
FSA Gossamer SB20 Seatpost Black, 31.6mm, 350mm
Replacement option
Velopedia Bicycle Archive
Original specifications: Shimano XTR · 9-speed · mechanical rear derailleur · 26" wheels.
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2004 archived details
Clues, not proof of model year. Colors vary and components may have been replaced.
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 6061 T6 aluminum |
| Fork | Marzocchi 888 R |
| Fork Material | Aluminum, dual crown |
| Rear Shock | Fox Coil, 7.0" travel |
| Component Group | Mountain Mix |
|---|---|
| Shifters | Shimano XTR RapidFire |
| Rear Derailleur | Shimano XTR |
| Crankset | Shimano XTR |
| Bottom Bracket | Shimano XTR octalink |
| Rear Cogs | 9-speed |
| Chain | Shimano, 1/2 x 3/32" |
| Pedals | Shimano DX |
| Brakes | Hayes Hydraulic Disc brakes, Hayes Hydraulic Disc levers |
|---|
| Headset | 1 1/8" threadless FSA Orbit UF |
|---|---|
| Handlebar | Syncros 2014 rise |
| Stem | Marzocchi Intergrated 31.8 |
| Saddle | SDG Grand Prix |
| Seatpost | Syncros 2014, 31.6mm diameter |
| Hubs | Front: WTB thru-axle, Rear: Hadley 12mm axle |
|---|---|
| Rims | WTB Laserdisc |
| Spokes | DT stainless steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 26 x 2.50" WTB Timberwolf |
| Wheel Size | 26" wheels |
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Original gearing is incomplete. Enter your setup to calculate ratios and cadence speeds.
Your changes apply to this calculation. The archived build stays unchanged.
| 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
31.6mm diameter

Replacement option
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Archived specifications for reference. Check the fitted parts before ordering.
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Archived: Frame: TIG-welded · Fork: Marzocchi 888 R · Aluminum, dual crown
Archived: Fork: Marzocchi 888 R · Rear shock: Fox Coil, 7.0" travel
Archived: Group: Mountain Mix · Shifters: Shimano XTR RapidFire · Rear derailleur: Shimano XTR · Crankset: Shimano XTR · Bottom bracket: Shimano XTR octalink · Rear cogs: 9-speed · Chain: Shimano, 1/2 x 3/32"
Archived: Brakes: Hayes Hydraulic Disc brakes, Hayes Hydraulic Disc levers
Archived: Wheel size: 26" wheels · Rims: WTB Laserdisc · Hubs: Front: WTB thru-axle, Rear: Hadley 12mm axle · Front tire: 26 x 2.50" WTB Timberwolf
Archived: Headset: 1 1/8" threadless FSA Orbit UF · Handlebar: Syncros 2014 rise · Stem: Marzocchi Intergrated 31.8 · Seatpost: Syncros 2014, 31.6mm diameter · Saddle: SDG Grand Prix · Pedals: Shimano DX
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.