The ultimate synthesis of aesthetics, reliability and performance makes the F-121 the shoe of choice for the aspiring triathlete who demands excellence.
The F-121 sports a barefoot-friendly design and is crafted from a mix of lightweight open air mesh for ultimate ventilation. An open tongue, wide opening and large heel loop lets you effortlessly transition between sports. The lightweight stretch-free synthetic upper conforms to your feet.
The F-121 can be customized with the R350 carbon outsole, suitable for the elite triathlete or the R250 fiberglass injected outsole, suitable for the value oriented rider or entry level cyclist.
Sidi Cycling Shoes size guide first, FLR Cycling Shoes and Crono Cycling Shoes size guide under
Sidi Size Guide
*Customers switching to Sidi Shoes or from Sidi;s more than 5 years old, may not wear the same size. All Sidi's, except for winter shoes, are built on the same last, but differences in patterns and materials so keep this in mind when switching between Sidi models. Every Sidi Shoe (except triathlon models) from 2002 onwards is stamped with its size and last type (and M indicates Mega or W indicates women's), Usually on the tongue.
Standard Width is considered as a D width
Mega = EE shoe fit 4mm of extra space across the ball of the foot. If you have high-volume orthotics you may feel more comfortable in a mega shoe.
Women fits - "Women specific" shoes are a narrower and smaller version of the regular fit option. The heel and ankle areas have also been narrowed.
How do I know if its a good fit?
Some people have narrow heels, if you know this to be true we recommend getting a shoe with a heel retention device. This will allow the heel to be narrowed.
Is it too small? If you stand up with your shoes on and your toes are touching the front, your shoe is small. You don't want any toes touching the front of the shoe, this will create hot or numb toes on long rides. You want to be able to wiggle your toes a bit, but not feel like they are "sloshing around"
Tip* Try on your new Sidi Shoes with the cycling socks you normally wear
If the shoe doesn't fit? Don't worry, we offer a 1 free resize policy to make sure you are very comfortable on your bike