Velopedia Bicycle Archive

2021 Rocky Mountain Fusion 10

Original specifications: 29" wheels · 30.58 LBS|13.9 KGS published weight · geometry for 4 published sizes.

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At a glance

Archive #900004821
Model year
2021
Category
Mountain
Original MSRP
$779.00
Sizes
S, M, L, XL
Colors
Black/Green, Grey/Black
Weight
30.58 LBS|13.9 KGS
Geometry
4 manufacturer sizes
In this record
21 specifications · 2 archived images · original MSRP · geometry
Model history 2 other years

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Identification clues

2021 archived details

Published colors
Black/Green, Grey/Black
Frame
Aluminum

Clues, not proof of model year. Colors vary and components may have been replaced.

Campaign
Original buildAluminum · 29"

Manufacturer catalog

Published sizes and colors

4 sizes · 2 colors

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

SMLXL

Published colors

Black/GreenGrey/Black

Frameset

Frame ConstructionRocky Mountain 6061 Alloy. Threaded BB. Zero Stack Tapered Headtube 0 Rear Triangle
Frame MaterialAluminum
ForkSuntour XCM 100mm

Drivetrain

ShiftersShimano Altus
Rear DerailleurShimano Altus Shadow
CranksetRocky Mountain Microdrive 28T
Bottom BracketSealed Cartridge Bearing
CassetteSunRace CSM980 11-40T
ChainKMC X10-1

Brakes

BrakesTektro HD-M275 | Shimano Pad Compatible | 180mm F Rotor | 180mm R Rotor

Cockpit & Contact Points

HeadsetFSA No. 57B-1
HandlebarRocky Mountain XC 740mm
StemRocky Mountain XC
SaddleWTB Volt 142
SeatpostRocky Mountain 30.9mm

Wheels & Tires

HubsFront: Shimano TX505; Rear: Shimano TX505
RimsRocky Mountain TR25 Tubeless / Tubeless Compatible - Tape / Valves / Sealant Not Incl
Spokes2.0 Stainless
Front TireWTB Ranger Comp 29 x 2.25
Rear TireWTB Ranger Comp 29 x 2.25
Wheel Size29"

Geometry

4 sizes · 12 measurements

Frame measurements by size.

All geometry measurements4 sizes · 12 measurements
MeasurementSM · 29″MD · 29″LG · 29″XL · 29″
Seat tube380 mm420 mm445 mm480 mm
Effective top tube589 mm616 mm643 mm671 mm
Head tube95 mm100 mm110 mm120 mm
Head-tube angle66.5°66.5°66.5°66.5°
Seat-tube angle74.5°74.5°74.5°74.5°
Chainstay / rear center445 mm445 mm445 mm445 mm
Wheelbase1153 mm1180 mm1209 mm1238 mm
Bottom-bracket drop60 mm60 mm60 mm60 mm
Reach425 mm450 mm475 mm500 mm
Stack593 mm598 mm607 mm616 mm
Standover height763 mm776 mm786 mm801 mm
Wheel size29292929

Dimensions as recorded.

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

RPM

RPM = pedal turns per minute.

All published sizes28T · 11–40T
Lowest0.70:1 Highest2.55:1 Total range364%
Estimated speed At 90 RPM Lowest gear5.4 mph Highest gear19.8 mph

Rear tire: 29×2.25.

How it works

Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

Try other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Your gearing setup
Gears

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Gear, dimension and cadence changes update results automatically.

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications
Seatpost · Original
Rocky Mountain 30.9mm
Retailer offers
Cassette · Original
SunRace CSM980 11-40T
Front tire · Original
WTB Ranger Comp 29 x 2.25
More parts (4)Fewer parts
Saddle · Original
WTB Volt 142
Rear derailleur · Original
Shimano Altus Shadow
Shifters · Original
Shimano Altus
Headset · Original
FSA No. 57B-1

Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.

Service essentialsQuick reference before buying parts

Archived specifications for reference. Check the fitted parts before ordering.

Seatpost diameter
30.9 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
Bottom bracket / shell
Sealed Cartridge BearingCheck: Verify shell type and width, crank interface, and spindle length or spacers.

Not confirmed in this record: Front tire · Rear tire · Drivetrain. Check the fitted parts for these details.

Bike-specific inspection checklist 21 checks based on 6 archived component groups Open checklistClose checklist
0 of 21 checked Progress stays in this browser for this record.

This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.

Archived: 2021 Rocky Mountain Fusion 10 · Mountain · Published sizes: S, M, L, XL

Archived: Frame: Rocky Mountain 6061 Alloy. Threaded BB. Zero Stack Tapered Headtube 0 Rear Triangle · Fork: Suntour XCM 100mm

Archived: Fork: Suntour XCM 100mm

Archived: Shifters: Shimano Altus · Rear derailleur: Shimano Altus Shadow · Crankset: Rocky Mountain Microdrive 28T · Bottom bracket: Sealed Cartridge Bearing · Cassette: SunRace CSM980 11-40T · Chain: KMC X10-1

Archived: Brakes: Tektro HD-M275 | Shimano Pad Compatible | 180mm F Rotor | 180mm R Rotor

Archived: Wheel size: 29" · Rims: Rocky Mountain TR25 Tubeless / Tubeless Compatible - Tape / Valves / Sealant Not Incl · Hubs: Front: Shimano TX505; Rear: Shimano TX505

Controls and contact points

Archived: Headset: FSA No. 57B-1 · Handlebar: Rocky Mountain XC 740mm · Stem: Rocky Mountain XC · Seatpost: Rocky Mountain 30.9mm · Saddle: WTB Volt 142

Before and during the test ride

Follow the full used-bike inspection order →

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Gallery2 images

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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