Ratio2.75:1
Estimated speed At 90 RPM
Gear
Rear tire: 20×2.125.
Velopedia Bicycle Archive
1997 Haro Blammo (01)
Original specifications: 20" wheels · 33.5 lb published weight · legacy reference geometry.
Planning to sell? Draft your listing
No archive photo is available for this record.
At a glance
Archive #69644- Model year
- 1997
- Category
- BMX
- Original MSRP
- $846.00
- Sizes
- Boys
- Colors
- Chrome-plated
- Weight
- 33.5 lb
- Geometry
- Legacy reference
- In this record
- 23 specifications · original MSRP · geometry
Original buildChromoly · 20" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | Chromoly |
| Fork | Fusion Megafork |
| Fork Material | Chromoly, unicrown crown |
Drivetrain
| Crankset | Fusion 3-piece, 44 teeth |
|---|---|
| Bottom Bracket | Fusion sealed, 145 mm spindle |
| BB Shell Width | 68mm Threadless |
| Rear Cogs | 1-speed, 16 teeth |
| Chain | KMC 410, 1/2 x 1/8" |
| Pedals | Fushion DX |
Brakes
| Brakes | Dia-Compe 990/Fusion ABS brakes, Dia-Compe Tech 77 levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Dia-Compe Aheadset w/SST Oryg detangler |
|---|---|
| Handlebar | Fusion Kneesaver II |
| Stem | Fusion |
| Saddle | Fusion Kashimax |
| Seatpost | Fusion layback, 25.4 mm diameter |
Wheels & Tires
| Hubs | Fusion Fat |
|---|---|
| Rims | Araya Super 7X, 48-hole |
| Spokes | HTI stainless steel, 2.0mm straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 20 x 2.125" Haro Mutisurface II |
| Rear Tire | 20 x 2.125" Haro Multisurface II |
| Wheel Size | 20" wheels |
No specifications match. Try a component name or clear your search.
Geometry
Historical measurements. Frame size unknown.
Reference drawing
Size
Measurement
Measurement
—
Select an available measurement to locate it on the frame.
All geometry measurementsLegacy reference · 6 measurements
| Measurement | Legacy reference |
|---|---|
| Top tube | 508 mm |
| Head-tube angle | 74.5° |
| Seat-tube angle | 69° |
| Chainstay / rear center | 375.9 mm |
| Wheelbase | 886.5 mm |
| Fork offset / rake | 32 mm |
Frame size not 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
20 x 2.125" Haro Mutisurface II
Replacement search: 20x2.125 bicycle tire Before ordering: Check rim type and tire clearance.
Fusion layback
25.4 mm diameter
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
- Front: 20 x 2.125" Haro Mutisurface II, Rear: 20 x 2.125" Haro Multisurface II
- Drivetrain
- 1-speed
- Seatpost diameter
- 25.4 mm
- Bottom bracket / shell
- Fusion sealed, 145 mm spindle · 68mm Threadless
Equipment inspection checks 10 checks based on 5 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: TIG-welded · Fork: Fusion Megafork · Chromoly, unicrown crown
Drivetrain
Check drivetrain wear →Archived: Crankset: Fusion 3-piece, 44 teeth · Bottom bracket: Fusion sealed, 145 mm spindle · Rear cogs: 1-speed, 16 teeth · Chain: KMC 410, 1/2 x 1/8"
Brakes
Inspect the brakes →Archived: Brakes: Dia-Compe 990/Fusion ABS brakes, Dia-Compe Tech 77 levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 20" wheels · Rims: Araya Super 7X, 48-hole · Hubs: Fusion Fat · Front tire: Front: 20 x 2.125" Haro Mutisurface II, Rear: 20 x 2.125" Haro Multisurface II
Controls and contact points
Archived: Headset: 1 1/8" threadless Dia-Compe Aheadset w/SST Oryg detangler · Handlebar: Fusion Kneesaver II · Stem: Fusion · Seatpost: Fusion layback, 25.4 mm diameter · Saddle: Fusion Kashimax · Pedals: Fushion DX
Have you owned this model?Help preserve its real-world history by sharing your owner experience.
Share the details that would help another rider understand how this model fits, rides and holds up over time. Velopedia reviews every contribution before publication.
Already contributed? Send me a fresh private edit link
For privacy, Velopedia shows the same confirmation whether or not an experience exists.
Checking current listings…
Find this bike on eBay
Search eBay US; check the model year, size and installed components. We may earn a commission from purchases.
Same brand and year
Basher
Same brand and year
Blammo (02)
- Frame
- 4130 chromoly
- Brakes
- Lee Chi PF-10 brakes, Lee Chi levers
Same category and period
SE Racing Assasin
- Frame
- 4130 chromoly
- Brakes
- Dia-Compe VC-747 brakes, Dia-Compe DP-7 levers
Same category and period
SE Racing Assasin Killer XL
- Frame
- 4130 chromoly
- Brakes
- Dia-Compe VC-747 brakes, Dia-Compe DP-7 levers
Same category and period
SE Racing Assasin Pro
- Frame
- 4130 chromoly
- Brakes
- Dia-Compe VC-747 brakes, Dia-Compe DP-7 levers
Same category and period
SE Racing Assasin Pro XL
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.