bike and crank combinations available. To remove and fit a new bottom bracket a tool that is specific to that bottom bracket will be needed.


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bottom bracket tool

Cassette and freewheel tools

If the bike uses a screw-on freewheel, there are many different types available, each type needs it's own freewheel removal/install tool for that particular freewheel type. Cassette users will need a cassette tool to fit the lockring. Both freewheel and cassette removal/installation will also require a chain whip to fit/remove.


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Chain whip

Chain tools

When fitting a new chain, a chain tool is used to drive the pin out of the link to shorten or remove the old chain. Most modern chains will use a quick-link, to remove these there are dedicated, quick-link pliers. You might also wish to check your chain for wear, there are chain wear indicators that measure the stretch for you.


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Chain tool

Crank pullers

Some models of crank and bottom bracket use a type where the spindle is part of the bottom bracket. To remove this crank from the spindle you will need a crank puller. One part threads into the crank arm, then the back part of the tool screws though the front pushing against the spindle to remove the crank. There are a few sizes available, so please measure before purchase.


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Crank puller

Pedal tools

A good quality pedal spanner with a long handle will last a lifetime and is a sound investment. There are also various pedal servicing parts to remove and install the necessary bearings and bushings that keep your pedals spinning freely. For those with workshop experience, there are also pedal thread tapping tools to cut new thread in crank arms.


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pedal spanner

Wheel and brake tools

Cone spanners

The hubs on some wheels do not use sealed cartridge bearings, but instead, use traditional cup and cone bearings. To adjust the cone nut a spanner must be used, the spanner needs to be very thin to fit, much thinner than a regular spanner. These dedicated spanners are called cone spanners or cone wrenches.


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cone spanners

Wheel and tyre tools

The humble tyre lever is an essential part of any cyclists toolbox, but they come in many different shapes and sizes. Very tough mountain bike tyres might need a long and sturdy tyre lever to fit, while others are small and can fit in a saddlebag for emergency use. There are also spoke keys and valve tools, along with parts and tools used for wheel building and truing.


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tyre levers

Brake tools

Disc brakes depend on the rotor being straight and not being too worn to provide a good surface, there are tools to straighten the rotor and check for wear. There are also tools for the maintenance of brake levers and callipers. If using hydraulic brakes then the hose will need to be cut with a dedicated hose cutter.


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brake tools

Workshop tools

Alignment tools

For workshops or capable home mechanics, there is a range of alignment tools used to make sure the frame and fork of a bike are running straight and true. These specialised and dedicated tools are highly accurate and are vital to the job, allowing the bike to function as intended.


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Alignment tools

Facing tools

Certain areas of a raw bicycle frame can come out of manufacture or painting with slightly less than perfect internal diameters. Areas like the head tube and bottom bracket shell need to be perfectly circular to give the bearings and cups a perfect interface. This process is known as facing, there is a range of facing tools available for different sizes and applications.


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Facing tools

Headset and fork tools

When fitting new forks for a threadless headset, the steerer will need to be cut, a crown race fitted and a star nut inserted, there are dedicated tools for each of these jobs. There are dedicated tools for other types of fork and headset. There are also tools for headset maintenance, fitting and removal of cups and bearings, covering all the sizes and types available.


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headset and fork tools

Home mechanics

Allen keys

Allen keys are an essential tool for cyclists. Often the majority of maintenance and adjustment can be made with only Allen keys and a T25 Torx key. There are short sets available, or larger T-handle sets for working at home. As with any tool, it pays to get high quality. Maintenance is easier with high-quality tools, and for one that is used so often, you should treat yourself with good Allen keys and Torx keys.


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Allen keys

Cable cutters

When cutting brake or gear cables it is essential to get a clean cut first time, every time. If the cut is bad, or a second attempt is needed then the end will fray often meaning a ferrule cannot be added and in time the cable will unravel. With a good pair of snips, the ferrule can be added and the cable will last longer before needing to be replaced.


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cable cutters


Just like Allen keys, Torx keys and cable cutters, a good quality screwdriver set will mean fewer headaches in the long run. A range of different sizes for both Phillips and flathead types will fit the screw precisely and mean less rounded heads. Using the right tool for the job is as important as having the right tool in the first place.


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A good range of tight-fitting, high-quality spanners is an evergreen part of any good toolbox. A well-fitting spanner will mean less rounded bolts and happier home maintenance. Adjustable spanners are also available for those one-off jobs.


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Tool kits

Some of the big brands in the world of bike tooling now produce a toolbox packed with all of the essential high-quality tools needed for good maintenance. A bicycle tool kit is the best choice if you do not have any tools already, enabling you to work on your bike with the right tool for the job.


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Tool kit

Torque wrenches

There are many parts of a bicycle where the bolt must be tightened to a specific value. This value is measured in Newton-Meters and is a measurement of torque. These torque settings are both safety and functionally critical. To tighten a bolt to the required torque a torque wrench is needed. Once set to the value required, it will click to indicate not to tighten any further.


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Torque wrench


While not completely essential, all work done on a bike is much easier with a work stand. Elevating the bike to a comfortable secure position means you can work better and more efficiently on your bike. Giving access to both sides and being able to spin through the gears easily makes every job easier, faster and more accurate.


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How do I apply for finance?

At Tredz, you can spread the cost of your purchase and pay monthly over 6-48 months, interest free (dependent on repayment terms and amount). Finance is provided by Barclays Partner Finance and PayPal Credit with 0% APR finance available on purchases over £250 for Barclays Partner Finance and from £99 for PayPal Credit. Eligibility criteria apply.

1Fill your basket with everything you want from Tredz and go to the checkout.

2During checkout, select the finance option you want as your method of payment.

3You will be sent to our finance provider's secure server to complete your application.

4Finance providers PayPal & Barclays will use the information provided to make a decision and complete checkout if you are approved.

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Barclays Representative Example: If total purchase price is £1,399.00 and your selected term is 36 months 11.9% APR Representative, Annual Interest Rate 11.9% Fixed, you would pay £46.00 per month. Total amount payable will be £1655.83 with a cost of credit of £256.83. Finance is subject to application, financial circumstances and borrowing history. Performance Cycling Limited acts as a credit broker and not the lender, Barclays Partner Finance acts as the lender. Barclays Partner Finance is a trading name of Clydesdale Financial Services Limited, a member of the Barclays group. Clydesdale Financial Services Limited is authorised and regulated by the Financial Conduct Authority (Financial Services Register number: 311753). Registered in England. Registered No: 2901725. Registered Office: 1 Churchill Place, London E14 5HP.
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We will give you a full refund on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.

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