BMC Twostroke AL 20

Name: BMC Twostroke AL 20
Brand: BMC

2023 YouthMountain youth Manufacturer page

BMC Twostroke AL 20, color Turquoise / Black

Last known price: $659

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 8
Weight: 8.6 kg 19.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

10 of 18 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

Twostroke AL 20" Lightweight Aluminium with Powder Coat Finish | 1 1 / 8" Head Tube | 140mm Post Mount | 9 x 135mm QR Not identified

Suspension

1 part

Fork

Twostroke AL 20" Lightweight Aluminium with Powder Coat Finish | 140mm Post Mount | 9X100mm QR Not identified

Drivetrain

6 parts

Bottom bracket

BSA Threaded Bottom Bracket Not identified
Cassette
- SunRace
Chain
- SRAM
Crankset

Lightweight Forged Alloy Cranks Not identified
Rear derailleur
- SRAM X4 7 speeds
Shifters
- SRAM X4

Brakes

2 parts

Brakes
- Tektro
HD-M286
Disc rotors
- Tektro

Wheels and tires

4 parts

Front hub

CNC Machined Alloy Hub Body - Sealed Bearings - Quick Release Not identified
Rear hub

CNC Machined Alloy Hub Body - Sealed Bearings - Quick Release Not identified
Rims

DD32 Not identified
Tires
- Kenda Booster

Cockpit and contact points

4 parts

Handlebar
- SDG Slater
Saddle
- SDG FLY
Seatpost

Alloy | 27.2mm Not identified
Stem
- BMC

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 20"

Table

Reach 305mm

Stack 412mm

Wheelbase 833mm

Head angle 68.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 20″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	305
Stackmm	412
Top tube lengthmm	431
Seat tube lengthmm	275
Head tube lengthmm	105
Head tube angle	68°
Seat tube angle	73°
Chainstay lengthmm	342
Wheelbasemm	833
Front centermm	455
Bottom bracket dropmm	40
Standover heightmm	490
Fork rakemm	35
Trailmm	66
Stack/reach ratio	1.35
Suspension and parts
Crank lengthmm	127
Handlebar widthmm	650
Stem lengthmm	35
Stem angle	6°
Seatpost lengthmm	300

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum
Bicycle weight: 8.6 kg

19.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Rear sprockets: 8

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 2.4″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 20″

Technical analysis

1 measure

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

Shifting

Mechanical

20 of 423 bicycles with this information use electronic shifting.

Cohort: Youth / Mountain youth Model year: 2023
Sample: 423 bicycles with this information
Coverage: 100.0% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2023 builds
Specification	This bicycle BMC Twostroke AL 20	BMC Twostroke 01 Five	BMC Twostroke 01 Four	BMC Twostroke 01 ONE	BMC Twostroke 01 Three	BMC Twostroke 01 TWO
Frame
Frame material	Aluminum	Carbon	Carbon	Carbon	Carbon	Carbon
Fork material	Aluminum	Not informed	Not informed	Not informed	Not informed	Not informed
Bicycle weight	8.6 kg	Not informed	Not informed	Not informed	Not informed	Not informed
Weight limit	Not informed	110 kg	110 kg	110 kg	110 kg	110 kg
Suspension
Suspension configuration	Rigid	Hardtail	Hardtail	Hardtail	Hardtail	Hardtail
Drivetrain
Rear sprockets	8	12	12	12	12	12
Smallest chainring	Not informed	Not informed	Not informed	34	34	34
Largest chainring	Not informed	Not informed	Not informed	34	34	34
Smallest sprocket	Not informed	Not informed	Not informed	10	10	10
Largest sprocket	Not informed	Not informed	Not informed	52	52	52
Lowest gear	Not informed	Not informed	Not informed	19.0 in	19.0 in	19.0 in
Highest gear	Not informed	Not informed	Not informed	98.6 in	98.6 in	98.6 in
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	Electronic	Mechanical	Mechanical
Other specifications
Bottom bracket standard	BSA	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92
Suspension	Rigid	Hardtail	Hardtail	Hardtail	Hardtail	Hardtail
Tire width	2.4″	2.25″	2.25″	2.25″	2.25″	2.25″
Travel	Configuration: RigidFront: Additional specification: Not available: YesRear: Additional specification: Not available: Yes	Configuration: HardtailFront: Additional specification: Not available: NoRear: Additional specification: Not available: Yes	Configuration: HardtailFront: Additional specification: Not available: NoRear: Additional specification: Not available: Yes	Configuration: HardtailFront: Additional specification: Not available: NoRear: Additional specification: Not available: Yes	Configuration: HardtailFront: Additional specification: Not available: NoRear: Additional specification: Not available: Yes	Configuration: HardtailFront: Additional specification: Not available: NoRear: Additional specification: Not available: Yes
Wheel size	20″	29″	29″	29″	29″	29″
Fork spring	Not informed	Not informed	Air	Not informed	Air	Not informed

Changes since 2022
Specification	2022 BMC Twostroke AL 20	This bicycle BMC Twostroke AL 20
Frame
Bicycle weight	9.2 kg	8.6 kg
Drivetrain
Smallest chainring	32	Not informed
Largest chainring	32	Not informed
Smallest sprocket	11	Not informed
Largest sprocket	34	Not informed
Lowest gear	18.8 in	Not informed
Highest gear	58.2 in	Not informed