Velopedia Bicycle Archive

2021 Rocky Mountain Altitude Carbon 90 Rally Edition

Original specifications: 29"; 27.5" wheels · 32.34 LBS|14.7 KGS published weight · geometry for 4 published sizes.

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At a glance

Archive #900004612

Model year: 2021
Category: Mountain
Original MSRP: $9,499.00
Sizes: S, M, L, XL
Colors: Purple/Black, Black/Brown
Weight: 32.34 LBS|14.7 KGS
Geometry: 4 manufacturer sizes
In this record: 19 specifications · 3 archived images · original MSRP · geometry

Model history 1 other year

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Identification clues

2021 archived details

Published colors: Purple/Black, Black/Brown
Frame: Carbon Fiber

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

Original buildCarbon Fiber · 29"; 27.5"

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

Purple/BlackBlack/Brown

Frameset

Frame Construction	SMOOTHWALL™ Carbon. Full Sealed Cartridge Bearings. Press Fit BB. Internal Cable Routing. 2-Bolt ISCG05 Tabs. RIDE-9™ Adjustable Geometry. 2 Position Axle. 160mm Travel. SMOOTHWALL™ Carbon Rear Triangle
Frame Material	Carbon Fiber
Fork	Fox 38 Float EVOL GRIP2 Factory Series 170mm \| 27.5 = 37mm Offset \| 29 = 44mm Offset
Rear Shock	Fox Float X2 Factory \| Sealed Bearing Eyelet \| SM = 210x55mm \| MD - LG - XL = 230x60mm

Drivetrain

Shifters	Shimano XTR
Rear Derailleur	Shimano XTR
Crankset	Shimano XTR \| 27.5 = 34T \| 29 = 32T
Bottom Bracket	Shimano SM-BB71
Cassette	Shimano XTR 12s 10-51T
Chain	Shimano XTR 12s

Brakes

Brakes	Shimano XTR Trail 4 Piston

Cockpit & Contact Points

Headset	FSA Orbit NO.57E
Handlebar	Race Face Next R 780mm
Stem	Race Face Turbine R \| 40mm
Saddle	WTB Volt Race 142
Seatpost	Race Face Turbine R (by Fox) Dropper 30.9mm \| SM = 125mm \| MD = 150mm \| LG - XL = 175mm

Wheels & Tires

Front Tire	Maxxis Minion DHF 2.5 WT 3C MaxxGrip DD Tubeless Ready
Rear Tire	Maxxis Minion DHR II 2.4 WT 3C MaxxGrip DD Tubeless Ready
Wheel Size	29"; 27.5"

Geometry

4 sizes · 12 measurements

Frame measurements by size.

All geometry measurements45 size / setup combinations · 12 measurements

Measurement	MD · 29″ · POS.1 Slack	LG · 29″ · POS.1 Slack	XL · 29″ · POS.1 Slack	MD · 29″ · POS.2	LG · 29″ · POS.2	XL · 29″ · POS.2	MD · 29″ · POS.3	LG · 29″ · POS.3	XL · 29″ · POS.3	MD · 29″ · POS.4	LG · 29″ · POS.4	XL · 29″ · POS.4	MD · 29″ · POS.5 Neutral	LG · 29″ · POS.5 Neutral	XL · 29″ · POS.5 Neutral	MD · 29″ · POS.6	LG · 29″ · POS.6	XL · 29″ · POS.6	MD · 29″ · POS.7	LG · 29″ · POS.7	XL · 29″ · POS.7	MD · 29″ · POS.8	LG · 29″ · POS.8	XL · 29″ · POS.8	MD · 29″ · POS.9 Steep	LG · 29″ · POS.9 Steep	XL · 29″ · POS.9 Steep	SM · 27.5″ · POS.1 Slack	MD · 27.5″ · POS.1 Slack	SM · 27.5″ · POS.2	MD · 27.5″ · POS.2	SM · 27.5″ · POS.3	MD · 27.5″ · POS.3	SM · 27.5″ · POS.4	MD · 27.5″ · POS.4	SM · 27.5″ · POS.5 Neutral	MD · 27.5″ · POS.5 Neutral	SM · 27.5″ · POS.6	MD · 27.5″ · POS.6	SM · 27.5″ · POS.7	MD · 27.5″ · POS.7	SM · 27.5″ · POS.8	MD · 27.5″ · POS.8	SM · 27.5″ · POS.9 Steep	MD · 27.5″ · POS.9 Steep
Seat tube	420 mm	445 mm	480 mm	420 mm	445 mm	480 mm	420 mm	445 mm	480 mm	420 mm	445 mm	480 mm	420 mm	445 mm	480 mm	420 mm	445 mm	480 mm	420 mm	445 mm	480 mm	420 mm	445 mm	480 mm	420 mm	445 mm	480 mm	380 mm	420 mm	380 mm	420 mm	380 mm	420 mm	380 mm	420 mm	380 mm	420 mm	380 mm	420 mm	380 mm	420 mm	380 mm	420 mm	380 mm	420 mm
Effective top tube	611 mm	640 mm	673 mm	611 mm	639 mm	672 mm	610 mm	639 mm	672 mm	610 mm	639 mm	672 mm	610 mm	638 mm	671 mm	609 mm	638 mm	671 mm	609 mm	638 mm	671 mm	609 mm	637 mm	670 mm	608 mm	637 mm	670 mm	580 mm	607 mm	580 mm	607 mm	579 mm	606 mm	579 mm	606 mm	579 mm	603 mm	578 mm	605 mm	578 mm	—	578 mm	605 mm	577 mm	605 mm
Head tube	95 mm	110 mm	125 mm	95 mm	110 mm	125 mm	95 mm	110 mm	125 mm	95 mm	110 mm	125 mm	95 mm	110 mm	125 mm	95 mm	110 mm	125 mm	95 mm	110 mm	125 mm	95 mm	110 mm	125 mm	95 mm	110 mm	125 mm	100 mm	110 mm	100 mm	110 mm	100 mm	110 mm	100 mm	110 mm	100 mm	110 mm	100 mm	110 mm	100 mm	110 mm	100 mm	110 mm	100 mm	110 mm
Head-tube angle	64.4°	64.4°	64.4°	64.7°	64.7°	64.7°	64.8°	64.8°	64.8°	64.8°	64.8°	64.8°	65°	65°	65°	65.2°	65.2°	65.2°	65.2°	65.2°	65.2°	65.4°	65.4°	65.4°	65.5°	65.5°	65.5°	64.4°	64.4°	64.7°	64.6°	64.8°	64.8°	64.8°	64.8°	65°	65°	65.2°	65.2°	65.2°	65.2°	65.4°	65.4°	65.5°	65.5°
Seat-tube angle	75.4°	75.4°	75.4°	75.7°	75.7°	75.7°	75.8°	75.8°	75.8°	75.8°	75.8°	75.8°	76°	76°	76°	76.2°	76.2°	76.2°	76.2°	76.2°	76.2°	76.4°	76.4°	76.4°	76.5°	76.5°	76.5°	75.4°	75.4°	75.7°	75.6°	75.8°	75.8°	75.8°	75.8°	76°	76°	76.2°	76.2°	76.2°	76.2°	76.4°	76.4°	76.5°	76.5°
Chainstay / rear center	438 - 449	438 - 449	438 - 449	438 - 449	438 - 449	438 - 449	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	437 - 448	436 - 447	436 - 447	436 - 447	436 - 447	436 - 447	436 - 447	428 - 439	428 - 439	428 - 439	428 - 439	428 - 439	428 - 439	427 - 438	427 - 438	427 - 438	427 - 438	427 - 438	427 - 438	427 - 438	427 - 438	426 - 437	426 - 437	425 - 436	426 - 437
Wheelbase	1218 mm	1249 mm	—	1218 mm	1249 mm	1285 mm	1217 mm	1249 mm	1285 mm	1217 mm	1249 mm	1285 mm	1217 mm	1249 mm	1285 mm	1217 mm	1248 mm	1285 mm	1217 mm	1248 mm	1285 mm	1217 mm	1248 mm	1284 mm	1216 mm	1248 mm	1284 mm	1172 mm	1201 mm	1172 mm	1201 mm	1171 mm	1200 mm	1171 mm	1200 mm	1171 mm	1199 mm	1170 mm	1200 mm	1170 mm	1200 mm	1170 mm	1199 mm	1169 mm	1198 mm
Bottom-bracket drop	34 mm	34 mm	34 mm	32 mm	32 mm	32 mm	30 mm	30 mm	30 mm	29 mm	30 mm	30 mm	27 mm	27 mm	27 mm	25 mm	25 mm	25 mm	25 mm	25 mm	25 mm	22 mm	22 mm	22 mm	19 mm	19 mm	19 mm	20 mm	19 mm	18 mm	17 mm	15 mm	15 mm	15 mm	14 mm	12 mm	12 mm	9 mm	10 mm	9 mm	10 mm	7 mm	7 mm	4 mm	5 mm
Reach	449 mm	474 mm	504 mm	451 mm	476 mm	506 mm	453 mm	478 mm	508 mm	453 mm	478 mm	508 mm	455 mm	480 mm	510 mm	457 mm	482 mm	512 mm	457 mm	482 mm	512 mm	459 mm	484 mm	514 mm	461 mm	486 mm	516 mm	423 mm	449 mm	425 mm	451 mm	428 mm	453 mm	428 mm	453 mm	430 mm	455 mm	432 mm	457 mm	432 mm	457 mm	434 mm	459 mm	437 mm	461 mm
Stack	624 mm	638 mm	652 mm	623 mm	637 mm	650 mm	622 mm	635 mm	649 mm	622 mm	635 mm	649 mm	620 mm	634 mm	647 mm	619 mm	632 mm	646 mm	619 mm	632 mm	646 mm	617 mm	631 mm	644 mm	616 mm	629 mm	643 mm	601 mm	610 mm	599 mm	608 mm	598 mm	607 mm	598 mm	607 mm	596 mm	606 mm	595 mm	604 mm	595 mm	604 mm	593 mm	602 mm	591 mm	601 mm
Standover height	813 mm	813 mm	813 mm	814 mm	814 mm	814 mm	815 mm	815 mm	815 mm	815 mm	815 mm	815 mm	816 mm	816 mm	816 mm	817 mm	817 mm	817 mm	817 mm	817 mm	817 mm	818 mm	818 mm	818 mm	819 mm	819 mm	819 mm	767 mm	797 mm	769 mm	800 mm	770 mm	802 mm	770 mm	802 mm	771 mm	804 mm	772 mm	806 mm	772 mm	807 mm	773 mm	809 mm	774 mm	812 mm
Wheel size	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5	27.5

Dimensions as recorded.

Gearing

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

Pedal cadence

RPM

Speed units

RPM = pedal turns per minute.

MD · 29″, LG · 29″, XL · 29″32T · 10–51T · 12-speed

Lowest0.63:1 Highest3.20:1 Total range510%

Estimated speed At 90 RPM Lowest gear4.9 mph Highest gear25.1 mph

Rear tire: 2.4″ + 29-inch.

SM · 27.5″, MD · 27.5″34T · 10–51T · 12-speed

Lowest0.67:1 Highest3.40:1 Total range510%

Estimated speed At 90 RPM Lowest gear5.0 mph Highest gear25.3 mph

Rear tire: 2.4″ + 27.5-inch.

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.

Original size / build

Gears Drivetrain

Front teeth Smallest rear teeth Largest rear teeth

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

Rear tire

Rear tire marking

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).

Rim diameter (BSD, mm) Tire width (mm)

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.

Cadence (RPM) Speed units

Gear, dimension and cadence changes update results automatically.

Gearing comparison
Measure	Original	Your setup
Lowest ratio	—	—
Highest ratio	—	—
Total range	—	—
Lowest-gear speed	—	—
Highest-gear speed	—	—

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

Parts & serviceability

Find replacement parts

Original specifications

Chain · Original

Shimano XTR 12s

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Retailer offers

Shimano Deore CN-M6100 Chain Silver, 12 Speed, 126 Links

Replacement option

Competitive Cyclist ↗$30.00

Cassette · Original

Shimano XTR 12s 10-51T

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Retailer offers

Shimano XTR CS-M9200 12 Speed 10-51T Cassette Silver, 10-51t

Specification match

Competitive Cyclist ↗$500.00

Front tire · Original

Maxxis Minion DHF 2.5 WT 3C MaxxGrip DD Tubeless Ready

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More parts (7)Fewer parts

Rear derailleur · Original

Shimano XTR Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.

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Retailer offers

Shimano XTR M9250 Rear Derailleur One Color, SGS 12 speed,Top Normal

Specification match

Competitive Cyclist ↗$665.00

Rear tire · Original

Maxxis Minion DHR II 2.4 WT 3C MaxxGrip DD Tubeless Ready

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Bottom bracket · Original

Shimano SM-BB71

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Saddle · Original

WTB Volt Race 142

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Shifters · Original

Shimano XTR Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.

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Handlebar · Original

Race Face Next R 780mm

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Headset · Original

FSA Orbit NO.57E

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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.

Drivetrain: 12-speedCheck: Match the installed drivetrain family, not just its speed count.
Bottom bracket / shell: Shimano SM-BB71Check: Verify shell type and width, crank interface, and spindle length or spacers.

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

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

2021 Rocky Mountain Altitude Carbon 90 Rally Edition