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Rocky Mountain Thin Air

Rocky Mountain Thin Air
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Rocky Mountain's Thin Air gives you the freedom to ride the way you want. Rocky's ST3 frame design and 6061-aluminum makes for a quick, light and super-maneuverable ride you'll love. The hill-topping 30-speed Shimano drivetrain makes molehills out of mountains and the 100mm RockShox fork smooths out whatever hits you find along the way. Up or down, the Alex wheels shod in Maxxis rubber are ready for speed in all conditions. And, maybe best of all, Shimano hydraulic disc brakes give great stopping power and modulation and the Easton stem, bar and seatpost are ready for almost anything.

Traditional frame geometry doesn't cut it on the steep descents and tight-turning singletrack of southern British Columbia. To help tame this rugged landscape (and yours) Rocky Mountain developed ST3 Geometry (Sloping Top Tube Technology). A sloping top tube means increased frame stiffness and strength, and when things aren't going so well, more stand-over height for easy dismounts. The design also creates a compact front end, increasing agility and stiffness for greater control in all conditions. It also increases frame strength by separating the top tube/seat tube and seat tube/seatstay welds. Originated by Rocky Mountain and copied by others, ST3 delivers a better handling, stronger frame. It's the ride of a lifetime.


Frame RMB custom 6061-aluminum
Fork RockShox Rcon Gold TK Solo Air w/lockout, 100mm-travel
Rims/Wheels Alex DP20
Hubs Shimano RM435
Spokes 14g stainless-steel
Tires Maxxis Ikon, 26 x 2.2-inch
Crankset Shimano M552
Chainrings 44/32/22
Front Derailleur Shimano Deore
Rear Derailleur Shimano XT Shadow
Rear Cogs Shimano, 10-speed: 11-32
Shifters Shimano Deore
Handlebars Easton Lo Rise
Tape/Grips RMB XC Kraton
Stem Easton
Brake Levers Shimano Deore
Brakes Shimano Deore, hydraulic disc
Pedals Platform
Saddle SDG Bel Air RL
Seatpost Easton

* Subject to change without notice.

Part Numbers

Option UPC MPN
15-inch 770416139655 CRH221151
16.5-inch 770416139662 CRH221161
18-inch 770416139679 CRH221181
19-inch 770416139686 CRH221191
20.5-inch 770416139693 CRH221201