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Today’s DealsThunderbolt 770 MSL
A 27.5″ carbon frame full suspension trail bike with high-end components.
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Manufacturer Price
$5,299| Frame | Carbon |
|---|---|
| Suspension | Full, 120 / 130mm |
| Fork | Fox Performance Elite Float 34 |
| Shock | Fox Float DPS Factory |
| Wheels | 27.5″ Aluminum |
| Groupset | XT |
| Brakes | Shimano XT 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.
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.

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.
Very playful
Beautiful frame
Comfortable suspension
The rear linkage lacks support
Nervous at speed
Small brake rotors

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.
Playful personality
Supple suspension action
So much adjustability
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
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.”

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
| 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 Standard: BB86/BB92, Press Fit |
|---|---|
| Fork | Fox 34 Float Performance Elite 130mm Travel: 130mm Spring Type: Air |
| Shock | Fox Float DPS EVOL Factory 120mm Travel: 120mm |
| 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 Type: Dropper |
| Grips | Rocky Mountain Lock On XC |
| 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 Type: Shimano XT Hydraulic Disc |
| Brake Levers | Shimano XT I-Spec II |
| 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 |
First added September 9
Last updated April 14
Not listed for 1,880 days