Ratio2.00:1
Estimated speed At 90 RPM
Gear
Rear tire: 2.35″ + 20-inch.
Velopedia Bicycle Archive
2024 Rocky Mountain Flow Jr 20
Original specifications: 20" wheels · geometry for 1 published size.
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At a glance
Archive #900000721- Model year
- 2024
- Category
- Kids
- Original MSRP
- $959.00
- Sizes
- One Size
- Colors
- Yellow/Black
- Geometry
- 1 manufacturer size
- In this record
- 19 specifications · archived image · original MSRP · geometry
Original buildAluminum · 20"
Frameset
| Frame Construction | Rocky Mountain 6061 Alloy | Threaded BB | 135mm | Tapered Zerostack Headtube |
|---|---|
| Frame Material | Aluminum |
| Fork | Suntour XCM JR Air 80mm |
Drivetrain
| Crankset | Rocky Mountain Microdrive 2PC | 28T | 104mm Asymmetrical BCD | 24mm Spindle | Crank Length = 127mm |
|---|---|
| Bottom Bracket | Rocky Mountain Sealed - Shimano Compatible |
| Cassette | 14T |
| Chain | KMC Z1 |
Brakes
| Brakes | Tektro MD-M280 |
|---|
Cockpit & Contact Points
| Headset | Rocky Mountain | Loose Ball Bearings | 1-1/8" Reducer Crown Race |
|---|---|
| Handlebar | Rocky Montain Jr | 600mm Width | 25mm rise | 9° Backsweep | 5° Upsweep | 31.8 | For 19mm Grips |
| Stem | Rocky Mountain 31.8 XC | 7° Rise | All Sizes = 40mm |
| Saddle | Rocky Mountain Pivotal Jr |
| Seatpost | Rocky Mountain Pivotal 27.2mm |
Wheels & Tires
| Hubs | Front: Rocky Mountain Nuts; Rear: Novatec Sealed 10x135mm |
|---|---|
| Rims | Rocky Mountain JR30 | 32H | |
| Spokes | 2.0 Stainless |
| Front Tire | Kenda K-Rad 2.35 |
| Rear Tire | Kenda K-Rad 2.35 |
| Wheel Size | 20" |
No specifications match. Try a component name or clear your search.
Geometry
Frame measurements by size.
Reference drawing
Size
Measurement
Measurement
—
Select an available measurement to locate it on the frame.
All geometry measurements1 size · 11 measurements
| Measurement | kids |
|---|---|
| Seat tube | 240 mm |
| Effective top tube | 462 mm |
| Head tube | 100 mm |
| Head-tube angle | 68.5° |
| Seat-tube angle | 75° |
| Chainstay / rear center | 310 mm |
| Wheelbase | 866 mm |
| Bottom-bracket drop | 15 mm |
| Reach | 340 mm |
| Stack | 454 mm |
| Standover height | 604 mm |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
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
KMC Z1
Kenda K-Rad 2.35
Before ordering: Confirm the exact tire width before ordering.
Tektro MD-M280
More parts (2)Fewer parts
Rocky Mountain Sealed - Shimano Compatible
Rocky Mountain Pivotal 27.2mm
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.
Parts and service referenceQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- Kenda K-Rad 2.35
- Rear tire
- Kenda K-Rad 2.35
- Seatpost diameter
- 27.2 mm
- Bottom bracket / shell
- Rocky Mountain Sealed - Shimano Compatible
Equipment inspection checks 11 checks based on 6 archived component groups Open equipment checksClose equipment checks
Checks selected from the archived equipment. Confirm what is fitted today. This is not a complete safety inspection; use the full inspection guide before test riding.
Full used-bike inspection guide →
Frame and fork
Inspect the frame and fork →Archived: Frame: Rocky Mountain 6061 Alloy | Threaded BB | 135mm | Tapered Zerostack Headtube · Fork: Suntour XCM JR Air 80mm
Suspension
Evaluate the suspension →Archived: Fork: Suntour XCM JR Air 80mm
Drivetrain
Check drivetrain wear →Archived: Crankset: Rocky Mountain Microdrive 2PC | 28T | 104mm Asymmetrical BCD | 24mm Spindle | Crank Length = 127mm · Bottom bracket: Rocky Mountain Sealed - Shimano Compatible · Cassette: 14T · Chain: KMC Z1
Brakes
Inspect the brakes →Archived: Brakes: Tektro MD-M280
Wheels and tires
Check wheels and tires →Archived: Wheel size: 20" · Rims: Rocky Mountain JR30 | 32H | · Hubs: Front: Rocky Mountain Nuts; Rear: Novatec Sealed 10x135mm · Front tire: Kenda K-Rad 2.35 · Rear tire: Kenda K-Rad 2.35
Controls and contact points
Archived: Headset: Rocky Mountain | Loose Ball Bearings | 1-1/8" Reducer Crown Race · Handlebar: Rocky Montain Jr | 600mm Width | 25mm rise | 9° Backsweep | 5° Upsweep | 31.8 | For 19mm Grips · Stem: Rocky Mountain 31.8 XC | 7° Rise | All Sizes = 40mm · Seatpost: Rocky Mountain Pivotal 27.2mm · Saddle: Rocky Mountain Pivotal Jr
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.