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2018 Rocky Mountain

Thunderbolt Carbon 50

A 27.5″ / 26″ carbon frame full suspension trail bike with high-end components.
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Manufacturer Price

$4,499
Weight27.0 lbs  
FrameCarbon
SuspensionFull, 130 / 130mm
ForkFox Performance Float 34
ShockFox Float DPS Performance
Wheels27.5″ / 26″ Aluminum
Drivetrain1 × 12
GroupsetGX Eagle, Truvativ Stylo
BrakesSRAM Level TL Hydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Thunderbolt Carbon 50
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)

26 mph

Thunderbolt Carbon 50

26 mph

Similar Bikes

Highest gear

(descending)

Reviews

Summary

The Rocky Mountain Thunderbolt is celebrated for its playful handling, versatile Ride-9 adjustable geometry, and improved suspension performance, making it a standout trail bike. Its design caters to aggressive trail adventures with a balance of efficiency and fun. However, some reviews note it requires more effort on difficult trails compared to 29ers and has a finicky suspension setup.

Pros
  • Playful and quick handling

  • Versatile Ride-9 adjustable geometry

  • Improved suspension performance

  • Lightweight and stylish design

  • Internal cable routing and sealed bearings

Cons
  • Requires more effort on difficult trails than 29ers

  • Finicky suspension setup

  • Not as settled at high speeds or rough ground

  • Increased bottom-bracket drop leads to pedal strikes

Key Quotes
I couldn’t have chosen a better bike for the job.
BIKE Magazine logoBIKE Magazine
It may only look slightly different from its predecessor, but it is an entirely new beast.
Bikerumor logoBikerumor
Born out of BC, Rocky Mountain have revealed a revised, gravity friendly version of the Thunderbolt for 2018.
Dirt Mountainbike logoDirt Mountainbike

Feedback?

View all reviews

Loam Wolf
Review: Rocky Mountain Thunderbolt Carbon 90

Oct 2019

The Thunderbolt is for an experienced rider who wants to ride a rocket ship. A rider who knows how to get out of trouble quickly because rocket ships are hard to control. Get our full take on the Rocky Mountain Thunderbolt Carbon 90 BC Edition here!

Read Review

MTB Mag
[Tested] Rocky Mountain Thunderbolt Alloy 50

May 2019 · Simon Silver

This Winter we tested the $3,349 Rocky Mountain Thunderbolt Alloy 50 trail bike. For an entry level spec’d bike we were quickly impressed with the attention to detail, and features the frame sported. Video review below. Details & Specs • 27.5″ wheels • 130mm travel front and rear • Boost hub spacing •RIDE-9™ Adjustable Geometry + Suspension Rate • Aluminum front and rear triangle • Press Fit BB • Sealed cartridge bearing pivots • XS, S, M (tested), L, XL sizes The bike is fairly well refined, with a Race Face Crankset, and direct mount ring, internal cable routing, built

Read Review

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

Bikerumor
Long Term Review: The all-new Rocky Mountain Thunderbolt Carbon 50

Jul 2018 · Christophe Noel

We spent the last three months testing the new Rocky Mountain Thunderbolt Carbon 50.

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BIKE Magazine
Tested: Rocky Mountain Thunderbolt BC Edition

May 2018

The Rocky Mountain Thunderbolt BC Edition might be called an XC bike, but it has other intentions when on the trail.

Read Review

Singletrack World
UK Exclusive First Ride Review: We test the 2019 Rocky Mountain Thunderbolt

Mar 2018 · Antony de Heveningham

We managed to get an exclusive first ride on Rocky Mountain's brand new Thunderbolt, a super versatile 140mm superbike

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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

Geometry
Specs
Build
Frame

SMOOTHWALL™ Carbon. Full Sealed Cartridge Bearings. Press Fit BB. Internal Cable Routing. 2-Bolt ISCG05 Tabs. RIDE-9™ Adjustable Geometry + Suspension Rate / SMOOTHWALL™ rear triangle

BB StandardBB86/BB92, Press Fit

Fork

Fox 34 Float Performance 130mm

Travel130mm

Spring TypeAir

Shock

Fox Float DPS EVOL Performance

Travel130mm

Bottom Bracket

SRAM GXP BB92

Headset

FSA Orbit NO.57E

Stem

Rocky Mountain AM

Handlebar

Rocky Mountain AM 760mm

Saddle

WTB Volt Race

Seatpost

Fox Transfer Performance Elite 30.9mm

TypeDropper

Grips

Rocky Mountain Lock On Light

Groupset
Rear Derailleur

SRAM GX Eagle

Crank

SRAM Stylo 6k Eagle 34T

Shifters

SRAM GX Eagle

Cassette

SRAM XG-1275 10-50T

Chain

SRAM GX Eagle

Brakes

SRAM Level TL

TypeSRAM Level TL Hydraulic Disc

Wheels
Rims

Sun Helix TR25 SL Tubeless Ready - Tape | Valves Incl

Spokes

WTB 2.0-1.8

Front Hub

Rocky Mountain Sealed Boost 15mm

Rear Hub

DT Swiss 370 Boost 148mm

Tires

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

Rider Notes
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First added September 9

Last updated April 14

Not listed for 1,886 days