Rocky Mountain Altitude 650b / 27.5 Trail Bike – A Closer Look

27.5 Sea Otter Classic

Rocky Mountain Altitude 770 MSL 650b Trail Bike

Our crew has been paying a lot of attention to 650b bikes lately. And for good reason – it looks like the 27.5-inch wheel is poised to roll over (see what I did there?) other wheel sizes and become the standard for aggressive trail riding and enduro racing. One bike that has been missing from most of our 650b coverage is the 2013 Rocky Mountain Altitude. That’s too bad because it looks like a top-level competitor. It has a light carbon frame, 150mm of travel, great trail geometry and Rocky Mountain’s “SmoothLink” suspension, which they say “delivers active bump absorption without compromising pedaling efficiency.” I’m actually in the market for a new bike so I made a point of visiting the Rocky Mountain booth at Sea Otter so I could get a closer look at the new 650b Altitude. I wasn’t able to ride the bike but I did get more information along with a bunch of photos. I also got us set up for an Altitude review in the near future, so keep your eyes open for that.

One of the things that set the Rocky Mountain Altitude apart when it was introduced in 2009 is its “StraightUp Geometry;” essentially, a steep seat tube angle that makes the bike a lot more comfortable on the climbs. The 2013 design adds adjustable geometry via an eccentric linkage system Rocky calls Ride-9. It has two nested “chips” on the shock mount that can be rotated for nine different geometry positions. The head tube angle is adjustable from 66.6 to 68.3 degrees, the seat tube can be set from 73.6 to 75.3 degrees, and the bottom bracket height can be tweaked plus or minus about 6mm. The Ride-9 system complements the Altitude’s StraightUp Geometry by allowing the rider to fine-tune the geometry to perfectly fit their riding style – or totally screw it up.

Ride-9 Adjustable Linkage On Rocky Mountain Altitude 650b Bike

Rocky Mountain Altitude Eccentric Shock Mount

The 2013 Rocky Mountain Altitude looks like it splits the difference between the new Santa Cruz Bronson (Santa Cruz Bronson review) and the Norco Sight Killer B (Norco Sight Killer B review), two of the Mtbr test team’s current 650b favorites, which have 160mm and 140mm of travel, respectively. The Norco has a 67.5-degree head tube angle and 70-degree seat tube angle; and the Santa Cruz measures 67 degrees at the head tube with a climb-friendly 73-degree seat tube angle. With the Ride-9 system, you can make the Altitude’s head tube angle either slacker (by 0.4 degrees) or steeper than the Norco Sight and the Santa Cruz Bronson. And the Altitude’s slackest seat tube angle (73.6 degrees) is steeper and better for climbing than both the Santa Cruz and the Norco. Accurate frame weights are hard to come by but according to my Rocky Mountain source, the top-of-the-line Altitude 790 MSL frame is considerably lighter than the Santa Cruz Bronson. The guys at Rocky compared the Altitude to the Bronson with a comparable shock and hardware and it weighed almost 400 grams less (about 3/4 of a pound). Light weight isn’t everything, though. We’ll have to get some actual saddle time on the Altitude before we can really pass judgment. Check the specs table below to see how the Altitude’s geometry matches up with the Santa Cruz Bronson and the Norco Sight.

Rocky Mountain Altitude Geometry Specs Comparison

Our friend Lee Lau did get a chance to preview the Altitude in Whistler, BC, when it was introduced, last summer. His initial impressions of the Altitude along with a video of the bike in action are here. I’m really looking forward to riding one myself as well as seeing what Francis has to say about it after he gets one for review, since he’s gotten to ride most of the current 650b bikes. Check out our 650b All Mountain Bike Round Up article for more information on available 650b bikes and the pros and cons of the 27.5-inch wheel size.

All-Carbon Rocky Mountain Altitude 790 MSL 650b Bike

Rocky Mountain sells the Altitude complete, at five different spec levels. The 730 and 750 have hydroformed aluminum frames, the 750 MSL and 770 MSL have carbon front triangles with aluminum rears, and the 790 MSL is all carbon. Prices range from $2850 for the aluminum 730 MSL, to $5400 for carbon and aluminum 770 MSL, and $6900 for the completely pimped-out, top-of-the-line 790 MSL. The 790 MSL is also available as a frame-only for $2800.

Rocky Mountain Altitude 650b / 27.5 Trail Bike – A Closer Look Gallery
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Rocky Mountain Altitude 770 MSL 650b - Wide Angle
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Rocky Mountain Altitude 770 MSL 650b - Wide Angle

All-Carbon Rocky Mountain Altitude 790 MSL 650b Bike
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All-Carbon Rocky Mountain Altitude 790 MSL 650b Bike

Rocky Mountain's top-of-the-line, all-carbon fiber Altitude 790 MSL 650b trail bike, in the SRAM booth at the 2013 Sea Otter Classic.
Rocky Mountain Altitude 770 MSL 650b Top Tube
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Rocky Mountain Altitude 770 MSL 650b Top Tube

650b Wheel On The 2013 Rocky Mountain Altitude
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650b Wheel On The 2013 Rocky Mountain Altitude

Rocky Mountain Altitude 770 MSL 650b - Front End
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Rocky Mountain Altitude 770 MSL 650b - Front End

Rocky Mountain Altitude 770 MSL 650b - Shock Linkage
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Rocky Mountain Altitude 770 MSL 650b - Shock Linkage

Rocky Mountain Altitude Eccentric Shock Mount
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Rocky Mountain Altitude Eccentric Shock Mount

Rotating the two eccentric "chips" in the front shock mount on Rocky Mountain's Altitude 650b bike allows for nine different geometry configurations, adjusting both the head tube and seat tube angles.
Close-Up: Ride-9 Adjustable Shock Mount On The 2013 Rocky Mountain Altitude
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Close-Up: Ride-9 Adjustable Shock Mount On The 2013 Rocky Mountain Altitude

Rocky Mountain Altitude 790 MSL 650b With SRAM XX1 Drivetrain
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Rocky Mountain Altitude 790 MSL 650b With SRAM XX1 Drivetrain

Rear triangle of Rocky Mountain's top-of-the-line, all-carbon Altitude 790 MSL 650b bike, equipped with a SRAM XX1 drivetrain - seen in SRAM's 2013 Sea Otter Classic booth.
Rocky Mountain Altitude 790 MSL - SRAM XX1 Cogset & Derailleur
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Rocky Mountain Altitude 790 MSL - SRAM XX1 Cogset & Derailleur

SRAM XX1 cogset and derailleur on the new, all-carbon Rocky Mountain Altitude 790 MSL 650b bike - seen in SRAM's 2013 Sea Otter Classic booth.
Ride-9 Adjustable Linkage On Rocky Mountain Altitude 650b Bike
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Ride-9 Adjustable Linkage On Rocky Mountain Altitude 650b Bike

Rocky Mountain's Ride-9 adjustable shock linkage on the Altitude 650b bike allows for 9 different geometry configurations by rotating the square "chips" on the front shock mount.
2013 Rocky Mountain Altitude 650b - Rear View
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2013 Rocky Mountain Altitude 650b - Rear View

2013 Rocky Mountain Altitude 770 MSL 650b Bike - Rear Triangle
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2013 Rocky Mountain Altitude 770 MSL 650b Bike - Rear Triangle

The Rocky Mountain Altitude 770 MSL has an aluminum rear triangle and a carbon fiber front triangle. The top-of-the-line Altitude 790 MSL is carbon fiber, front and back.
Rocky Mountain Altitude 770 MSL 650b Trail Bike
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Rocky Mountain Altitude 770 MSL 650b Trail Bike

Rocky Mountain Altitude 770 MSL 650b - Front Angle
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Rocky Mountain Altitude 770 MSL 650b - Front Angle

Rocky Mountain Altitude Geometry Specs Comparison
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Rocky Mountain Altitude Geometry Specs Comparison

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About the author: John Shafer

John Shafer, a.k.a. Photo-John, is a photographer, cyclist, skier and general outdoor lover. He’s happiest when he’s on his bike or skis, taking pictures in the backcountry. He’s been on the Mtbr team since 1999 running PhotographyREVIEW.com as well as contributing photos and articles on Mtbr. John has been taking pictures since college and believes everyone can be a good photographer if they just learn a few simple rules. He loves big mountains, rocky singletrack, powder days, 6-inch trail bikes, coffee and tacos. Look for him pushing his bike uphill, carrying an inappropriate amount of camera gear in an overloaded backpack.


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  • Skidad says:

    It should be noted that the effective seat tube angle on the Sight Killer B varies from X-small to XL as follows 74.9 74.6 74.2 73.9 73.5. They all share the same 70 degree actual angle.

    The Bronson is a 150mm travel bike not 160mm like stated

    Also MIA in the MTBR 650B testing is the new Banshee Spitfire V2 so come on guys go find one of those to test as well. Seems to have slipped under the radar for some unknown reason. Cool bike with adjustable geometry as well and can run 26″ or 650B wheels using different dropouts.

  • dirtydoug says:

    Double check the altitude bb numbers too they don’t seem to match up with other info out there. Rocky better make another run of these. Quick!

  • David says:

    400g less than Bronson frame? I’ll have to see it to believe it. I’d say 100g for the bushings but add some for the ride9. I’d say 50g tops. 400g would mean this frame weighs 4.5lbs.

  • Haywood says:

    Their element frames are incredibly light (~4.5lbs…can’t remember exactly), so I wouldn’t be surprised if this one is light as well.

  • Lanse says:

    Wow, I tried a 770msl on one of my favourite trails tonight, it was unreal! I wasn’t as tired as I normally am on the climb. You just take off and pull away on the flats and the downhill? I thought this would be the bikes weakness but I descended faster than I ever have on that trail; berms no problem. I was looking at the bronson but at 29lbs for the 750msl I might pull the trigger on that.

    Cheers

  • eric says:

    Hey guys. Just wondering if someone that has ridden this bike could give me a little info. I AM buying one of these this week. But I just cant decide on what size to get. The LARGE (23.8 top tube) or X-LARGE (24.8 top tube) . I’m 5-11, 200 lbs. Been riding a 29er with a *Large ( 24.4 top tube length, travel 130mm). I was wondering with this being a different size wheel and 20mm more travel should I stick with riding a large even though its shorter on paper or bump up to the XL with the shorter stem. I’m torn. Living in SW Arkansas our trails here are not like on the rocky mountain videos. Mostly technical XC style riding so I didn’t know if I should go up or down in size. My question is. Do these frames run big or run small???

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