Rocky Mountain Thunderbolt 730

2017 MountainTrail

Last known price: $2,499

Prices shown first for United States
Travel: 120 / 120 mm Fork / rear shock
Wheels: 27.5″
Gear range: 518%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 156–166
SM 163–174
MD 171–182
LG 179–189
XL 185–195

Components

22 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

FORM™ 7005 Series Custom Formed Alloy. BC2™ Pivots & Grease Ports. Sealed Cartridge Bearing Main Pivot. Press Fit BB. RIDE-9™ Adjustable Geometry & Suspension Rate. Not identified

RIDE-9

Suspension

2 parts

Drivetrain

7 parts

Bottom bracket
- Shimano SM-BB71
SM-BB71
Cassette
- Shimano CS-HG50 11–36t
CS-HG50HG-50
Chain
- Shimano CN-HG54
CN-HG54HG-54
Crankset
- Shimano FC-M615 38/24t
FC-M615
Front derailleur
- Shimano Deore
Rear derailleur
- Shimano Deore XT RD-M8000
RD-M8000
Shifters
- Shimano Deore

Brakes

2 parts

Brake levers
- Shimano BL-M506
BL-M506
Brakes
- Shimano BL-M506
BL-M506

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 413mm

Stack 572mm

Wheelbase 1131mm

Head angle 66.5°

Seat angle 73.0°

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 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	368	390	413	436	461
Stackmm	554	563	572	582	596
Top tube lengthmm	540	565	590	615	645
Seat tube lengthmm	381	419	457	483	521
Head tube lengthmm	100	110	120	130	145
Head tube angle	66.5°	66.5°	66.5°	66.5°	66.5°
Seat tube angle	73°	73°	73°	73°	73°
Chainstay lengthmm	422	422	422	422	422
Wheelbasemm	1079	1105	1131	1157	1189
Front centermm	658	684	710	736	768
Bottom bracket dropmm	20.2	20.2	20.2	20.2	20.2
Bottom bracket heightmm	335	335	335	335	335
Standover heightmm	702	702	702	702	702
Fork rakemm	53	53	52	51	51
Trailmm	97	97	98	99	99
Stack/reach ratio	1.51	1.44	1.39	1.34	1.29

Not published by the manufacturer: 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

Suspension

Suspension configuration: Full suspension
Front travel: 120 mm
Rear travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 24
Largest chainring: 38
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 18.3 in
Highest gear: 95.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.3″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

3 measures

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

Front travel

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2017
Sample: 429 bicycles with this information
Coverage: 95.7% of the class

Lowest gear

18.3 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2017
Sample: 416 bicycles with this information
Coverage: 92.8% of the class

Highest gear

95.0 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2017
Sample: 416 bicycles with this information
Coverage: 92.8% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.0 km/h
Highest gear: 36.4 km/h

Total gear range 518%

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: 18.3–95.0 gear inches
Class reference (p10–p90): 16.8–94.9 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2017
Lowest gear: 416 bicycles with this information, 92.8% of the class
Highest gear: 416 bicycles with this information, 92.8% 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 2017 builds
Specification	This bicycle Rocky Mountain Thunderbolt 730	Rocky Mountain Thunderbolt 710	Rocky Mountain Thunderbolt 730 MSL	Rocky Mountain Thunderbolt 750	Rocky Mountain Thunderbolt 750 MSL	Rocky Mountain Thunderbolt 770 MSL
Frame
Frame material	Aluminum	Aluminum	Carbon	Aluminum	Carbon	Carbon
Suspension
Front travel	120 mm	120 mm	130 mm	130 mm	130 mm	130 mm
Drivetrain
Front chainrings	2	2	1	1	1	1
Smallest chainring	24	22	32	32	32	32
Largest chainring	38	36	32	32	32	32
Largest sprocket	36	36	42	42	42	46
Lowest gear	18.3 in	16.8 in	21.0 in	21.0 in	21.0 in	19.1 in
Highest gear	95.0 in	90.0 in	80.0 in	80.0 in	80.0 in	80.0 in
Rear sprockets	Not informed	Not informed	11	Not informed	Not informed	Not informed
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost
Other specifications
Tire width	2.3″	2.25″	2.3″	2.3″	2.3″	2.3″
Bottom bracket standard	Not informed	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92
Fork spring	Not informed	Air	Air	Air	Air	Air

Changes since 2016
Specification	2016 Rocky Mountain Thunderbolt 730	This bicycle Rocky Mountain Thunderbolt 730
Frame
Fork material	Aluminum	Not informed
Bicycle weight	13.5 kg	Not informed
Drivetrain
Rear sprockets	10	Not informed
Other specifications
Bottom bracket standard	BSA	Not informed
Fork spring	Air	Not informed
Tire width	2.25″	2.3″