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Today’s DealsThunderbolt 799 MSL
A 27.5″ carbon frame full suspension trail bike with ultra high-end components.
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Manufacturer Price
$11,499| Weight | 24.9 lbs |
|---|---|
| Frame | Carbon |
| Suspension | Full, 120 / 120mm |
| Fork | Fox Float 32 |
| Shock | Fox Float DPS Performance |
| Wheels | 27.5″ Carbon |
| Drivetrain | 2 × 11 Electronic |
| Groupset | XTR Di2 |
| Brakes | Shimano XTR Hydraulic Disc |
| Seatpost | Dropper |
5'1" – 5'6"
5'4" – 5'9"
5'7" – 6'0"
5'10" – 6'3"
6'0" – 6'5"
🐐 Estimated
None yet.
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Summary
The Rocky Mountain Thunderbolt is a versatile trail bike praised for its lightweight design, efficient climbing, and adjustable geometry via the Ride-9 system. It excels in technical terrain with solid suspension performance, though some reviews note limitations in aggressive downhill scenarios due to its 120mm travel. The bike's high-end builds and innovative features like grease ports and Pipelock pivots are highlights, but its premium price and occasional suspension setup challenges are noted drawbacks.
Lightweight and efficient climbing
Adjustable geometry with Ride-9 system
Solid suspension performance
Innovative features like grease ports and Pipelock pivots
High-end build quality
Premium price point
Limited by 120mm travel in aggressive terrain
Suspension setup can be finicky
Requires frequent maintenance for bushings
This bike is built to go fast.
The Rocky’s suspension is efficient when climbing and offers excellent traction, but it’s active during out of the saddle exertions.
It’s designed for our own special blend of XC and trail riders—people who hammer at the pointy end of the pack, but stay aggressive and stylish when terrain gets rougher
Playfulness and Aggression are the name of the game climbing and descending.
Rocky Mountain has gone all in with 27.5 for 2015 like many other companies
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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.
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.”

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.

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
With so little mass, it’s easy to chuck about. Black on black build-kit is super-slick
Front end needs to grow by at least 20mm. Suspension performance held back by bushing friction

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.

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. …

May 2015 · McCoy
It’ll flow through any section of trail with the right amount of finesse and confidence
Sep 2014 · Don Palermini
Rocky Mountain’s Thunderbolt 799 MSL an electrifying XC rig with a shocking price tag. - Mtbr.com
| Frame | Smoothwall Carbon. BC2 Pivots & Grease Ports. Pipelock Main Pivot. Press Fit BB. RIDE-9 Adjustable Geometry & Suspension Rate. Di2 Ready. BB Standard: BB86/BB92, Press Fit |
|---|---|
| Fork | Fox 32 Float Fit4 Adjust Kashima 120mm. Rebound / Firm - Medium - Adjustable Open Settings / Tapered Steerer Travel: 120mm Spring Type: Air |
| Shock | Fox Float DPS Kashima Rear Remote Custom Valved. SmoothLink Design 120mm. Rebound / Remote Firm - Medium - Open Settings Travel: 120mm |
| Bottom Bracket | Race Face Cinch 30mm BB92 Pressfit |
| Headset | FSA Orbit C-40: IS42mm Top / 52mm Bottom Tapered |
| Stem | RMB CNC 35mm 5° x 60-80mm |
| Handlebar | Race Face Next Carbon 1/2 Rise 35mm x 740mm x 9° Sweep |
| Saddle | WTB Silverado Carbon |
| Seatpost | RockShox Reverb Stealth 30.9mm x 350-420mm Type: Dropper |
| Grips | ESI Silicone Super Light |
| Rear Derailleur | Shimano XTR Di2 Shadow Plus Direct Mount 11spd |
|---|---|
| Front Derailleur | Shimano XTR Di2 E Mount 2x11spd |
| Crank | Race Face Next SL 170-175mm 38/28T 2x11spd |
| Shifters | Shimano XTR Switch Shift Di2 2x11spd |
| Cassette | Shimano XTR 11-40T 11spd |
| Chain | Shimano XTR Sil-Tec 11spd |
| Brakes | Shimano XTR Ice Tech Hydraulic Disc 180mm Type: Shimano XTR Hydraulic Disc |
| Brake Levers | Shimano XTR |
| Rims | Stan\'s Valor Carbon Incl Tubeless Kit |
|---|---|
| Spokes | Sapim Laser |
| Front Hub | Stan\'s Neo + / Oversized Stainless Bearings / 15mm Axle |
| Rear Hub | Stan\'s Neo + / Wide Stance Oversized Stainless Bearings / 6 Pawl - 5deg Engagement Alloy Freehub / 12 x 142mm Axle |
| Tires | Maxxis Maxx Speed Tubeless Ready Ardent Race 27.5\" x 2.2\" |
First added September 9
Last updated April 14
Not listed for 1,880 days