Posted in Cycle

Our first piece of advice, when looking at the fit and feel of cycling shoes, is that you should buy shoes that fit well - straight out of the box.

Cycling shoes don't "break-in" like leather shoes do, this is because they are made from a solid mould and have a rigid (normally carbon fibre or composite) sole. The result, is that having a poorly fitting shoe from the outset, will cause prolonged discomfort and potentially injury; so it's worth getting it right!

Sidi cycling shoes are some the most bespoke and best designed shoes available today; and if you get a pair that fit correctly, then you will experience a superb level of comfort and performance.

Why is size important?

Sidi Cycling Shoes are well known for having a comfortable fit - straight out of the box.

Read our staff review of the Sidi Dragon SRS Carbon MTB shoes as a great testament. 

Any discomfort you experience, is most likely linked to choosing a shoe that isn't the correct size or shape for your foot. If you experience discomfort, then the best option is to return them for an alternative size.


Different people like shoes to fit in different ways; some like the shoes to be tight, however the majority of riders like approximately 5mm of movement in the toe box.

Cycling shoes are designed to be close fitting, and feel almost like a "second skin". The thinking behind this, is the same reason as cycling shoes have stiff soles - you are looking to maximise the power transfer between your foot and the pedal.

The optimum fit test:

  • Put on your cycling shoes, and stand upright in them; then try to lift your heels up. If there is any gap between the heel and the back of your ankle, then the shoes are too large, and they'll feel sloppy when you are riding. Many Sidi cycling shoes have a patented heel retention system, to minimise the gap between foot and shoe; providing a truly optimum fit.
  • In contrast, if your toes touch the end of the shoe when you are stood upright, then the cycling shoe is more than likely too small. Again, this depends on preference; but the majority of cyclists like a small amount of room in the toe box. You are looking for enough room to wiggle your toes a bit, but not for you to feel unsupported within the shoe.

The Sidi Wire Carbon Road Shoe is one of our best selling Sidi road cycling shoes, and features the patented Heel Retention device.



Sidi shoes size chart at Wiggle

The Wiggle Sidi size chart can be viewed on every Sidi shoe product page. It has been designed to help you make the right decision when you choose your new Sidi shoes.

When trying on your shoes, do this with the socks you would wear whilst riding. Thicker or thinner socks will not give you the realistic on-the-bike feel and touch that you require.

Top Tip: Don't listen to sizing rumours - It is important to remember that Sidi cycling shoes sizes are not smaller than the competition; this is something that has been rumoured over the years. The truth, is they are simply more precisely made.

Sidi's design is focused on providing cyclists with shoes that do not move once they are on your feet.

Sidi full sizes are 6mm different from the next full size. This is why Sidi produce half sizes; to give a close, custom fit. Cycling shoes are meant to be snug; they are designed to cradle your foot closely.

The standard Sidi shoes are based on a 'D' width foot.

Example of size guide



Special Sidi cycling shoe models

The Sidi Mega Range

Sidi has designed its range of Mega range of shoes for those seeking extra volume in a shoe.

The Mega range has 4mm of extra width across the ball of the foot, it is an EE-EEE width (wide/extra wide).

The heel cup is also wider, and the shoes are complete with a higher instep; this is useful, because if for example you wear a size 44, and find it slightly tight around the front or under the arch, then a 44 Mega shoe could be the solution for the perfect fit.

The Mega model may also be useful for cyclists who use very high-volume insoles, or those who have high insteps.

Our top selling Sidi shoes in the Mega range are the Sidi Ergo 4 Carbon Road Shoes (Mega/Wide Fit) for road cyclists, and the Sidi Dragon 4 SRS Carbon MTB Shoe (Mega/Wide Fit) for mountain bikers.



Women's Specific Sidi Cycling Shoes

Sidi shoes are very proud to have been the manufacturer of a women's specific range of cycling, since the 1960s! Sidi know only too well that the female foot has a different structure to that of a male; and as a result they need a specific shoe.

The mould (a.k.a. 'last') for a women's cycling shoe is not just a smaller and narrower version of the men's option, as this would not be sufficient or suitable. The Sidi women's cycling shoe moulds have been generated, refined, and developed to continually provide a great fitting shoe for the female cyclist. A Sidi women's specific shoe also features a narrower heel and ankle; to accommodate the smaller volume foot of female bike riders. 

Sidi carry over all their great closure systems and fit technology to their female line of shoes. We have a great range of women's specific Sidi shoes at Wiggle.

Our range-topping Sidi women's shoes: For road cyclists - the Sidi Women's Wire Carbon Air Road Shoe, and for mountain bikers - the Sidi Cape MTB Shoes

Top Tip: A popular question asked by female customers is "Will men's Sidi shoes fit me?" The answer to this is yes, but only if you have consistently wide feet, from the heel through to the ball/forefront.



Sidi fitting and retention systems

Sidi shoes feature a number of unique fitting and retention systems, which help to provide the rider with a truly personal fit and feel.


Sidi Heel Cup

The Sidi Heel Cup is an adjustable heel retention device, which improves the fit at the top of the heel cup, by closing the back of the shoe securely around the rider's ankle.

The Sidi Diablo Gore Tex Winter MTB Boots is a great winter cycling boot, which features Sidi's Heel Cup, to keep your foot in the right position at all times.The heel retention device improves the fit at the top of the heel cup


Sidi Tecno 3 Push-Dial Closure

The Sidi Tecno 3 system uses a monofilament line, which is similar to fishing line; then wraps this round a ratcheting dial buckle. The fine-tooth ratchet allows for smoother adjustment, and the lacing system provides more even pressure distribution.

The Tecno 3 system adapts the upper of the shoe to the shape of the foot within; providing a customised fit.

View our range of Sidi Wire Carbon Road Shoes which use for the Tecno 3 Push Dial System; or for mountain bikers, look to the Sidi Dragon 4 SRS Carbon MTB Shoe or the incredible value Sidi Cape MTB Shoes.


Soft Instep 3 Closure System

The Soft Instep Closure refers to the wide strap that passes over the upper part of the foot; securing the foot underneath the well-cushioned soft foam tongue.

The height of an individual's arch/instep varies significantly; so in order to get the best fit, Sidi use an adjustable ratchet on one side of the strap and a Techno-3 Dial or ratchet on the other side; so that you can tailor the position of the wide strap to be central over your foot.

The technology means that you accommodate a whole host of foot shapes and instep heights.

Read our review of the Sidi Dragon 4 SRS Carbon MTB Shoes to hear more about the system.

Pressure is spread evenly over the arch area



Cleat and pedal compatibility

Sidi road bike shoes are compatible with all 3 bolt road cleat fixings, so this means you can use Look (all models), Time (RXS/I-Clic/Expresso), Shimano (SPD SL), Ritchey (Echelon), Wellgo, Campagnolo Pro Fit, Mavic and many more cleats with Sidi shoes.

Sidi mountain bike shoes fit with all 2 bolt mountain bike cleat fixings, for instance all Shimano SPD, Time Atac, Crank Brothers, Ritchey, Speedplay Frog, Look Quartz, Wellgo SPD models, BBB, and many more.


Speedplay road pedal fittings

Sidi offer two ways of mounting the Speedplay road pedal (Speedplay road models are Zero, Light Action, X1, X2, X5) cleats:

  • The most popular and standard way is by using the 3 bolt adaptor plate.
  • The second is to opt for a shoe like the Sidi Wire Carbon SP Road Shoe (Speedplay), which is Speedplay specific - This saves weight, as well as lowering the stack height.

If in doubt please contact Wiggle's customer service department, who are able to help with any questions.

Cycle guides
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