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Fi'zi:k R4B Uomo Boa Shoe - Men's

Sale $202.46 $224.95 10% off

Item # FIZ003R

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Item # FIZ003R

Sleek security.

Fizik's R4B Uomo Boa Shoes may not have a full carbon sole like its more expensive siblings, but it includes the same sleek Microtex upper and is actually even more customizable in fit. The fit comes courtesy of a longer top opening and an extra strap over the toe box, allowing for targeted volume around the sensitive metatarsal areas but a snug fit on the mid foot and above.

The shoe's Boa IP1-A closure system also pulls the upper across the foot rather than from both sides, relieving pressure without sacrificing security. While we won't be surprised to see this asymmetric design eventually appear across Fizik's shoe line, only the top-tier R1B Uomo currently features a similar construction.

  • Mid-range cycling shoe inspired by Fizik's top-tier designs
  • BOA dial and hook-and-loop straps provide customizable fit
  • Perforated Microtex upper blends durability with flexible comfort
  • Carbon-injected synthetic sole delivers reliable power transfer
  • Molded heel cup and insole for maximum pedaling efficiency

Tech Specs

Upper Material:
Microtex
Closure:
1 BOA dial, 2 hook-and-loop straps
Footbed:
Fizik Cycling Insole
Sole:
Injected composite carbon vented
Cleat Compatibility:
3-bolt road
Claimed Weight:
254 g
Recommended Use:
road cycling
Manufacturer Warranty:
2 years

Size chart

Fi'zi:k

Footwear
EUUKUSMM
36 3 1/4 4 1/4 230
36.5 3 3/4 4 3/4 233.5
37 4 1/4 5 1/4 237
37.5 4 1/2 5 1/2 240
38 5 6 243.5
38.5 5 1/4 6 1/4 247
39 5 3/4 6 3/4 250
39.5 6 7 253.5
40 6 1/2 7 1/2 257
40.5 7 8 260
41 7 1/4 8 1/4 263.5
41.5 7 3/4 8 3/4 267
42 8 9 270
42.5 8 1/2 9 1/2 277
43 8 3/4 9 3/4 277
43.5 9 1/4 10 1/4 280
44 9 3/4 10 3/4 283.5
44.5 10 11 287
45 10 1/2 11 1/2 290
45.5 10 3/4 11 3/4 293.5
46 11 1/4 12 1/2 300
47 12 13 303.5
48 12 3/4 13 3/4 310

Reviews & Community

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Unanswered Question
Avg. ride time: 2h 20m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

What is the "injected carbon composite" outsole? Is there a stiffness index to compare with the carbon R3B?

Thanks

Comfortable yet stiff enough shoe

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size

Most comfortable of the Fizik line that I tried (R1 & R3) The R4 has a wider toe box it seems and the asymmetric upper reduces pressure on the top of my foot. Wore specialized for years but am now firmly a Fizik fan.