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2015 Rocky Mountain

Thunderbolt 750 MSL

A 27.5″ carbon frame full suspension trail bike with upper mid-range components.
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Manufacturer Price

$4,299
FrameCarbon
SuspensionFull, 120 / 120mm
ForkFox Float 32
ShockFox
Wheels27.5″ Aluminum
Drivetrain2 × 10
GroupsetX9, X7
BrakesShimano SLX Hydraulic Disc
SeatpostDropper
Learn about Rocky Mountain
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Thunderbolt 750 MSL
Other Trail bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

28 mph

Thunderbolt 750 MSL

26 mph

Similar Bikes

Highest gear

(descending)

Sizing
XS

5'1" – 5'6"

SM

5'4" – 5'9"

MD

5'7" – 6'0"

LG

5'10" – 6'3"

XL

6'0" – 6'5"

🐐 Estimated

Rider Fit Notes

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Reviews

Summary

The Rocky Mountain Thunderbolt is a versatile trail bike praised for its lightning-fast handling, efficient suspension, and customizable RIDE-9 geometry. It excels in climbing and offers a playful, aggressive ride, though some reviews note limitations in more technical or aggressive downhill terrain. The bike's lightweight carbon frame and adjustable features make it a favorite among riders seeking a balance between cross-country efficiency and trail capability.

Pros
  • Lightning-fast handling and precision

  • Efficient suspension and excellent climbing traction

  • Customizable RIDE-9 geometry for personalized ride

  • Lightweight carbon frame with durable construction

  • Versatile for various riding styles and terrains

Cons
  • Limited travel for aggressive downhill riding

  • Some models may require frequent maintenance

  • High price tag for top-end models

Key Quotes
This is saying a lot, as the array of bikes we rode in this year’s test was, pound for pound, the strongest bunch in The Bible of Bike Tests’ six-year history.
BIKE Magazine logoBIKE Magazine
The Rocky’s suspension is efficient when climbing and offers excellent traction, but it’s active during out of the saddle exertions.
Bikerumor logoBikerumor
Equally at home on long, technical climbs as it is flowy singletrack descents, it’ll have you powering through the rough stuff and popping off every trail feature you lay eyes on.
Dirt Mountainbike logoDirt Mountainbike

Feedback?

View all reviews

NSMB
Rocky Mountain Thunderbolt: Reviewed

Nov 2016

Don’t let its ‘mere’ 120mm of rear wheel travel or its ‘small’ 27.5″ wheels deceive you – this is a barn-burner of a trail bike.

Read Review

Freehub
Bike Review | Rocky Mountain Thunderbolt BC Edition

Sep 2016 · JC Canfield

The second year of the Rocky Mountain Thunderbolt BC Edition provides us a bike that defies traditional spec and provides adjustable geometry, designed for riders who are looking to push the boundaries of XC. This beefed up version of the Thunderbolt begged to be pushed to its limits. So for two months I sought the ends of the bike’s capability on everything from mellow out-and-back loops to terrain some might deem as “a bad idea” with a short travel bike. I was searching to answer the question of whether this is an XC bike with trail chops, or more of a well rounded trail-slayer, ready to take on the whole mountain. Primarily designed for XC riding, the souped up BC Edition spec includes a pair of 2.4” Maxxis Ardents, Race Face Next carbon bars and a custom-valved Rock Shox Monarch RT3 putting the overall build a little over 26 pounds, which is stupidly light for a bike categorized as “trail.”

Read Review

Enduro Mountainbike Magazine
Rocky Mountain Thunderbolt BC Edition Review

Jul 2016 · Christoph Bayer

As the trail bike storm brews, it’s time to set the scales and verify if the Rocky Mountain Thunderbolt BC Edition lives up the brand’s high standards.

Read Review

Bikerumor
First Impressions: Rocky Mountain Thunderbolt 770 MSL

Jun 2015 · Saris Mercanti

A few years ago when 29ers where still as widely misunderstood as fat bikes, there was a trend of building up mini DH bikes out of four inch travel slopestyle bikes. Those bikes were (and are) about the most the fun you could have on a trail, but they were terrible for racking up miles. …

Read Review

Mountain Bike Action
Bike Test: Rocky Mountain Thunderbolt 770MSL

May 2015 · McCoy

It’ll flow through any section of trail with the right amount of finesse and confidence

Read Review

Dirt Mountainbike
Rocky Mountain Thunderbolt goes carbon for 2015

Aug 2014 · Dirt HQ

Carbon continues to infiltrate every corner of the market, the latest to turn to the black stuff is Rocky Mountain Thunderbolt...

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Canadian Cycling Magazine
Rocky Mountain releases Thunderbolt MSL

Aug 2014 · Charles Bryer

With shorter chainstays, a lower stand-over, additional adjustability and improved pivot technologies the new 2015 carbon Thunderbolt MSL is Rocky

Read Review

BIKE Magazine
2015 Rocky Mountain Thunderbolt MSL preview

Aug 2014

Named after its "lightning-quick agility," the 2015 Rocky Mountain Thunderbolt MSL is said to dominate on a variety of terrain.

Read Review

Geometry
Specs
Build
Frame

SMOOTHWALL™ Carbon. Pipelock™ Main Pivot + BC2™ & ABC™ Bushings. Tapered Head Tube. Press Fit BB. RIDE-9™ Adjustable Geometry & Suspension Rate. Di2 Ready.

Fork

Fox 32 Float 27.5 120 CTD. 120mm. Rebound / Climb (Lockout) - Trail (Compression) - Descend (Open) Settings / 15mm Axle / Tapered Steerer

Travel120mm

Spring TypeAir

Shock

Fox Float Remote CTD Custom Race Valved. SmoothLink™ Design 120mm. Rebound / Remote Climb (Lockout) - Trail (ProPedal) - Descend (Open) Settings / Adjustable Suspension Rate

Travel120mm

Bottom Bracket

Race Face Team XC Press Fit

Headset

Cane Creek Fifteen Series: IS42mm Top / 52mm Bottom Tapered

Stem

Race Face 6° x 60-80mm

Handlebar

Race Face Evolve 1/2 Rise Ø31.8mm x 750mm x 9° Sweep

Saddle

WTB Volt Race

Seatpost

X Fusion HiLo Strate 30.9mm x 420mm

TypeDropper

Pedals

N/A

Grips

Rocky Mountain Lock On XC

Groupset
Rear Derailleur

SRAM X9 Type 2 All Mountain 10spd

Front Derailleur

SRAM X7 S3 Direct Mount 2x10spd

Crank

Race Face Turbine 170-175mm 38/24T 2x10spd

Shifters

SRAM X7 Triggers 2x10spd

Cassette

Shimano HG50 11-36T 10spd

Chain

Shimano HG54 10spd

Brakes

Shimano SLX Hydraulic Disc 180/160mm

TypeShimano SLX Hydraulic Disc

Brake Levers

Shimano SLX I-Spec Shifter Mount

Wheels
Rims

Wheeltech Helix TR25 Tubeless Compatible by SUNringlé

Spokes

DT Swiss Competition

Front Hub

Shimano SLX / Centerlock / 32H / 15mm Axle

Rear Hub

Shimano SLX / Centerlock / 32H / 12 x 142mm Axle

Tires

Maxxis Folding F: Ardent 27.5\" x 2.25\" R: Ardent Race 27.5\" x 2.2\"

Rider Notes
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First added September 9

Last updated April 14

Not listed for 1,886 days