Bianchi Siena Altus

2025 UrbanFitness Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 7 42t / 14–34t
Gear range: 243%
Frame: Aluminum
Brakes: Rim brake

Not published by the manufacturer

Sizes and geometry

Components

8 of 20 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Siena Gent Al6061, 700c, Old 135mm, Size: 16"/18.5"/21"/23" (41cm,47cm,54cm,59cm) Not identified

Suspension

1 part

Fork
- Bianchi

Drivetrain

6 parts

Bottom bracket

Steel, cartridge type Not identified
Cassette
- Shimano MF-TZ31 24–34t
MF-TZ31
Chain
- KMC
Crankset

Alloy crank w/42T, w/chainguard, crank length: 170mm-16", 175mm-18.5/23" Not identified
Rear derailleur
- Shimano Tourney RD-TY300 7 speeds
RD-TY300
Shifters
- Shimano Tourney

Brakes

2 parts

Brake levers

Alloy 3 fingers levers Not identified
Brakes

V-Brake, alloy Not identified

Wheels and tires

4 parts

Front hub

Alloy, 36 hole Not identified
Rear hub

Alloy, 36 hole Not identified
Rims

Alloy double wall, 36 holes Not identified
Tires
- Kenda

Cockpit and contact points

6 parts

Handlebar
- Bianchi
Headset

Threaded, steel, 1.1/8" Not identified
Pedals

Included Not identified
Saddle
- Bianchi
Seatpost

Alloy, diam 27.2mm, length 300mm Not identified
Stem

Alloy diam 25.4mm, quill length 180mm, ext: 80mm-16", 10mm-18.5-23" Not identified

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 42
Largest chainring: 42
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 34
Lowest gear: 35.8 in
Highest gear: 87.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 38c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

35.8 gear inches

This value is above the central range for this class.

Cohort: Urban / Fitness Model year: 2025
Sample: 230 bicycles with this information
Coverage: 81.8% of the class

Highest gear

87.0 gear inches

This value is below the central range for this class.

Cohort: Urban / Fitness Model year: 2025
Sample: 230 bicycles with this information
Coverage: 81.8% of the class

Shifting

Mechanical

13 of 281 bicycles with this information use electronic shifting.

Cohort: Urban / Fitness Model year: 2025
Sample: 281 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 13.7 km/h
Highest gear: 33.3 km/h

Total gear range 243%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 35.8–87.0 gear inches
Class reference (p10–p90): 21.8–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2025
Lowest gear: 230 bicycles with this information, 81.8% of the class
Highest gear: 230 bicycles with this information, 81.8% of the class