Rocky Mountain Solo Carbon 70

Rocky Mountain

SoloCarbon 70

Claimed weight19.8 LBS | 9 KGSComplete bike
FrameRocky Mountain Smoothwall…Rocky Mountain Carbon Grave…
GroupsetSram Rival AXSSram XPLR XG-1251 10-44T
WheelsEaston EA70 AX 12 x 100…WTB Venture TCS Light Fast…
Tire clearance50 mm

The Rocky Mountain Solo is a rugged, adventure-oriented gravel platform designed to handle everything from multi-day bikepacking routes to aggressive trail riding. Introduced for the 2023 model year, this generation marks a significant departure from its predecessor by adding a carbon frame option alongside the traditional alloy models. The redesign leans heavily into mountain bike capability, built around massive tire clearance that accommodates up to 29 x 2.0-inch or 650b x 2.2-inch rubber.

Beyond the expanded tire capacity, the frame is engineered for maximum utility. It supports both 1x and 2x drivetrains, includes dropper post routing, and features an extensive array of mounting points across the frame and fork. With frame protection details and mountain-bike-level durability testing, the Solo is positioned for riders who want a single drop-bar bike capable of pushing well past smooth dirt roads into demanding, technical terrain.

Rocky Mountain Solo
Year
Build
Size
01 / Buy

Where to get it.

No retailers stocking size sm.

Size
0 retailers · Size sm

No retailers carrying size sm right now.

02 / Specifications

Spec sheet.

Every component shipped with this build.

01Frameset
3 components
FrameRocky Mountain Smoothwall Carbon | BB386 | Zero Stack Tapered Headtube | Fully Guided Internal Cable Routing | Dropper Post Compatible | 142mm Dropouts | Sram UDH Compatible Rear Triangle
ForkRocky Mountain Carbon Gravel | Full Carbon Steerer | 100 x 12mm Axle | 3 Rack & Fender Mounts
Weight19.8 LBS | 9 KGS
02Drivetrain & brakes
10 components
Shift leversSram Rival AXS
Rear derailleurSram Rival XPLR AXS
ChainSram Rival 12s
Bottom bracketSram BB386 DUB Wide
Front brakeSram Rival
Rear brakeSram Rival
Front rotorSram Paceline 160mm
Rear rotorSram Paceline 160mm
03Wheels & tires
4 components
Front tireWTB Venture TCS Light Fast Rolling 700 x 40c
Rear tireWTB Venture TCS Light Fast Rolling 700 x 40c
04Cockpit & contact
5 components
StemRocky Mountain 31.8 XC | 7° Rise | XS = 60mm | SM = 70mm | MD = 80mm | LG = 90mm | XL = 100mm
SaddleWTB Silverado Race 142
Grips/TapeRocky Mountain Gel Bar Tape
03 / Geometry

Geometry & fit.

5 sizes published.

The Solo’s geometry blends modern gravel trends with subtle mountain bike influences, creating a posture that favors long-distance comfort and rough-terrain control. Across the size range, the head tube is kept relatively short, but a longer fork increases the overall stack height. This results in a slightly more upright, compact seated position that reduces rider fatigue during extended bikepacking trips or multi-hour trail rides.

Handling is dictated by a relatively long wheelbase and a notably low bottom bracket drop of around 75mm to 78mm, depending on the frame size. This low-slung design anchors the rider's weight, prioritizing stability through fast, sweeping corners and loose descents. To maintain agility, Rocky Mountain pairs this long front center with short 425mm chainstays, keeping the rear wheel tucked in for traction on steep climbs and maneuverability through tight singletrack.

The cockpit setup complements the frame's off-road intentions. Most builds feature an Easton handlebar with a moderate 16-degree flare, offering a wider stance for descending control without forcing the brake levers into an awkward, overly angled position.

Reach × Stack · size smmm

Where the handlebar sits relative to the bottom bracket — the single most important fit pair.

660614568521475STACK ↑335358380403425REACH →ENDURANCEFAST / LOWSize sm382.66 · 567.4
01Fit geometry6 values
Stack567.4 mm
Reach382.66 mm
Top tube540 mm
Headtube length130 mm
Standover height787 mm
Seat tube length452 mm
03Handling geometry5 values
Headtube angle70.5°
Seat tube angle74.5°
BB drop77 mm
Wheelbase1034 mm
Chainstay length425 mm

Which size should I buy?

Slide your height to see the recommended size. GearWise's fit algorithm works from the published stack, reach, and ETT — the brand's own recommendation may differ.

Your height
5'8"173 cm
5'0"5'5"5'10"6'3"6'7"
Recommended sizesmBased on stack, reach & ETT for your height · score 59/100.

Calculated from GearWise's own stack / reach / ETT algorithm — the brand's size chart may recommend a different size, and a proper bike fit beats any calculator.

04 / Other builds

The lineup.

4 builds, ranging $1,699 – $5,999.

The Solo lineup is split between premium carbon models and more accessible alloy builds, spanning four primary tiers. The carbon frames feature a sculpted seat tube for added compliance and utilize a BB386 press-fit bottom bracket to maximize rear tire clearance. The alloy frames share the same core geometry and mounting capabilities but carry a slight weight penalty.

At the top end, the Carbon 90 BC Edition and Carbon 70 are equipped with wireless electronic shifting. The Carbon 70 pairs a SRAM Rival AXS XPLR drivetrain with Easton alloy wheels. While the 42-tooth chainring and 10-44 cassette provide a versatile range for general gravel riding, riders planning heavily loaded bikepacking trips in steep terrain may find the stock gearing slightly tall.

The alloy models deliver strong value for budget-conscious riders. The entry-level Alloy 30 features a reliable SRAM Apex 11-speed mechanical drivetrain, though it relies on cable-actuated mechanical disc brakes, which represent a functional but noticeable step down in stopping power compared to the hydraulic systems found higher up the ladder. Across all builds, the stock 40mm tires are competent, but the frames are clearly designed to accommodate much wider rubber.

01
Carbon 90 BC Edition build
2025Carbon 90 BC Edition
$5,999
02
Carbon 70 build
2023 · Currently viewingCarbon 70
$4,999On this page
03
Alloy 50 build
2024Alloy 50
$2,499
04
Alloy 30 build
2024Alloy 30
$1,699
05 / Reviews

From the press.

4 reviews from the cycling press.

Reviewers consistently praise the Rocky Mountain Solo for its balanced, highly capable ride feel across a wide spectrum of off-road conditions. The frame’s mountain-bike-inspired geometry translates to excellent high-speed stability, with testers noting it delivers "stable, confident riding on flat bumpy terrain and high-speed descents" (Cxmagazine). Despite this planted demeanor, the bike remains surprisingly responsive in tight sections. The carbon model feels "quite agile and handy" (Velomotion) on singletrack, while the entry-level alloy version "climbs like a billy goat" (YouTube) when pointed up steep pitches.

The most common critique centers on the low bottom bracket, which can lead to pedal strikes in technical terrain when running the stock 40mm tires. However, testers largely forgave this trait, finding that the "lower center of gravity is worth the occasional pedal strike" (Cxmagazine) for the cornering benefits it provides.

To realize the platform's full potential, reviewers universally recommend taking advantage of the massive frame clearance. Swapping the stock rubber for 45mm gravel tires or 2.2-inch mountain bike treads dramatically improves vibration damping and traction. While the carbon frame’s sculpted seat tube offers noticeable compliance, maximizing tire volume is the agreed-upon method for smoothing out the roughest adventure routes.

06 / Compared to

Compared to.

Most-viewed comparisons.