What size Bianchi bike should I get for 5'10" (178 cm)?

At 5'10" (178 cm), the published Bianchi road and gravel rows usually point to a 55 cm frame: 175-182 cm on the road chart and 176-184 cm on the gravel chart. A typical 82-84 cm inseam keeps most riders in that row, while an 86 cm inseam can make the 57 worth checking. The Oltre RC at 55 also sits lower at the front than the Specialissima at 55, so compare stack before assuming the same number will feel the same.

What size Bianchi Specialissima RC for 5'8" (173 cm)?

A 5'8" (173 cm) rider with a 77-80 cm inseam fits a 53 Bianchi Specialissima RC (height range 169-177 cm, stack 535 mm, reach 386 mm). The 55 (175-182 cm) is the alternative for riders with a longer torso. The Specialissima's balanced race geometry is less aggressive than the Oltre RC at the same numeric size - 17 mm more stack - which suits gran fondos and mountain stages better than pure aero racing. The Countervail vibration-dampening carbon layup is included on both, so ride quality stays consistent whether you pick 53 or 55.

Is Bianchi sizing the same as Cervélo or other Italian brands?

Bianchi's 55 (stack 535 mm, reach 386 mm on Specialissima) sits between a Cervélo 54 (532/388) and a Cervélo 56 (~545/393) on stack and reach. Italian numeric sizing (Bianchi 47-61) historically measured seat tube length center-to-center, which is why Bianchi's numbers don't line up cleanly with modern stack/reach-driven brands. Compared to Pinarello or Colnago at the same numeric size, Bianchi runs similar - all three use traditional Italian geometry. Cross-reference stack and reach in millimeters rather than trusting the seat tube number when moving between brands.

Are Bianchi bikes true to size?

Bianchi's published height and inseam rows are a useful starting point, but not every 55 rides the same. The Oltre RC sits lower at the front than the Infinito XE, and the Arcadex gravel fit still needs its own stack and reach check. If you land between two rows, use the chart to narrow the choice, then compare the exact model geometry before you order.

Why does Bianchi use 47-61 numeric sizing instead of S/M/L?

Bianchi has measured frames in centimeters along the seat tube since 1885 - it's the traditional Italian convention used continuously for over a century. The numeric sizes (47, 50, 53, 55, 57, 59, 61) historically tracked seat tube length center-to-center, though modern Bianchi frames are designed around stack and reach. For riders cross-referencing to S/M/L brands, a 47 is roughly XS, 50 is S, 53 is M, 55 is M/L, 57 is L, 59-61 is XL. Use the height and inseam columns rather than the numeric label when comparing across brands.

Bianchi Bike Size Chart: Road and Gravel Fits by Height

Published height and inseam ranges for Oltre, Specialissima, Infinito, Impulso Pro, and Arcadex

Where this answer applies, what it is based on, and what to check next

Where it applies

Current Bianchi road charts
Applies to the numeric road rows on this page and to the fit guidance for Specialissima RC, Oltre RC, and Infinito XE.
Current Bianchi gravel charts
Applies to Impulso Pro and Arcadex on the gravel chart. If a build uses a different cockpit or wheel setup, check the exact model page before you treat the chart as final.

Sources behind this answer

Bianchi road model pages
Road Bike · Specialissima RC, Oltre RC, Infinito XE · 2025
Measurement basis: Published rider height and inseam rows, then stack and reach from the live road model pages.
Reviewed: 2026-09-10
Still uncertain: The published rows get you into the right size band, but an Oltre and an Infinito do not put the bars at the same height even when the frame number matches.
Bianchi gravel model pages
Gravel Bike · Impulso Pro, Arcadex · 2025
Measurement basis: Published gravel size rows plus the current model geometry Bianchi lists for each frame size.
Reviewed: 2026-09-10
Still uncertain: Bianchi does not use one road-to-gravel translation rule. If you are between two sizes, compare the exact gravel frame's stack, reach, and standover before ordering.

Check next

Use your inseam to see whether the smaller or larger Bianchi row deserves the first test ride.

Run the general bike size calculator

ItalyFounded 1885Official Website

Bianchi's road range still uses traditional numeric frame sizes, while the current gravel line follows its own chart. Use the height row first, confirm the inseam range, then check stack and reach on the exact model. That's the part that separates a low Oltre fit from a taller Infinito fit, even when both carry the same number.

Jump to Bianchi size chart ↓

Bianchi Size Charts by Category

Bianchi Road Bike Size Chart

Size	Height Range	Inseam Range
47	5'2" - 5'5"(157 - 165 cm)	27.6" - 29.5"(70 - 75 cm)
50	5'4" - 5'7"(163 - 171 cm)	29.1" - 30.7"(74 - 78 cm)
53	5'7" - 5'10"(169 - 177 cm)	30.3" - 32.3"(77 - 82 cm)
55	5'9" - 5'12"(175 - 182 cm)	31.9" - 33.9"(81 - 86 cm)
57	5'11" - 6'2"(180 - 188 cm)	33.5" - 35.4"(85 - 90 cm)
59	6'1" - 6'4"(186 - 193 cm)	35.0" - 36.6"(89 - 93 cm)
61	6'3" - 6'7"(191 - 200 cm)	36.2" - 38.2"(92 - 97 cm)

Height: 5'2" – 5'5" (157–165 cm)

Inseam: 27.6" – 29.5" (70–75 cm)

Height: 5'4" – 5'7" (163–171 cm)

Inseam: 29.1" – 30.7" (74–78 cm)

Height: 5'7" – 5'10" (169–177 cm)

Inseam: 30.3" – 32.3" (77–82 cm)

Height: 5'9" – 5'12" (175–182 cm)

Inseam: 31.9" – 33.9" (81–86 cm)

Height: 5'11" – 6'2" (180–188 cm)

Inseam: 33.5" – 35.4" (85–90 cm)

Height: 6'1" – 6'4" (186–193 cm)

Inseam: 35.0" – 36.6" (89–93 cm)

Height: 6'3" – 6'7" (191–200 cm)

Inseam: 36.2" – 38.2" (92–97 cm)

Bianchi Gravel Bike Size Chart

Size	Height Range	Inseam Range
47	5'2" - 5'5"(157 - 165 cm)	27.6" - 29.5"(70 - 75 cm)
50	5'4" - 5'8"(163 - 172 cm)	29.1" - 31.1"(74 - 79 cm)
53	5'7" - 5'10"(170 - 178 cm)	30.7" - 32.7"(78 - 83 cm)
55	5'9" - 6'0"(176 - 184 cm)	32.3" - 34.3"(82 - 87 cm)
57	5'12" - 6'3"(182 - 190 cm)	33.9" - 35.8"(86 - 91 cm)
59	6'2" - 6'6"(188 - 198 cm)	35.4" - 37.4"(90 - 95 cm)

Height: 5'2" – 5'5" (157–165 cm)

Inseam: 27.6" – 29.5" (70–75 cm)

Height: 5'4" – 5'8" (163–172 cm)

Inseam: 29.1" – 31.1" (74–79 cm)

Height: 5'7" – 5'10" (170–178 cm)

Inseam: 30.7" – 32.7" (78–83 cm)

Height: 5'9" – 6'0" (176–184 cm)

Inseam: 32.3" – 34.3" (82–87 cm)

Height: 5'12" – 6'3" (182–190 cm)

Inseam: 33.9" – 35.8" (86–91 cm)

Height: 6'2" – 6'6" (188–198 cm)

Inseam: 35.4" – 37.4" (90–95 cm)

Fit check

Between two Bianchi sizes?

Based on the published Bianchi road chart

If your height or inseam lands between two published Bianchi sizes, use the smaller frame for a more aggressive fit or the larger frame for a more upright, comfortable fit.

Use the published size chart as the source of truth when your measurements sit between two sizes.
Choose the smaller frame when you prefer a lower, faster, more aggressive position.
Choose the larger frame when you want more comfort, stack, and easier reach.

Height (cm)Inseam (cm)

Priority

Recommendation

Confidence: medium — the published chart clearly leans this direction.

The chart points toward 55. 55 is 1.5 cm from your height midpoint and 0.5 cm from your inseam midpoint, while 53 is 4.0 cm and 4.5 cm.

Candidate sizes

55 vs 53

Numeric delta

1.5 cm height · 0.5 cm inseam

Use the bike size calculator Back to the chart

Source note

This recommendation uses the published Bianchi size ranges from the chart on this page. It is a decision aid, not a professional fit assessment.

Popular Bianchi Models & Sizing Notes

Specific sizing recommendations for Bianchi's most popular bike models. Geometry measurements shown for reference size (typically M or 54cm).

Bianchi Oltre RC

🚴 Road Bike • 2025

$6,000 - $15,000

Aero race bike with Countervail technology and fully integrated cable routing. The aggressive aero position has a lower stack than the Specialissima-riders prioritizing comfort should consider the next size up.

Stack: 518mmReach: 392mm

Bianchi Specialissima RC

🚴 Road Bike • 2025

$5,500 - $14,000

Lightweight climbing bike weighing under 6.8 kg. Balanced race geometry offers a slightly more relaxed position than the Oltre, making it well-suited for gran fondos and mountain stages.

Stack: 535mmReach: 386mm

Bianchi Infinito XE

🚴 Road Bike • 2025

$2,800 - $7,500

Endurance road bike designed for long rides with Countervail vibration damping. The taller head tube and shorter top tube put the bars higher than the Oltre, so riders moving between the two should compare stack before assuming the same road size feels identical.

Stack: 575mmReach: 372mm

Bianchi Impulso Pro

🏔️ Gravel Bike • 2025

$1,500 - $3,200

Carbon gravel race bike aimed at fast mixed-surface riding and gravel fondos rather than loaded adventure rides. Its geometry is close to Bianchi's road fit, so riders coming from a Bianchi road frame often start with the same number, then confirm stack, reach, and standover on the exact gravel build.

Stack: 545mmReach: 380mm

Bianchi Arcadex

🏔️ Gravel Bike • 2025

$3,500 - $8,000

Carbon gravel bike with Countervail technology for off-road vibration dampening. Slightly longer wheelbase and higher bottom bracket than road models-size the same as your Bianchi road bike for consistent fit.

Stack: 565mmReach: 378mm

Bianchi Sizing Tips

How to Measure

• Height: Stand barefoot against a wall and measure from floor to top of head
• Inseam: Stand barefoot with feet 6 inches apart, press a level book firmly upward, and measure from the floor to its top edge
• Arm Reach: For road bikes, measure from shoulder to fingertips

When Between Sizes

• Comfort priority: Choose the larger size
• Performance priority: Choose the smaller size
• Long torso: Size up for better reach
• Long legs: Size down for better standover

Bianchi Sizing FAQ

Accessories for Bianchi bikes

Helmets, saddles, lights and locks that fit any Bianchi build.

Bell

Bell Nomad 2 MIPS

This ASIN is Small/Medium 52-57 cm. Check the selected Amazon size/color before checkout.

$48.714.5

View on Amazon

Avasta

AVASTA Kids Bicycle Saddle

Standard saddle rail spacing fits most kids' seatpost clamps. Designed primarily for 12-20" wheel kids' bikes; larger riders may prefer a wider adult saddle.

$19.994.7

View on Amazon

Bell

Bell Lumina 300 Headlight

Tool-free handlebar mount; check bar space around computers, bells, and baskets.

$15.494.3

View on Amazon

Abus

ABUS Granit X-Plus 540

Inner dimensions: 5.5" x 8" (14 x 20cm). Premium size for frame + wheel security. Heavy-duty for high-theft areas.

$155.00

View on Amazon

Bivo

Bivo Duo 25 oz Stainless Bottle

Fits most major cages, but the 77 mm maximum diameter is a touch larger than a standard plastic bottle. Check tight side-load cages on very small frames.

$44.00

View on Amazon