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Rocky Mountain Thunderbolt 770

Rocky Mountain Thunderbolt 770
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Rocky Mountain's Thunderbolt 770 is the bike for when XC gets rowdy. Every rider loves a light, efficient bike, and the Thunderbolt is certainly that thanks to a hydroformed aluminum frame with Smoothlink rear suspension and its pro parts spec. But it's so much more than an XC race bike with its relatively slack head angle, 120mm of plush Fox travel, wide bars and 27.5-inch wheels. The Thunderbolt takes to the air easily, wheelies like Evil Knievel, and rolls over chunder like the boss that it is. Those specs we talked about? How about Stan's tubeless wheels and XT/XTR gearing with XT discs? Not enough? Fine. A Race Face cockpit and cranks, as well as Continental rubber maximize the ups and downs. Now, let's get rowdy.

Rocky Mountain's Smoothlink suspension places the rear chainstay pivot above the rear axle, keeping the chain torque line parallel to the linkage. The benefit? The rear suspension is always active, bob-free, and delivers a wonderful bottomless feel, no matter what gear you're in.  

Rocky Mountain's FORM tubing pushes the limits of tube and frame design to create their unique riding feel. Every detail of the FORM frame-tube design has a purpose, from the outer shape and profile, to the wall thickness, tapers, flares and bends. This attention to detail, paired with premium materials and manufacturing processes, allows Rocky Mountain to push the boundaries of bicycle design.

Rocky Mountain's Angular Bushing Concept (ABC) pivots consist of an angular contact bushing (yellow) which rotates on a tapered alloy pivot. Carefully controlled tolerances eliminate binding on the pivot for smooth suspension movement. And, they are extra light and increase rear end stiffness by eliminating play.


Frame RMB FORM hydroformed 7005-aluminum
Fork Fox Float 32 FIT CTD, 120mm-travel
Rear Shock Fox Float CTD custom valved w/remote, 120mm-travel
Rims/Wheels Stan's ZTR CRest
Hubs Shimano Deore XT
Tires Continental X King, 27.5 x 2.2
Crankset Race Face Turbine
Chainrings 38/24
Front Derailleur Shimano Deore XT
Rear Derailleur Shimano XTR Shadow Plus
Rear Cogs Shimano Deore XT, 10-speed: 11-36
Shifters Shimano Deore XT
Handlebars Race Face Turbine 3/4 Rise, 725mm
Tape/Grips Rocky Mountain Lock-on XC
Stem Race Face Turbine
Brake Levers Shimano Deore XT
Brakes Shimano Deore XT disc, 7/6-inch rotors
Saddle WTB Silverado Race SL
Seatpost Race Face Turbine

* Subject to change without notice.


FOX CTD Suspension System Introduction

Part Numbers

Option UPC MPN
X-Small 770416162707 CRF410151
Small 770416162738 CRF410161
Medium 770416162769 CRF410181
Large 770416162790 CRF410191
X-Large 770416162820 CRF410201