Sidi Spider SRS Carbon Technomicro Shoes

Sidi Spider SRS Carbon Technomicro Shoes
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Sidi's Spider SRS Carbon Technomicro Shoes offer awesome power transfer and support and they're almost as comfy as your bedroom slippers. The entire upper is comprised of tough, breathable Technomicro for a secure yet supple feel and they have stiff Sidi Carbon Composite SRS soles that ensure all your power hits the pedals. You also get Sidi's Caliper buckles that let you dial in the fit even while riding, Sidi's High Security Velcro straps that stay tight, and their Soft Instep Closures that eliminate pressure points. These sweet shoes even have ventilated heels to keep your feet cool on hot days and Sidi's integrated rubber toe guards and SRS system that increase the life of the shoes even if you walk/run in them. Is it any wonder the Spiders are so popular with cyclocross racers?

Fitting Yourself to Sidi Cycling Shoes

There is no substitute for a perfect fit. Your shoes are the most important contact point between you and your bike, affecting power, comfort, and providing that locked-in feeling of oneness with your bicycle.

Fitting tips
Try shoes on at the end of the day — your feet swell by at least a half-size as the day progresses, and as much as a full size on hot days.

Stand up. Feet expand under pressure — standing up will give you a better sense of how your shoes will fit under pedaling pressure.

Bring the socks and orthotics you ride with — they have a tremendous influence on foot volume and fit.

Be patient! Non-leather cycling shoes do not stretch over time — how they fit in the store will be how they fit, period. However, as the shoes warm up from body heat the uppers will become more pliable and conforming. Give your shoes at least 10 minutes to heat up, and readjust the closures to accurately gauge how they’ll feel mid-ride.

Foot measuring devices typically measure length and width only, and do not account for overall shape or foot volume. It’s imperative that you try on shoes a half-size larger and smaller than your measured size, for confirmation of proper fit.

How Sidis are sized
Sidi half sizes are 3mm longer, with slightly increased toe box volume. Full sizes are 6mm longer, with proportionally greater volume.

Standard-size Sidis roughly correspond to a D width on the industry-standard Brannock sizing scale.

Mega sizes are cut with more material throughout, and larger-volume heel cups. Mega sizes roughly correspond to an EE/EEE width on the Brannock sizing scale.

Narrow sizes are cut with less material throughout, and narrower, lower-volume heel cups. Narrow sizes roughly correspond to a B/C width on the Brannock sizing scale.

Women’s Sidis have a more tapered shape and lower volume than standard or narrow-width Sidis. Women with consistently wide or narrow feet, from heel to the forefoot may experience better fit in Sidi standard or narrow widths.

The four common cleat bolt patterns.
In order to mount your pedal cleats to your shoes (cleats are included with new pedals and sold separately), the cleats and shoes must have matching bolt patterns. 

There are four cleat configurations found on cycling shoes (diagram): SPD-R, Look/SPD-SL, SPD and Speedplay. Road shoes feature one, two or even three of these. Off-road shoes usually use the SPD pattern. If you're unsure which cleats your shoes require, please ask us. We're here to help!

Sidi's Technomicro is a super-fine composite microfiber material created from strands one thousandth the thickness of silk. An update to their long-established Lorica synthetic leather, the fibers are then injected with special resins to act like natural leather, but with better strength, softer texture, and better moisture protection. It's highly resistant to abrasion and breathes nicely on hot summer days, and best of all, it helps make Sidis fit even better.

Sidi's Spider features a carbon composite sole with completely replaceable treads and parts. Super stiff for optimal power transfer while maintaining flexibility to run over obstacles, the sole shaves 40 grams per pair compared with previous Spider SRS. Plus, the aggressive, softer durometer tread delivers extra traction in slippery conditions.

Sidi Soft Instep Closure System
Sidi's Soft Instep Closure System is anatomically shaped to spread pressure and provide a snug, secure, and ultra-comfortable fit.
Sidi's Caliper buckles make it super easy to fine-tune how tight your shoes are even when you're riding. Simply lift the Ratchet Levers to tighten, and press the Side Levers to loosen the fit or release the strap.
Fit Relievers are tiny cuts in the tongue that reduce bulk and keep it from rolling over and digging into your foot.

Part Numbers

Option UPC MPN Store SKU
39 2000000438900 14204121390
39.5 2000000438917 14204121395
40 2000000438924 14204121400
40.5 2000000438931 14204121405
41 2000000438948 14204121410
41.5 2000000438955 14204121415
42 2000000438962 14204121420
42.5 2000000438979 14204121425
43 2000000438986 14204121430 120817
43.5 2000000438993 14204121435
44 2000000439006 14204121440 120729
44.5 2000000439013 14204121445 120733
45 2000000439020 14204121450 120818
45.5 2000000439037 14204121455
46 2000000439044 14204121460
46.5 2000000439051 14204121465
47 2000000439068 14204121470
48 2000000439075 14204121480