Bicycle Archive · Specification reportBicycle Archive · Specification report2004 Diamondback Reactor Expert · 2008 Diamondback Reactor Expert
| Specification | 2004 Diamondback Reactor Expert | 2008 Diamondback Reactor Expert |
|---|---|---|
| Overview | ||
| Model year | 2004 | 2008 |
| Brand | Diamondback | Diamondback |
| Model | Reactor Expert | Reactor Expert |
| Bicycle type | BMX | BMX |
| Archive ID | 31721 | 24069 |
| Original MSRP | $275.00 | $325.00 |
| Colors | Super Nickel | Silver Metallic |
| Sizes | 20" | 19.75" top tube |
| Frameset | ||
| Frame construction | TIG-welded | TIG-welded |
| Frame material | 7005 aluminum | 7005 aluminum |
| Fork | RMX Pro | Diamondback |
| Fork material | CRMO, single crown | Chromoly, unicrown crown |
| Rear shock | N/A | N/A |
| Drivetrain | ||
| Component group | N/A | BMX Mix |
| Shifters | N/A | N/A |
| Front derailleur | N/A | N/A |
| Rear derailleur | N/A | N/A |
| Crankset | Forged alloy, 44 teeth | FSA Newton, 43 teeth |
| Bottom bracket | Sealed, tapered spindle | Euro Power Spline |
| BB shell width | 68mm English | — |
| Rear cogs | 1-speed, 16 teeth | 1-speed, 16 teeth |
| Chain | KMC Z610, 1/2 x 3/32" | KMC, 1/2 x 3/32" |
| Pedals | DB Bigfoot, alloy platform | DB Sound Alloy w/replaceable pins |
| Brakes | ||
| Brakes | Tektro alloy rear brakes, Tektro rear levers | Tektro 930 linear brakes, Tektro levers |
| Cockpit & contact points | ||
| Headset | 1 1/8" FSA | 1 1/8" threadless FSA |
| Handlebar | RMX CrMo | 6061 aluminum riser |
| Handlebar extensions | N/A | Not included |
| Stem | RMX cnc, aluminum | DB Reactor |
| Saddle | RMX padded | DB Race |
| Seatpost | Aluminum micro-adjust, 26.8mm diameter | Alloy micro-adjust, 27.2mm diameter |
| Wheels & tires | ||
| Hubs | Sealed mechanism | Front: Sealed bearing alloy, Rear: Aluminum cassette |
| Rims | Alex 7X23F, 36-hole | Sun CR-8, 32-hole |
| Spokes | — | 14ga. (2.0mm) straight gauge |
| Front tire | 20 x 1.75" Tioga Comp III | 20 x 1.5" Kenda Small Block Eight |
| Wheel size | 20" wheels | 20" wheels |
One selected size or frame position per bicycle, matching the comparison dropdown choices used when Print / PDF was opened.
| Measurement | 2004 Diamondback Reactor Expert | 2008 Diamondback Reactor Expert |
|---|---|---|
| Selected size / position | Legacy reference | — |
| Head-tube angle | 73° | — |
| Seat-tube angle | 71° | — |
| Chainstay / rear center | 388.6 mm | — |
Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on November 14, 2026.