Velopedia Bicycle Archive

2021 Rocky Mountain Blizzard 50 (27.5)

Original specifications: 27.5" wheels · geometry for 4 published sizes.

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At a glance

Archive #900004758
Model year
2021
Category
Mountain
Original MSRP
$2,819.00
Sizes
S, M, L, XL
Colors
Purple/Black
Geometry
4 manufacturer sizes
In this record
22 specifications · archived image · original MSRP · geometry
Campaign
Original buildAluminum · 27.5"

Manufacturer catalog

Published sizes and colors

4 sizes · 1 color

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

Published sizes

SMLXL

Published colors

Purple/Black

Frameset

Frame ConstructionRocky Mountain 6061 SL Series Alloy. 100mm BSA BB. Zero Stack Tapered Headtube. Internal Cable Routing. mm Dropper Post Compatible. 197mm Dropouts 0 Rear Triangle
Frame MaterialAluminum
ForkRocky Mountain Carbon Fat
Fork MaterialCarbon Fiber

Drivetrain

ShiftersShimano XT
Rear DerailleurShimano XT
CranksetRace Face Aeffect Cinch 30T
Bottom BracketRace Face BSA 100 24mm
CassetteShimano SLX 10-51T
ChainShimano M6100

Brakes

BrakesShimano MT4120 4 Piston

Cockpit & Contact Points

HeadsetFSA Orbit NO.57E
HandlebarRocky Mountain AM 780mm
StemRocky Mountain 31.8 AM | All Sizes = 40mm
SaddleWTB Volt Race 142
SeatpostRace Face Aeffect R Dropper 30.9mm | XS - SM = 125mm | MD = 150mm | LG - XL - XXL = 175mm

Wheels & Tires

HubsFront: Rocky Mountain Sealed 150 x 15mm; Rear: DT Swiss 350 197mm
RimsSun Mulefüt 80 / Tubeless Ready - Tape / Valves Incl
Spokes2.0 Stainless
Front TireTerrene Cake Eater Fast Rolling Tubeless Studdable 27.5 x 4.5
Rear TireTerrene Cake Eater Fast Rolling Tubeless Studdable 27.5 x 4.5
Wheel Size27.5"

Geometry

4 sizes · 12 measurements

Frame measurements by size.

All geometry measurements4 sizes · 12 measurements
MeasurementSM · 27.5″MD · 27.5″LG · 27.5″XL · 27.5″
Seat tube380 mm420 mm445 mm480 mm
Effective top tube607 mm634 mm661 mm689 mm
Head tube95 mm100 mm110 mm120 mm
Head-tube angle66°66°66°66°
Seat-tube angle73.5°73.5°73.5°73.5°
Chainstay / rear center455 mm455 mm455 mm455 mm
Wheelbase1179 mm1206 mm1235 mm1264 mm
Bottom-bracket drop60 mm60 mm60 mm60 mm
Reach425 mm450 mm475 mm500 mm
Stack615 mm619 mm629 mm638 mm
Standover height786 mm803 mm814 mm825 mm
Wheel size27.527.527.527.5

Dimensions as recorded.

Gearing

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

RPM

RPM = pedal turns per minute.

All published sizes30T · 10–51T
Lowest0.59:1 Highest3.00:1 Total range510%
Estimated speed At 90 RPM Lowest gear5.0 mph Highest gear25.7 mph

Rear tire: 27.5×4.5.

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
Chain · Original
Shimano M6100
Retailer offers
Cassette · Original
Shimano SLX 10-51T
Bottom bracket · Original
Race Face BSA 100 24mm
More parts (5)Fewer parts
Saddle · Original
WTB Volt Race 142
Crankset · Original
Race Face Aeffect Cinch 30T
Rear derailleur · Original
Shimano XT Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
Shifters · Original
Shimano XT Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
Headset · Original
FSA Orbit NO.57E

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.

Bottom bracket / shell
Race Face BSA 100 24mmCheck: Verify shell type and width, crank interface, and spindle length or spacers.

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

Bike-specific inspection checklist 20 checks based on 5 archived component groups Open checklistClose checklist
0 of 20 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 Blizzard 50 (27.5) · Mountain · Published sizes: S, M, L, XL

Archived: Frame: Rocky Mountain 6061 SL Series Alloy. 100mm BSA BB. Zero Stack Tapered Headtube. Internal Cable Routing. mm Dropper Post Compatible. 197mm Dropouts 0 Rear Triangle · Fork: Rocky Mountain Carbon Fat · Carbon Fiber

Archived: Shifters: Shimano XT · Rear derailleur: Shimano XT · Crankset: Race Face Aeffect Cinch 30T · Bottom bracket: Race Face BSA 100 24mm · Cassette: Shimano SLX 10-51T · Chain: Shimano M6100

Archived: Brakes: Shimano MT4120 4 Piston

Archived: Wheel size: 27.5" · Rims: Sun Mulefüt 80 / Tubeless Ready - Tape / Valves Incl · Hubs: Front: Rocky Mountain Sealed 150 x 15mm; Rear: DT Swiss 350 197mm

Controls and contact points

Archived: Headset: FSA Orbit NO.57E · Handlebar: Rocky Mountain AM 780mm · Stem: Rocky Mountain 31.8 AM | All Sizes = 40mm · Seatpost: Race Face Aeffect R Dropper 30.9mm | XS - SM = 125mm | MD = 150mm | LG - XL - XXL = 175mm · Saddle: WTB Volt Race 142

Before and during the test ride

Follow the full used-bike inspection order →

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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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