Lowest0.75:1
Highest3.82:1
Total range509%
Estimated speed At 90 RPM
Lowest gear
Highest gear
Uses front tire 26×2.1; rear size isn’t listed.
Velopedia Bicycle Archive
2005 Marin Bobcat Trail
Original specifications: Shimano Acera · 8-speed · mechanical rear derailleur · 26" wheels.
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At a glance
Archive #93456- Model year
- 2005
- Category
- Mountain
- Sizes
- 13", 15", 17", 18.5", 20"
- Colors
- Matte Black
- In this record
- 26 specifications · archived image
Model history 18 other years
Browse other years
Compare side by side
Identification clues
2005 archived details
- Published colors
- Matte Black
- Frame
- 7000 aluminum
- Original equipment
- Mountain Mix
Clues, not proof of model year. Colors vary and components may have been replaced.
Original build7000 aluminum · Mountain Mix · 26" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 7000 aluminum |
| Fork | Spinner Grind AC 323, 80mm travel |
| Fork Material | Aluminum, single crown |
Drivetrain
| Component Group | Mountain Mix |
|---|---|
| Shifters | Shimano Acera EZ Fire |
| Front Derailleur | Shimano T-300 |
| Rear Derailleur | Shimano Acera |
| Crankset | TruVativ X-Flow, 24/34/42 teeth |
| Bottom Bracket | TruVativ cartridge |
| Rear Cogs | 8-speed, 11 - 32 teeth |
| Chain | Shimano CN-IG31, 1/2 x 3/32" |
| Pedals | Composite body |
Brakes
| Brakes | Aluminum linear-pull brakes, Shimano Acera levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless WTB ST 1 |
|---|---|
| Handlebar | Aluminum, 1" rise |
| Handlebar Extensions | Not included |
| Stem | Aluminum |
| Saddle | WTB Speed V Sport |
| Seatpost | Aluminum micro-adjust, 27.2mm diameter |
Wheels & Tires
| Hubs | Shimano disc |
|---|---|
| Rims | Alex TD-20, 32-hole |
| Spokes | Stainless steel, 15ga. (1.8mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 26 x 2.10" IRC Nythos XCII |
| Wheel Size | 26" wheels |
No specifications match. Try a component name or clear your search.
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
Shimano CN-IG31
1/2 x 3/32"
Retailer offers
SRAM PC-830 Chain One Color, 8 Speed
Replacement option
Shimano CN-IG31 on eBaySponsored links
Aluminum micro-adjust
27.2mm diameter
Retailer offers
Race Face Ride XC Seatpost Black, 27.2x375mm
Replacement option
26 x 2.10" IRC Nythos XCII
More parts (6)Fewer parts
Aluminum linear-pull brakes
Shimano Acera levers
WTB Speed V Sport
Shimano Acera
Shimano Acera EZ Fire
1 1/8" threadless WTB ST 1
Alex TD-20
32-hole
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
- 26 x 2.10" IRC Nythos XCII
- Drivetrain
- 8-speed
- Seatpost diameter
- 27.2 mm
- Bottom bracket / shell
- TruVativ cartridge
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: TIG-welded · Fork: Spinner Grind AC 323, 80mm travel · Aluminum, single crown
Suspension
Evaluate the suspension →Archived: Fork: Spinner Grind AC 323, 80mm travel
Drivetrain
Check drivetrain wear →Archived: Group: Mountain Mix · Shifters: Shimano Acera EZ Fire · Front derailleur: Shimano T-300 · Rear derailleur: Shimano Acera · Crankset: TruVativ X-Flow, 24/34/42 teeth · Bottom bracket: TruVativ cartridge · Rear cogs: 8-speed, 11 - 32 teeth · Chain: Shimano CN-IG31, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Aluminum linear-pull brakes, Shimano Acera levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: Alex TD-20, 32-hole · Hubs: Shimano disc · Front tire: 26 x 2.10" IRC Nythos XCII
Controls and contact points
Archived: Headset: 1 1/8" threadless WTB ST 1 · Handlebar: Aluminum, 1" rise · Stem: Aluminum · Seatpost: Aluminum micro-adjust, 27.2mm diameter · Saddle: WTB Speed V Sport · Pedals: Composite body
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Market Snapshot
Checked Nov 8, 2026We may earn a commission from purchases through these eBay links.
Marin Bobcat Trail 27.5" MTB 17" Aluminum Front Susp Blue/Yellow Mech Disc
Used · Fixed price · offers accepted · USD 400.00
Seller size: 17 in
Model year not confirmed
Marin Bobcat Trail 3 Hardtail Mountain Bike 27.5" Blue/Yellow/Magenta, Medium
New · Fixed price · USD 679.00
Seller size: Medium
Shipping shown: $174.99; confirm for your destination.
Model year not confirmed
Model-family used asking$400.00Median asking · middle 50% $350.00–$527.12 · 5 listings
Model-family new asking$799.99Median asking · middle 50% $712.49–$799.99 · 10 listings
Price history
Model-family used asking prices
View observation data
| Observed | Median | Middle 50% | Matches |
|---|---|---|---|
| Nov 8, 2026 | $400.00 | $350.00–$527.12 | 5 |
| Nov 6, 2026 | $400.00 | $350.00–$527.12 | 5 |
| Oct 27, 2026 | $500.00 | $375.00–$527.12 | 5 |
| Oct 26, 2026 | $500.00 | $375.00–$527.12 | 5 |
| Oct 10, 2026 | $527.12 | — | 3 |
| Oct 8, 2026 | $527.12 | $500.00–$550.00 | 5 |
| Oct 3, 2026 | $513.56 | $500.00–$544.28 | 6 |
| Sep 29, 2026 | $513.56 | $500.00–$544.28 | 6 |
| Sep 25, 2026 | $513.56 | $500.00–$544.28 | 6 |
| Sep 14, 2026 | $527.12 | $500.00–$550.00 | 5 |
| Sep 7, 2026 | $527.12 | $500.00–$600.00 | 5 |
| Aug 31, 2026 | $513.56 | — | 4 |
Asking prices, not completed sales. Shipping and tax excluded.
Find this bike on eBay
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Archive record
- Category
- Mountain bike, front suspension
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Specifications
- Frame
- Chromoly, butted
- Groupset
- Mountain Mix
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.