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Basso Bike Size Chart: Astra and Palta II

Official road and gravel geometry without invented rider-height limits

ItalyFounded 1977Official Website
Basso bike sizing guide

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

Where it applies

  • No height-only prescription

    The checked manufacturer pages give geometry but no height or inseam bands. We have not inferred official fit limits from frame labels.

  • Palta generation matters

    The /palta page describes Palta II and links Palta III separately. Use the correct generation when shopping for a used or new gravel bike.

Sources behind this answer

Check next

Compare stack and reach with your existing frame before checking the final cockpit setup.

Compare Basso frame sizes

Continue researching this bike brand

Basso's Astra and Palta II use different sizing systems. We captured the geometry from each official product page, including the reference size for every stack and reach figure. Those pages do not provide height or inseam windows, so compare frames rather than treating a generic height range as a Basso recommendation.

Jump to Basso size chart ↓

Basso Model Geometry Charts

The checked manufacturer pages publish frame geometry, not rider height or inseam limits. We have not invented those limits. Compare the sourced model charts below with a bike that fits, then confirm your choice with the manufacturer or a fitter.

Verified model-year geometry

These rows come from the linked manufacturer charts. Match the product and generation before using them. An undated chart is a dated source capture, not a promise that every model year shares the same geometry. Missing measurements are not estimated.

Basso Astra

Catalog chart checked 2026-10-25; manufacturer model year not specified.

View the manufacturer geometry
Source: Basso Astra official product geometryCaptured: 2026-10-25Reviewed: 2026-10-25Confidence: high

The official table gives identical stack and reach for 45 and 48; those values are preserved, not interpolated. This is a capture of the linked catalog chart, not verification of every Astra model year.

SizeStack (mm)Reach (mm)
45538.9371.1
48538.9371.1
51563.4374.5
53575.9380.4
56602.4382.1
58625.4384.4
61650.4385.5

Basso Palta II

Catalog chart checked 2026-10-25; manufacturer model year not specified.

View the manufacturer geometry
Source: Basso Palta official geometry, Palta II pageCaptured: 2026-10-25Reviewed: 2026-10-25Confidence: high

The official page calls this design Palta II and lists Palta III separately. Do not transfer these five sizes to Palta III. The chart does not publish rider height or inseam limits, and does not name a model year.

SizeStack (mm)Reach (mm)
XS528354
S542370
M563373
L581389
XL600402

Popular Basso Models & Sizing Notes

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

Basso Astra

🚴 Road Bike • Catalog chart
USD quote required; build and market dependent

The sourced 53 has 575.9 mm stack and 380.4 mm reach. Moving to 56 adds 26.5 mm stack but just 1.7 mm reach. The official table lists identical stack/reach for 45 and 48; check the other dimensions and confirm those rows directly before a purchase.

Stack: 575.9mmReach: 380.4mmReference size: 53
See the verified size-by-size geometry

Basso Palta II

🏔️ Gravel Bike • Catalog chart
USD quote required; build and market dependent

The checked Palta II Medium has 563 mm stack and 373 mm reach. Large adds 18 mm stack and 16 mm reach, a much larger reach step than the Astra 53-to-56 change. Basso lists Palta III separately: this five-size chart is not a Palta III fit guide.

Stack: 563mmReach: 373mmReference size: M
Basso Palta II size chart and fit guideSee the verified size-by-size geometry

Basso 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

Basso Sizing FAQ

Accessories for Basso bikes

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

Bell Nomad 2 Jr. MIPS Youth Bike Helmet - Matte Pink (2022), Universal Youth (52-57 cm)

Bell

Bell Nomad 2 Jr. MIPS Youth Bike Helmet - Matte Pink (2022), Universal Youth (52-57 cm)

Universal Youth, 52-57 cm.

$74.95
View on Amazon
AVASTA Small Kids Saddle - Black

Avasta

AVASTA Small Kids Saddle - Black

This offer is size S (For 12-20" Bike), color Black. Check the selected variant and mounting or fit requirements before ordering; other family variants are separate listings.

$19.99
View on Amazon
Bell Lumina 300 Headlight

Bell

Bell Lumina 300 Headlight

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

$15.494.3
View on Amazon
ABUS Granit X-Plus 540 - 9-Inch with USH Holder

Abus

ABUS Granit X-Plus 540 - 9-Inch with USH Holder

Selected 9-inch shackle version with USH frame holder. Holder fits frame tubes 0.59-1.38 inches in diameter. Check clearance around the frame, wheel and fixed rack before ordering.

$155.00
View on Amazon
Bivo Duo 25 oz Stainless Bottle

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
Giro Fixture MIPS Bike Helmet - Matte Black/Grey - Universal Adult (54-61 cm)

Giro

Giro Fixture MIPS Bike Helmet - Matte Black/Grey - Universal Adult (54-61 cm)

This offer is size Universal Adult (54-61 cm), color Matte Black/Grey. Measure head circumference and check the manufacturer size chart and certification label. Children under one year should not ride as bicycle passengers.

$84.95
View on Amazon

Basso Comparisons & Guides

Compare Basso Bikes

Basso Astra vs Colnago V4: Fit & GeometryBasso Astra vs Pinarello F5: Size & FitBasso Astra vs Tarmac SL8: Geometry & Fit
View all comparisons →

Find Your Basso Size

Use our free calculators and guides to determine your ideal Basso frame size.

Road Bike CalculatorCalculate your Basso road bike sizeMountain Bike CalculatorFind your ideal MTB frame sizeGeneral CalculatorUniversal bike sizing tool

Best next guides

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Where to go from your Basso sizing

Turn your measurements into a confident buy.

Calculate your frame sizePunch in your height and inseam to get a size estimate in under a minute.Compare two bikesPut geometry and fit side by side before you commit to one.Find gear for your BassoBrowse helmets, saddles, lights, and locks sized for your setup.

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