Transition Bottlerocket Dual Crown

Name: Transition Bottlerocket Dual Crown
Brand: Transition

2025 MountainDownhill Manufacturer page

Last known price: $5,199

Prices shown first for United States
Travel: 203 / 203 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 7 34t / 11–25t
Gear range: 227%
Weight: 17.75 kg 39.1 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 154–170
MD 164–182
LG 175–190
XL 184–200

Components

20 of 23 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

Bottlerocket Alloy 200mm Not identified

Suspension

2 parts

Drivetrain

7 parts

Bottom bracket

73mm BSA Threaded Not identified
Cassette
- SRAM PG-720 7 speeds 11–25t
PG-720
Chain
- SRAM PC-1130 11 speeds
PC-1130
Chain guide
- e*thirteen
Crankset
- SRAM X1-Carbon DUB 11 speeds 34t
Rear derailleur
- SRAM GX DH 1x X-HORIZON 7 speeds
Shifters
- SRAM GX DH X-ACTUATION Trigger 7 speeds

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Grips
- ODI
Handlebar
- Burgtec
Headset
- FSA NO.57E
Saddle
- Burgtec
Seatpost

Trans-X SP66 Not identified
Stem
- Race Face Chester 35 Direct Mount

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 450mm

Stack 616mm

Wheelbase 1220mm

Head angle 64.0°

Seat angle 78.7°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	425	450	475	500
Stackmm	607	616	625	625
Top tube lengthmm	538	573	606	638
Seat tube lengthmm	360	390	420	440
Head tube lengthmm	100	110	120	120
Head tube angle	64°	64°	64°	64°
Seat tube angle	79.4°	78.7°	78.2°	77.7°
Chainstay lengthmm	435	435	435	435
Wheelbasemm	1191	1220	1249	1279
Front centermm	756	785	814	844
Bottom bracket dropmm	15	15	15	15
Bottom bracket heightmm	340	340	340	340
Fork rakemm	38	38	38	42
Trailmm	131	131	131	127
Stack/reach ratio	1.43	1.37	1.32	1.25

Not published by the manufacturer: Standover height, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 17.75 kg

39.1 lb

Suspension

Suspension configuration: Full suspension
Front travel: 203 mm
Rear travel: 203 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 7
Smallest sprocket: 11
Largest sprocket: 25
Lowest gear: 37.4 in
Highest gear: 85.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

2 measures

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

Front travel

203 mm

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2025
Sample: 99 bicycles with this information
Coverage: 98.0% of the class

Rear travel

203 mm

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2025
Sample: 95 bicycles with this information
Coverage: 94.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 14.3 km/h
Highest gear: 32.6 km/h

Total gear range 227%

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: 37.4–85.0 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 2025 builds

Differences across 2025 builds
Specification	This bicycle Transition Bottlerocket Dual Crown	Transition Bottlerocket Single Crown
Frame
Bicycle weight	17.75 kg	17.69 kg
Suspension
Front travel	203 mm	180 mm
Drivetrain
Smallest chainring	34	30
Largest chainring	34	30
Rear sprockets	7	12
Smallest sprocket	11	10
Largest sprocket	25	52
Lowest gear	37.4 in	15.9 in
Highest gear	85.0 in	82.5 in
Cockpit
Seatpost	Rigid seatpost	Dropper seatpost
Other specifications
Rear travel	203 mm	180 mm