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2017 Rocky Mountain

Thunderbolt 770 MSL

A 27.5″ carbon frame full suspension trail bike with high-end components.
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Manufacturer Price

$5,299
FrameCarbon
SuspensionFull, 120 / 130mm
ForkFox Performance Elite Float 34
ShockFox Float DPS Factory
Wheels27.5″ Aluminum
GroupsetXT
BrakesShimano XT 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 770 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)

24 mph

Thunderbolt 770 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

None yet.

Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.

Reviews
Enduro Mountainbike Magazine
Rocky Mountain Thunderbolt Carbon 90 BC Edition Review

Dec 2018 · Christoph Bayer

The Rocky Mountain Thunderbolt BC Edition is guaranteed to put a smile on your face: it was by far the most agile bike in this group test.

Highs
  • Very playful

  • Beautiful frame

  • Comfortable suspension

Lows
  • The rear linkage lacks support

  • Nervous at speed

  • Small brake rotors

Read Review

Pinkbike
Review: Rocky Mountain Thunderbolt Carbon 70

Aug 2018 · Mike Levy

Like the other new bikes, you'll find blind pivots on the Thunderbolt that make for some pretty clean lines, as well as sealed bearings all around (including the lower shock mount) that replace the bushing system Rocky used previously.

Highs
  • Playful personality

  • Supple suspension action

  • So much adjustability

Lows
  • Requires more effort to ride fast on difficult trails than a 29er

  • Finicky suspension setup if you want to get the most out of it

  • So much adjustability

Read Review

Dirt Mountainbike
Rocky Mountain Thunderbolt BC Edition

Mar 2018 · James Good

B is for Burly

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.”

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MBR
Rocky Mountain Thunderbolt BC Edition (2016) review - MBR

Mar 2016 · Danny Milner

The Rocky Mountain Thunderbolt BC Edition is an aggressively specced short-travel ripper that we tested on home turf in Canada

Highs
  • With so little mass, it’s easy to chuck about. Black on black build-kit is super-slick

Lows
  • Front end needs to grow by at least 20mm. Suspension performance held back by bushing friction

Read Review

BIKE Magazine
Review: Rocky Mountain Thunderbolt 799 MSL

Feb 2016

Every year, one bike earns the distinction of ‘most ridiculously expensive bike,’ and this year the title went to the Rocky Mountain Thunderbolt 799 MSL.

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

Geometry
Specs
Build
Frame

SMOOTHWALL™ Carbon C13. BC2™ Pivots & Grease Ports. Sealed Cartridge Bearing Main Pivot. Press Fit BB. RIDE-9™ Adjustable Geometry & Suspension Rate. Di2 Ready.

BB StandardBB86/BB92, Press Fit

Fork

Fox 34 Float Performance Elite 130mm

Travel130mm

Spring TypeAir

Shock

Fox Float DPS EVOL Factory 120mm

Travel120mm

Bottom Bracket

Race Face Cinch BB92 Press Fit

Headset

FSA Orbit C-40

Stem

Rocky Mountain 35 AM

Handlebar

Race Face Turbine 760mm

Saddle

WTB Silverado Race SL

Seatpost

RockShox Reverb Stealth 30.9mm

TypeDropper

Grips

Rocky Mountain Lock On XC

Groupset
Rear Derailleur

Shimano XT Direct Mount

Crank

Race Face Turbine Cinch 32T

Shifters

Shimano XT

Cassette

Shimano XT 11-46T

Chain

Shimano HG-700

Brakes

Shimano XT 180mm

TypeShimano XT Hydraulic Disc

Brake Levers

Shimano XT I-Spec II

Wheels
Rims

Stan's ZTR Crest Tubeless Ready

Spokes

WTB 1.8-1.6

Front Hub

Shimano XT Boost 15mm

Rear Hub

Shimano XT 142mm

Tires

Maxxis DHR II 27.5 x 2.3 / Crossmark II 27.5 x 2.25 Folding

Rider Notes
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First added September 9

Last updated April 14

Not listed for 1,880 days