Bicycle Archive · Specification report

2021 Rocky Mountain Altitude Alloy 50

Velopedia Archive ID 900004599

Overview

Model year	2021
Brand	Rocky Mountain
Model	Altitude Alloy 50
Bicycle type	Mountain
Archive ID	900004599
Original MSRP	$4,489.00
Colors	PURPLE/BLACK; BLACK/BROWN
Sizes	MD; LG; XL; SM
Weight	34.562 LBS\|15.71 KGS

Frameset

Frame construction	FORM™ Alloy. Full Sealed Cartridge Bearings. Press Fit BB. Internal Cable Routing. 2-Bolt ISCG05 Tabs. RIDE-9™ Adjustable Geometry. 2 Position Axle. 160mm Travel. FORM™ Alloy Rear Triangle
Frame material	Aluminum
Fork	Fox 36 Float EVOL GRIP Performance Series 170mm \| 27.5 = 37mm Offset \| 29 = 44mm Offset
Rear shock	Fox Float DPX2 Performance \| Sealed Bearing Eyelet \| SM = 210x55mm \| MD - LG - XL = 230x60mm

Drivetrain

Shifters	Shimano SLX
Rear derailleur	Shimano XT
Crankset	Race Face Aeffect Cinch \| 27.5 = 34T \| 29 = 32T
Bottom bracket	Shimano SM-BBMT500
Cassette	Shimano Deore 10-51T 12spd
Chain	Shimano M6100

Brakes

Brakes	Shimano XT Trail 4 Piston

Cockpit & contact points

Headset	FSA Orbit NO.57E
Handlebar	Rocky Mountain AM 780mm
Stem	Rocky Mountain 35 AM \| 40mm
Saddle	WTB Volt Race 142
Seatpost	Race Face Aeffect R Dropper 30.9mm \| Shimano MT500 Remote \| SM = 125mm \| MD = 150mm \| LG - XL = 175mm

Wheels & tires

Hubs	Front: Rocky Mountain Sealed Boost 15mm; Rear: DT Swiss 370 Boost 148mm
Rims	WTB ST i30 TCS 2.0 Tubeless / Tubeless Ready - Tape / Valves Incl
Spokes	DT Swiss Competition 2.0/1.8/2.0
Front tire	Maxxis Assegai 2.5 WT 3C MaxxGrip EXO+ Tubeless Ready
Rear tire	Maxxis Minion DHR II 2.4 WT 3C MaxxTerra EXO+ Tubeless Ready
Wheel size	29"; 27.5"

Geometry · MD · 29″ · POS.1 Slack

Seat tube	420 mm
Effective top tube	611 mm
Head tube	95 mm
Head-tube angle	64.4°
Seat-tube angle	75.4°
Chainstay / rear center	438 - 449
Wheelbase	1218 mm
Bottom-bracket drop	34 mm
Reach	449 mm
Stack	624 mm
Standover height	813 mm
Wheel size	29

Geometry · LG · 29″ · POS.1 Slack

Seat tube	445 mm
Effective top tube	640 mm
Head tube	110 mm
Head-tube angle	64.4°
Seat-tube angle	75.4°
Chainstay / rear center	438 - 449
Wheelbase	1249 mm
Bottom-bracket drop	34 mm
Reach	474 mm
Stack	638 mm
Standover height	813 mm
Wheel size	29

Geometry · XL · 29″ · POS.1 Slack

Seat tube	480 mm
Effective top tube	673 mm
Head tube	125 mm
Head-tube angle	64.4°
Seat-tube angle	75.4°
Chainstay / rear center	438 - 449
Bottom-bracket drop	34 mm
Reach	504 mm
Stack	652 mm
Standover height	813 mm
Wheel size	29

Geometry · MD · 29″ · POS.2

Seat tube	420 mm
Effective top tube	611 mm
Head tube	95 mm
Head-tube angle	64.7°
Seat-tube angle	75.7°
Chainstay / rear center	438 - 449
Wheelbase	1218 mm
Bottom-bracket drop	32 mm
Reach	451 mm
Stack	623 mm
Standover height	814 mm
Wheel size	29

Geometry · LG · 29″ · POS.2

Seat tube	445 mm
Effective top tube	639 mm
Head tube	110 mm
Head-tube angle	64.7°
Seat-tube angle	75.7°
Chainstay / rear center	438 - 449
Wheelbase	1249 mm
Bottom-bracket drop	32 mm
Reach	476 mm
Stack	637 mm
Standover height	814 mm
Wheel size	29

Geometry · XL · 29″ · POS.2

Seat tube	480 mm
Effective top tube	672 mm
Head tube	125 mm
Head-tube angle	64.7°
Seat-tube angle	75.7°
Chainstay / rear center	438 - 449
Wheelbase	1285 mm
Bottom-bracket drop	32 mm
Reach	506 mm
Stack	650 mm
Standover height	814 mm
Wheel size	29

Geometry · MD · 29″ · POS.3

Seat tube	420 mm
Effective top tube	610 mm
Head tube	95 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	437 - 448
Wheelbase	1217 mm
Bottom-bracket drop	30 mm
Reach	453 mm
Stack	622 mm
Standover height	815 mm
Wheel size	29

Geometry · LG · 29″ · POS.3

Seat tube	445 mm
Effective top tube	639 mm
Head tube	110 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	437 - 448
Wheelbase	1249 mm
Bottom-bracket drop	30 mm
Reach	478 mm
Stack	635 mm
Standover height	815 mm
Wheel size	29

Geometry · XL · 29″ · POS.3

Seat tube	480 mm
Effective top tube	672 mm
Head tube	125 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	437 - 448
Wheelbase	1285 mm
Bottom-bracket drop	30 mm
Reach	508 mm
Stack	649 mm
Standover height	815 mm
Wheel size	29

Geometry · MD · 29″ · POS.4

Seat tube	420 mm
Effective top tube	610 mm
Head tube	95 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	437 - 448
Wheelbase	1217 mm
Bottom-bracket drop	29 mm
Reach	453 mm
Stack	622 mm
Standover height	815 mm
Wheel size	29

Geometry · LG · 29″ · POS.4

Seat tube	445 mm
Effective top tube	639 mm
Head tube	110 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	437 - 448
Wheelbase	1249 mm
Bottom-bracket drop	30 mm
Reach	478 mm
Stack	635 mm
Standover height	815 mm
Wheel size	29

Geometry · XL · 29″ · POS.4

Seat tube	480 mm
Effective top tube	672 mm
Head tube	125 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	437 - 448
Wheelbase	1285 mm
Bottom-bracket drop	30 mm
Reach	508 mm
Stack	649 mm
Standover height	815 mm
Wheel size	29

Geometry · MD · 29″ · POS.5 Neutral

Seat tube	420 mm
Effective top tube	610 mm
Head tube	95 mm
Head-tube angle	65°
Seat-tube angle	76°
Chainstay / rear center	437 - 448
Wheelbase	1217 mm
Bottom-bracket drop	27 mm
Reach	455 mm
Stack	620 mm
Standover height	816 mm
Wheel size	29

Geometry · LG · 29″ · POS.5 Neutral

Seat tube	445 mm
Effective top tube	638 mm
Head tube	110 mm
Head-tube angle	65°
Seat-tube angle	76°
Chainstay / rear center	437 - 448
Wheelbase	1249 mm
Bottom-bracket drop	27 mm
Reach	480 mm
Stack	634 mm
Standover height	816 mm
Wheel size	29

Geometry · XL · 29″ · POS.5 Neutral

Seat tube	480 mm
Effective top tube	671 mm
Head tube	125 mm
Head-tube angle	65°
Seat-tube angle	76°
Chainstay / rear center	437 - 448
Wheelbase	1285 mm
Bottom-bracket drop	27 mm
Reach	510 mm
Stack	647 mm
Standover height	816 mm
Wheel size	29

Geometry · MD · 29″ · POS.6

Seat tube	420 mm
Effective top tube	609 mm
Head tube	95 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	437 - 448
Wheelbase	1217 mm
Bottom-bracket drop	25 mm
Reach	457 mm
Stack	619 mm
Standover height	817 mm
Wheel size	29

Geometry · LG · 29″ · POS.6

Seat tube	445 mm
Effective top tube	638 mm
Head tube	110 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	437 - 448
Wheelbase	1248 mm
Bottom-bracket drop	25 mm
Reach	482 mm
Stack	632 mm
Standover height	817 mm
Wheel size	29

Geometry · XL · 29″ · POS.6

Seat tube	480 mm
Effective top tube	671 mm
Head tube	125 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	437 - 448
Wheelbase	1285 mm
Bottom-bracket drop	25 mm
Reach	512 mm
Stack	646 mm
Standover height	817 mm
Wheel size	29

Geometry · MD · 29″ · POS.7

Seat tube	420 mm
Effective top tube	609 mm
Head tube	95 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	437 - 448
Wheelbase	1217 mm
Bottom-bracket drop	25 mm
Reach	457 mm
Stack	619 mm
Standover height	817 mm
Wheel size	29

Geometry · LG · 29″ · POS.7

Seat tube	445 mm
Effective top tube	638 mm
Head tube	110 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	437 - 448
Wheelbase	1248 mm
Bottom-bracket drop	25 mm
Reach	482 mm
Stack	632 mm
Standover height	817 mm
Wheel size	29

Geometry · XL · 29″ · POS.7

Seat tube	480 mm
Effective top tube	671 mm
Head tube	125 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	437 - 448
Wheelbase	1285 mm
Bottom-bracket drop	25 mm
Reach	512 mm
Stack	646 mm
Standover height	817 mm
Wheel size	29

Geometry · MD · 29″ · POS.8

Seat tube	420 mm
Effective top tube	609 mm
Head tube	95 mm
Head-tube angle	65.4°
Seat-tube angle	76.4°
Chainstay / rear center	436 - 447
Wheelbase	1217 mm
Bottom-bracket drop	22 mm
Reach	459 mm
Stack	617 mm
Standover height	818 mm
Wheel size	29

Geometry · LG · 29″ · POS.8

Seat tube	445 mm
Effective top tube	637 mm
Head tube	110 mm
Head-tube angle	65.4°
Seat-tube angle	76.4°
Chainstay / rear center	436 - 447
Wheelbase	1248 mm
Bottom-bracket drop	22 mm
Reach	484 mm
Stack	631 mm
Standover height	818 mm
Wheel size	29

Geometry · XL · 29″ · POS.8

Seat tube	480 mm
Effective top tube	670 mm
Head tube	125 mm
Head-tube angle	65.4°
Seat-tube angle	76.4°
Chainstay / rear center	436 - 447
Wheelbase	1284 mm
Bottom-bracket drop	22 mm
Reach	514 mm
Stack	644 mm
Standover height	818 mm
Wheel size	29

Geometry · MD · 29″ · POS.9 Steep

Seat tube	420 mm
Effective top tube	608 mm
Head tube	95 mm
Head-tube angle	65.5°
Seat-tube angle	76.5°
Chainstay / rear center	436 - 447
Wheelbase	1216 mm
Bottom-bracket drop	19 mm
Reach	461 mm
Stack	616 mm
Standover height	819 mm
Wheel size	29

Geometry · LG · 29″ · POS.9 Steep

Seat tube	445 mm
Effective top tube	637 mm
Head tube	110 mm
Head-tube angle	65.5°
Seat-tube angle	76.5°
Chainstay / rear center	436 - 447
Wheelbase	1248 mm
Bottom-bracket drop	19 mm
Reach	486 mm
Stack	629 mm
Standover height	819 mm
Wheel size	29

Geometry · XL · 29″ · POS.9 Steep

Seat tube	480 mm
Effective top tube	670 mm
Head tube	125 mm
Head-tube angle	65.5°
Seat-tube angle	76.5°
Chainstay / rear center	436 - 447
Wheelbase	1284 mm
Bottom-bracket drop	19 mm
Reach	516 mm
Stack	643 mm
Standover height	819 mm
Wheel size	29

Geometry · SM · 27.5″ · POS.1 Slack

Seat tube	380 mm
Effective top tube	580 mm
Head tube	100 mm
Head-tube angle	64.4°
Seat-tube angle	75.4°
Chainstay / rear center	428 - 439
Wheelbase	1172 mm
Bottom-bracket drop	20 mm
Reach	423 mm
Stack	601 mm
Standover height	767 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.1 Slack

Seat tube	420 mm
Effective top tube	607 mm
Head tube	110 mm
Head-tube angle	64.4°
Seat-tube angle	75.4°
Chainstay / rear center	428 - 439
Wheelbase	1201 mm
Bottom-bracket drop	19 mm
Reach	449 mm
Stack	610 mm
Standover height	797 mm
Wheel size	27.5

Geometry · SM · 27.5″ · POS.2

Seat tube	380 mm
Effective top tube	580 mm
Head tube	100 mm
Head-tube angle	64.7°
Seat-tube angle	75.7°
Chainstay / rear center	428 - 439
Wheelbase	1172 mm
Bottom-bracket drop	18 mm
Reach	425 mm
Stack	599 mm
Standover height	769 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.2

Seat tube	420 mm
Effective top tube	607 mm
Head tube	110 mm
Head-tube angle	64.6°
Seat-tube angle	75.6°
Chainstay / rear center	428 - 439
Wheelbase	1201 mm
Bottom-bracket drop	17 mm
Reach	451 mm
Stack	608 mm
Standover height	800 mm
Wheel size	27.5

Geometry · SM · 27.5″ · POS.3

Seat tube	380 mm
Effective top tube	579 mm
Head tube	100 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	428 - 439
Wheelbase	1171 mm
Bottom-bracket drop	15 mm
Reach	428 mm
Stack	598 mm
Standover height	770 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.3

Seat tube	420 mm
Effective top tube	606 mm
Head tube	110 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	428 - 439
Wheelbase	1200 mm
Bottom-bracket drop	15 mm
Reach	453 mm
Stack	607 mm
Standover height	802 mm
Wheel size	27.5

Geometry · SM · 27.5″ · POS.4

Seat tube	380 mm
Effective top tube	579 mm
Head tube	100 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	427 - 438
Wheelbase	1171 mm
Bottom-bracket drop	15 mm
Reach	428 mm
Stack	598 mm
Standover height	770 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.4

Seat tube	420 mm
Effective top tube	606 mm
Head tube	110 mm
Head-tube angle	64.8°
Seat-tube angle	75.8°
Chainstay / rear center	427 - 438
Wheelbase	1200 mm
Bottom-bracket drop	14 mm
Reach	453 mm
Stack	607 mm
Standover height	802 mm
Wheel size	27.5

Geometry · SM · 27.5″ · POS.5 Neutral

Seat tube	380 mm
Effective top tube	579 mm
Head tube	100 mm
Head-tube angle	65°
Seat-tube angle	76°
Chainstay / rear center	427 - 438
Wheelbase	1171 mm
Bottom-bracket drop	12 mm
Reach	430 mm
Stack	596 mm
Standover height	771 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.5 Neutral

Seat tube	420 mm
Effective top tube	603 mm
Head tube	110 mm
Head-tube angle	65°
Seat-tube angle	76°
Chainstay / rear center	427 - 438
Wheelbase	1199 mm
Bottom-bracket drop	12 mm
Reach	455 mm
Stack	606 mm
Standover height	804 mm
Wheel size	27.5

Geometry · SM · 27.5″ · POS.6

Seat tube	380 mm
Effective top tube	578 mm
Head tube	100 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	427 - 438
Wheelbase	1170 mm
Bottom-bracket drop	9 mm
Reach	432 mm
Stack	595 mm
Standover height	772 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.6

Seat tube	420 mm
Effective top tube	605 mm
Head tube	110 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	427 - 438
Wheelbase	1200 mm
Bottom-bracket drop	10 mm
Reach	457 mm
Stack	604 mm
Standover height	806 mm
Wheel size	27.5

Geometry · SM · 27.5″ · POS.7

Seat tube	380 mm
Effective top tube	578 mm
Head tube	100 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	427 - 438
Wheelbase	1170 mm
Bottom-bracket drop	9 mm
Reach	432 mm
Stack	595 mm
Standover height	772 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.7

Seat tube	420 mm
Head tube	110 mm
Head-tube angle	65.2°
Seat-tube angle	76.2°
Chainstay / rear center	427 - 438
Wheelbase	1200 mm
Bottom-bracket drop	10 mm
Reach	457 mm
Stack	604 mm
Standover height	807 mm
Wheel size	27.5

Geometry · SM · 27.5″ · POS.8

Seat tube	380 mm
Effective top tube	578 mm
Head tube	100 mm
Head-tube angle	65.4°
Seat-tube angle	76.4°
Chainstay / rear center	426 - 437
Wheelbase	1170 mm
Bottom-bracket drop	7 mm
Reach	434 mm
Stack	593 mm
Standover height	773 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.8

Seat tube	420 mm
Effective top tube	605 mm
Head tube	110 mm
Head-tube angle	65.4°
Seat-tube angle	76.4°
Chainstay / rear center	426 - 437
Wheelbase	1199 mm
Bottom-bracket drop	7 mm
Reach	459 mm
Stack	602 mm
Standover height	809 mm
Wheel size	27.5

Geometry · SM · 27.5″ · POS.9 Steep

Seat tube	380 mm
Effective top tube	577 mm
Head tube	100 mm
Head-tube angle	65.5°
Seat-tube angle	76.5°
Chainstay / rear center	425 - 436
Wheelbase	1169 mm
Bottom-bracket drop	4 mm
Reach	437 mm
Stack	591 mm
Standover height	774 mm
Wheel size	27.5

Geometry · MD · 27.5″ · POS.9 Steep

Seat tube	420 mm
Effective top tube	605 mm
Head tube	110 mm
Head-tube angle	65.5°
Seat-tube angle	76.5°
Chainstay / rear center	426 - 437
Wheelbase	1198 mm
Bottom-bracket drop	5 mm
Reach	461 mm
Stack	601 mm
Standover height	812 mm
Wheel size	27.5

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on November 7, 2026.