Sorry, this product is no longer available!
SiDi Ergo 4 Carbon Composite Mega Road Cycling Shoe is no longer available at Merlin Cycles. However you may find an alternative or updated product below.

This item was discontinued 7th June 2019.

If you require help finding an alternative to this product please contact customer services.

SiDi Ergo 4 Carbon Composite Mega Road Cycling Shoe


The Sidi Ergo 4 Carbon Composite Mega road cycling shoe is the fourth generation of this popular road shoe which sees an improvement to the closure system as well as some aesthetic changes bringing even more Italian styling to this classic looking shoe. The Ergo 4 shares many of the same features as their Wire flagship model higher up in the range and includes the brilliantly functional Techno 3 closure system featuring dials and nylon wires that evenly spread load over the shoe avoiding any pressure points on the top of the foot. Two dials allow you to fine tune your fit even while on-the-fly and an additional Velcro strap allows adds extra security above the toe box.

The Sidi Ergo 4 features a super-stiff Twelve Carbon Composite sole designed specifically to cradle the foot while providing a stiff platform that allows you to transfer all your power through to the pedals. With an adjustable heel retention device that reinforces the top of the heel cup the Ergo 4 shoes allow you to adjust the interface between your foot and the shoe’s heel eliminating any potential for heel lift during those out of the saddle efforts.

This Mega version of the Ergo 4 is a great option for those of you with wider feet particularly if you normally struggle to find cycling shoes that fit comfortably. The Mega fit adds 4mm to the width of the shoe at the ball of the foot as well as greater overall volume, a wider heel and a higher instep.



  • Sidi Twelve Carbon Composite sole
  • Soft Instep 3 Closure System
  • Techno 3 System
  • Velcro Security System
  • Adjustable Heel Retention Device
  • Replaceable non-slip polyurethane heel pad
  • All buckles and mechanisms are replaceable
Mr Whitcraft Size guidance was perfect. Product was shipped quickly and in new condition.
Paul Fantastic quality, looks stylish and very comfy with the wider fit
Theron Comfortable shoes, definitely a good pick for wide feet. The sizes are pretty much the same as other brands (I'm a 48 in most shoes & got a 48, which is an identical fit). Somewhat heavy for the price.
Mr Nadeau Even if you don`t have big foot but only want more room for your toes, this is the shoe you need. Heel still supported very well. When you tighten the buckle you will notice a little bump in the material near the buckle but it does not cause any particular problem. Someone else looking at your shoe may think you have shoes too tall for you. I also have Sidi mega 5-pro. Mega ergo 4 is better for heel retention.
Team Padyak I love these shoes. Excellent ft and very comfortable. I like the quick and fast service too
Mr Lam This is my first SiDi. Very happy with this high quality cycling shoe. No regret!