Rear tire: 2.4″ + 29-inch.
Velopedia Bicycle Archive
2021 Rocky Mountain Slayer Carbon 70
Original specifications: 29"; 27.5" wheels · 35.178 LBS|15.99 KGS published weight · geometry for 4 published sizes.
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At a glance
Archive #900004636- Model year
- 2021
- Category
- Mountain
- Original MSRP
- $6,789.00
- Sizes
- S, M, L, XL
- Colors
- Black/Blue, Black/Brown
- Weight
- 35.178 LBS|15.99 KGS
- Geometry
- 4 manufacturer sizes
- In this record
- 22 specifications · archived image · original MSRP · geometry
Model history 1 other year
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Identification clues
2021 archived details
- Published colors
- Black/Blue, 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"
Frameset
| Frame Construction | SMOOTHWALL™ Carbon. Full Sealed Cartridge Bearings. Press Fit BB. Internal Cable Routing. RIDE-9™ Adjustable Geometry. 29: 170mm Travel / 27.5: 180mm Travel. FORM™ Alloy Rear Triangle |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | Fox 38 Float EVOL GRIP2 Performance Elite Series | 27.5 = 180mm, 37mm Offset | 29 = 180mm, 44mm Offset |
| Rear Shock | Fox DHX2 Performance | Steel Spring | Sealed Bearing Eyelet | All Sizes = 230x65mm |
Drivetrain
| Shifters | Shimano XT |
|---|---|
| Rear Derailleur | Shimano XT |
| Crankset | Shimano XT | 27.5 = 34T | 29 = 32T |
| Bottom Bracket | Shimano SM-BB71 |
| Cassette | Shimano XT 10-51T |
| Chain | Shimano M8100 |
Brakes
| Brakes | Shimano XT Trail 4 Piston |
|---|
Cockpit & Contact Points
| Headset | FSA Orbit NO.57E |
|---|---|
| Handlebar | Race Face Atlas 820mm |
| Stem | Rocky Mountain 35 AM | 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
| Hubs | Front: Rocky Mountain Sealed Boost 15mm Torque Cap; Rear: DT Swiss 370 Boost 148mm |
|---|---|
| Rims | Race Face AR 30 / Tubeless Ready - Tape / Valves Incl |
| Spokes | DT Swiss Champion 2.0 |
| 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" |
No specifications match. Try a component name or clear your search.
Geometry
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
All geometry measurements20 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 Steep | LG · 29″ · POS.4 Steep | XL · 29″ · POS.4 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 Steep | MD · 27.5″ · POS.4 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 | 380 mm | 420 mm | 380 mm | 420 mm | 380 mm | 420 mm | 380 mm | 420 mm |
| Effective top tube | 604 mm | 629 mm | 664 mm | 603 mm | 629 mm | 663 mm | 603 mm | 628 mm | 662 mm | 602 mm | 627 mm | 661 mm | 570 mm | 596 mm | 571 mm | 595 mm | 572 mm | 594 mm | 567 mm | 593 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 | 90 mm | 95 mm | 90 mm | 95 mm | 90 mm | 95 mm | 90 mm | 95 mm |
| Head-tube angle | 63.2° | 63.2° | 63.2° | 63.5° | 63.5° | 63.5° | 63.8° | 63.8° | 63.8° | 64.1° | 64.1° | 64.1° | 63.9° | 63.9° | 64.2° | 64.2° | 64.5° | 64.5° | 64.8° | 64.8° |
| Seat-tube angle | 75.2° | 75.2° | 75.2° | 75.5° | 75.5° | 75.5° | 75.8° | 75.8° | 75.8° | 76.1° | 76.1° | 76.1° | 75.4° | 75.4° | 75.7° | 75.7° | 76° | 76° | 76.3° | 76.3° |
| Chainstay / rear center | 443 mm | 443 mm | 443 mm | 443 mm | 443 mm | 443 mm | 442 mm | 442 mm | 442 mm | 442 mm | 442 mm | 442 mm | 431 mm | 431 mm | 430 mm | 430 mm | 430 mm | 430 mm | 429 mm | 429 mm |
| Wheelbase | 1233 mm | 1262 mm | 1299 mm | 1233 mm | 1262 mm | 1299 mm | 1233 mm | 1261 mm | 1298 mm | 1232 mm | 1261 mm | 1298 mm | 1180 mm | 1205 mm | 1179 mm | 1204 mm | 1178 mm | 1203 mm | 1177 mm | 1202 mm |
| Bottom-bracket drop | 27 mm | 27 mm | 27 mm | 24 mm | 24 mm | 24 mm | 20 mm | 20 mm | 20 mm | 16 mm | 16 mm | 16 mm | 18 mm | 18 mm | 14 mm | 14 mm | 10 mm | 10 mm | 6 mm | 6 mm |
| Reach | 439 mm | 462 mm | 493 mm | 442 mm | 464 mm | 495 mm | 445 mm | 467 mm | 499 mm | 448 mm | 470 mm | 501 mm | 419 mm | 444 mm | 422 mm | 447 mm | 425 mm | 450 mm | 428 mm | 453 mm |
| Stack | 625 mm | 639 mm | 653 mm | 623 mm | 637 mm | 651 mm | 621 mm | 634 mm | 648 mm | 619 mm | 632 mm | 646 mm | 595 mm | 600 mm | 593 mm | 598 mm | 591 mm | 596 mm | 589 mm | 594 mm |
| Standover height | 832 mm | 832 mm | 832 mm | 834 mm | 834 mm | 834 mm | 837 mm | 837 mm | 837 mm | 839 mm | 839 mm | 839 mm | 806 mm | 806 mm | 807 mm | 807 mm | 809 mm | 809 mm | 811 mm | 811 mm |
| Wheel size | 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 |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
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 your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| 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

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

Shimano Deore CS-M6200 12-Speed Cassette Black, 10-51t, HG
Replacement option

Race Face Atlas 35 35mm Rise Handlebar Stealth, 35mm, 820mm
Model match
More parts (7)Fewer parts
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
- Shimano SM-BB71Check: 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 23 checks based on 6 archived component groups Open checklistClose checklist
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.
Identity and fit
Follow the full used-bike inspection order →Archived: 2021 Rocky Mountain Slayer Carbon 70 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: SMOOTHWALL™ Carbon. Full Sealed Cartridge Bearings. Press Fit BB. Internal Cable Routing. RIDE-9™ Adjustable Geometry. 29: 170mm Travel / 27.5: 180mm Travel. FORM™ Alloy Rear Triangle · Fork: Fox 38 Float EVOL GRIP2 Performance Elite Series | 27.5 = 180mm, 37mm Offset | 29 = 180mm, 44mm Offset
Suspension
Evaluate the suspension →Archived: Fork: Fox 38 Float EVOL GRIP2 Performance Elite Series | 27.5 = 180mm, 37mm Offset | 29 = 180mm, 44mm Offset · Rear shock: Fox DHX2 Performance | Steel Spring | Sealed Bearing Eyelet | All Sizes = 230x65mm
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano XT · Rear derailleur: Shimano XT · Crankset: Shimano XT | 27.5 = 34T | 29 = 32T · Bottom bracket: Shimano SM-BB71 · Cassette: Shimano XT 10-51T · Chain: Shimano M8100
Brakes
Inspect the brakes →Archived: Brakes: Shimano XT Trail 4 Piston
Wheels and tires
Check wheels and tires →Archived: Wheel size: 29"; 27.5" · Rims: Race Face AR 30 / Tubeless Ready - Tape / Valves Incl · Hubs: Front: Rocky Mountain Sealed Boost 15mm Torque Cap; Rear: DT Swiss 370 Boost 148mm
Controls and contact points
Archived: Headset: FSA Orbit NO.57E · Handlebar: Race Face Atlas 820mm · Stem: Rocky Mountain 35 AM | 40mm · Seatpost: Race Face Turbine R (by Fox) Dropper 30.9mm | SM = 125mm | MD = 150mm | LG - XL = 175mm · Saddle: WTB Volt Race 142
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





