Velopedia Bicycle Archive
2026 Trek Roscoe Gen 4 Frameset
Mountain bicycle from the Velopedia specification archive.
- Original MSRP
- $699.99
- Sizes
- S (27.5" wheel); M (29" wheel); ML (29" wheel); L (29" wheel); XL (29" wheel)
- Colors
- Lava
- Weight
- M - 2.25 kg / 4.97 lbs (excluding bag)
- Geometry
- 5 manufacturer sizes
- Archive ID
- 900000748
Current market
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Used-frameset inspection
If you’re buying this frameset used
Before buying: confirm the serial number and exact model, inspect frame and fork alignment, and inventory every included axle, hanger, clamp, headset part, cable guide and proprietary fitting.
Inspect the frame and fork →- FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
- Included hardwareInventory every axle, hanger, clamp, headset part, cable guide, frame plug and proprietary fitting included with the frameset. Confirm replacement availability before treating a missing small part as insignificant.
- AlignmentSight along the frame and fork from several directions. Confirm that the fork, rear dropouts, head tube and other visible interfaces appear straight; professional measurement is appropriate when alignment cannot be established visually.
Used-frameset inspection checklist 13 universal checks for a record with limited component data Open checklistClose checklist
The archived record does not contain enough component detail for a fully specification-informed frameset checklist. Use these universal checks on the frameset in front of you, inventory every included part and confirm exact interfaces before choosing components.
Identity and fit
Follow the full used-bike inspection order →Archived: 2026 Trek Roscoe Gen 4 Frameset · Mountain · Published sizes: S (27.5" wheel); M (29" wheel); ML (29" wheel); L (29" wheel); XL (29" wheel)
Frame and fork
Inspect the frame and fork →Archived: Frame: Alpha Platinum Aluminum, tapered head tube, ZS headset, internal derailleur & dropper post routing, ISCG 05, threaded BB, UDH, 148x12mm thru axle
Alignment
Inspect the frame and fork →Frame interfaces
Inspect the bottom bracket and shell →Before accepting the frameset
Inspect the frame and fork →Have you owned this bike?Help preserve its real-world history by sharing your owner experience.
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Frameset
| Frame Construction | Alpha Platinum Aluminum, tapered head tube, ZS headset, internal derailleur & dropper post routing, ISCG 05, threaded BB, UDH, 148x12mm thru axle |
|---|---|
| Frame Material | Aluminum |
Cockpit & Contact Points
| Headset | FSA Orbit, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom, 1.5 crown |
|---|
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | 15.5" (S) | 17.5" (M) | 18.5" (ML) | 19.5" (L) | 21.5" (XL) |
|---|---|---|---|---|---|
| Seat tube | 330 mm | 375 mm | 400 mm | 425 mm | 450 mm |
| Effective top tube | 575 mm | 611 mm | 614 mm | 632 mm | 655 mm |
| Head tube | 90 mm | 100 mm | 105 mm | 120 mm | 145 mm |
| Head-tube angle | 65° | 65° | 65° | 65° | 65° |
| Seat-tube angle | 75° | 75° | 76° | 76° | 77° |
| Actual seat-tube angle | 73.1° | 73.1° | 74.1° | 74.1° | 75.1° |
| Chainstay / rear center | 425 mm | 430 mm | 430 mm | 430 mm | 430 mm |
| Wheelbase | 1139 mm | 1186 mm | 1203 mm | 1224 mm | 1265 mm |
| Bottom-bracket drop | 45 mm | 61 mm | 61 mm | 61 mm | 61 mm |
| Bottom-bracket height | 311 mm | 312 mm | 312 mm | 312 mm | 312 mm |
| Reach | 415 mm | 440 mm | 455 mm | 470 mm | 500 mm |
| Stack | 604 mm | 644 mm | 648 mm | 662 mm | 684 mm |
| Standover height | 714 mm | 735 mm | 740 mm | 740 mm | 740 mm |
| Fork offset / rake | 37 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Trail | 125 mm | 125 mm | 125 mm | 125 mm | 125 mm |
| Wheel size | 27.5" | 29" | 29" | 29" | 29" |
Geometry source: Trek first-party OCC sizing data ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.