Rocky Mountain Thunderbolt Alloy 30

2019 MountainTrail

Last known price: $2,649

Prices shown first for United States
Travel: 130 / 130 mm Fork / rear shock
Wheels: 27.5″, 26″
Drivetrain: 1 × 11 32t / 11–46t
Gear range: 418%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

XS Steep
XS Steep
XS Slack
XS Slack
SM Steep
SM Steep
SM Slack
SM Slack
MD Steep
MD Steep
MD Slack
MD Slack
LG Steep
LG Steep
LG Slack
LG Slack
XL Steep
XL Steep
XL Slack
XL Slack

The manufacturer did not publish rider heights for these sizes.

Components

20 of 22 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™ Alloy. Full Sealed Cartridge Bearings. Press Fit BB. Internal Cable Routing. 2-Bolt ISCG05 Tabs. RIDE-9™ Adjustable Geometry + Suspension Rate Not identified

RIDE-9

Suspension

2 parts

Drivetrain

6 parts

Brakes

2 parts

Brake levers
- Shimano BL-MT500
BL-MT500
Brakes
- Shimano BR-MT500
BR-MT500

Wheels and tires

5 parts

Front hub
- Shimano Deore HB-M6010
HB-M6010
Rear hub
- Shimano Deore FH-M6010
FH-M6010
Rims
- WTB
Spokes

2.0 Stainless Not identified
Tires
- Maxxis Minion DHR II

Cockpit and contact points

6 parts

Sizes and geometry

20 sizes Open in the geometry plotter

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

Size MD Steep

Table

Reach 442mm

Stack 593mm

Wheelbase 1160mm

Head angle 67.1°

Seat angle 75.1°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 20 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	397	392	385	380	424	419	412	408	447	442	435	430	469	464	458	453	495	491	484	479
Stackmm	572	575	580	583	581	584	589	593	590	593	599	602	599	603	608	611	613	616	622	626
Top tube lengthmm	544	545	547	548	573.4	575	577	578	598	600	602	603	623	625	627	628	653	655	657	658
Seat tube lengthmm	356	356	356	356	394	394	394	394	432	432	432	432	471	471	471	471	509	509	509	509
Head tube lengthmm	100	100	100	100	110	110	110	110	120	120	120	120	130	130	130	130	145	145	145	145
Head tube angle	67.6°	67.1°	66.4°	65.9°	67.6°	67.1°	66.4°	65.9°	67.6°	67.1°	66.4°	65.9°	67.6°	67.1°	66.4°	65.9°	67.6°	67.1°	66.4°	65.9°
Seat tube angle	75.6°	75.1°	74.4°	73.9°	75.6°	75.1°	74.4°	73.9°	75.6°	75.1°	74.4°	73.9°	75.6°	75.1°	74.4°	73.9°	75.6°	75.1°	74.4°	73.9°
Chainstay lengthmm	424	424	426	427	424	424	426	427	424	424	426	427	424	424	426	427	424	424	426	427
Wheelbasemm	1098	1102	1100	1104	1130	1134	1132	1136	1156	1160	1157	1162	1183	1186	1184	1189	1215	1219	1217	1221
Front centermm	674	678	676	678	706	710	707	710	732	736	732	736	759	762	759	763	791	795	792	795
Bottom bracket dropmm	13	10	28	24	13	10	28	24	13	10	28	24	13	10	28	24	13	10	28	24
Bottom bracket heightmm	342	333	327	319	342	333	327	319	342	333	327	319	342	333	327	319	342	333	327	319
Standover heightmm	797	796	792	791	797	796	792	791	797	796	792	791	797	796	792	791	797	796	792	791
Fork rakemm	43	44	45	43	44	45	46	43	44	44	43	43	45	44	44	43	45	44	44	42
Trailmm	100	97	106	106	99	96	105	106	99	97	108	106	98	97	107	106	98	97	107	107
Stack/reach ratio	1.44	1.47	1.51	1.53	1.37	1.39	1.43	1.45	1.32	1.34	1.38	1.40	1.28	1.30	1.33	1.35	1.24	1.26	1.29	1.31

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: 130 mm
Rear travel: 130 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 46
Lowest gear: 18.1 in
Highest gear: 75.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BB86/BB92
Tire width: 2.3″
Wheel material: Aluminum
Wheel size: 27.5″, 26″

Technical analysis

4 measures

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

Front travel

130 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 982 bicycles with this information
Coverage: 96.6% of the class

Lowest gear

18.1 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 964 bicycles with this information
Coverage: 94.8% of the class

Highest gear

75.6 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 964 bicycles with this information
Coverage: 94.8% of the class

Shifting

Mechanical

34 of 1,016 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2019
Sample: 1,016 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.9 km/h
Highest gear: 29.0 km/h

Total gear range 418%

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: 18.1–75.6 gear inches
Class reference (p10–p90): 16.5–92.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2019
Lowest gear: 964 bicycles with this information, 94.8% of the class
Highest gear: 964 bicycles with this information, 94.8% 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 2019 builds
Specification	This bicycle Rocky Mountain Thunderbolt Alloy 30	Rocky Mountain Thunderbolt Alloy 10	Rocky Mountain Thunderbolt Alloy 50	Rocky Mountain Thunderbolt Carbon 50	Rocky Mountain Thunderbolt Carbon 70	Rocky Mountain Thunderbolt Carbon 90 BC Edition
Frame
Frame material	Aluminum	Aluminum	Aluminum	Carbon	Carbon	Carbon
Suspension
Front travel	130 mm	120 mm	130 mm	130 mm	130 mm	140 mm
Rear travel	130 mm	130 mm	130 mm	130 mm	130 mm	140 mm
Drivetrain
Smallest chainring	32	32	32	34	34	34
Largest chainring	32	32	32	34	34	34
Rear sprockets	11	10	11	12	12	12
Smallest sprocket	11	11	11	10	10	10
Largest sprocket	46	46	46	50	50	50
Lowest gear	18.1 in	18.1 in	18.1 in	17.7 in	17.7 in	17.7 in
Highest gear	75.6 in	75.6 in	75.6 in	88.4 in	88.4 in	88.4 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost
Other specifications
Bottom bracket standard	BB86/BB92	Not informed	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92
Tire width	2.3″	2.25″	2.3″	2.3″	2.3″	2.3″
Fork spring	Not informed	Air	Air	Air	Air	Air

Changes since 2018
Specification	2018 Rocky Mountain Thunderbolt Alloy 30	This bicycle Rocky Mountain Thunderbolt Alloy 30
Suspension
Rear travel	120 mm	130 mm
Drivetrain
Largest sprocket	42	46
Lowest gear	21.0 in	18.1 in
Highest gear	80.0 in	75.6 in
Other specifications
Fork spring	Air	Not informed
Wheel size	27.5″	27.5″ / 26″