Trek Scratch Air 6

2010 MountainDownhill

Travel: 170 / 170 mm Fork / rear shock
Wheels: 26″
Drivetrain: 3 × 9 22–44t / 11–34t
Gear range: 618%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

15.5" 153–167
17.5" 170–184
19.5" 176–189
21.5" 186–196

Components

13 of 14 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

Alpha Red Aluminum w/ABP, Full Floater, alloy EVO Link, E2 tapered head tube, oversized pivot bearings, ISCG03 mounts, 142x12mm or 135x12mm rear axle, replaceable derailleur hanger, adjustable geometry, 170mm travel Not identified

Drivetrain

5 parts

Brakes

1 part

Brakes
- Avid Elixir 5

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

4 sizes

Enter your height to highlight matching ranges.

Size Reported by the manufacturer

Geometry not published

The manufacturer lists these sizes without frame measurements, so there is no drawing or geometry table.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Full suspension
Front travel: 170 mm
Rear travel: 170 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 22
Largest chainring: 44
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 16.8 in
Highest gear: 104.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.35″
Wheel material: Aluminum
Wheel size: 26″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.4 km/h
Highest gear: 39.8 km/h

Total gear range 618%

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: 16.8–104.0 gear inches

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 2010 builds

Differences across 2010 builds
Specification	This bicycle Trek Scratch Air 6	Trek Scratch 7	Trek Scratch 9	Trek Scratch Air 8
Drivetrain
Front chainrings	3	2	2	3
Smallest chainring	22	24	24	22
Largest chainring	44	36	36	44
Lowest gear	16.8 in	18.4 in	18.4 in	16.8 in
Highest gear	104.0 in	85.1 in	85.1 in	104.0 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Rigid seatpost
Other specifications
Bottom bracket standard	Not informed	Not informed	Not informed	BSA