Velopedia Bicycle Archive
2026 Transition Bottlerocket Frameset
Original manufacturer specifications including 27.5" wheels, 11.4 lbs / 5.18 kg (Size MD) published weight, geometry for 8 published sizes.
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What Velopedia knows
- Model year
- 2026
- Category
- Mountain
- Original MSRP
- $2,499.00
- Sizes
- S, M, L, XL
- Colors
- Snowstorm, Disco Flamingo
- Weight
- 11.4 lbs / 5.18 kg (Size MD)
- Geometry
- 8 manufacturer sizes · Geometry context
- Record coverage
- 5 preserved details · 2 archived images · original MSRP · preserved geometry
- Archive ID
- 900001463
Frameset
| Frame Construction | Bottlerocket Alloy 180mm |
|---|---|
| Frame Material | Aluminum |
| Rear Shock | Marzocchi Bomber Air(225x70mm) |
Wheels & Tires
| Wheel Size | 27.5" |
|---|
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 | SM · High | SM · Low | MD · High | MD · Low | LG · High | LG · Low | XL · High | XL · Low |
|---|---|---|---|---|---|---|---|---|
| Seat tube | 360 mm | 360 mm | 390 mm | 390 mm | 420 mm | 420 mm | 440 mm | 440 mm |
| Effective top tube | 538 mm | 533 mm | 573 mm | 568 mm | 606 mm | 601 mm | 638 mm | 633 mm |
| Head tube | 100 mm | 100 mm | 110 mm | 110 mm | 120 mm | 120 mm | 120 mm | 120 mm |
| Head-tube angle | 64° | 63.6° | 64° | 63.6° | 64° | 63.6° | 64° | 63.6° |
| Chainstay / rear center | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1191 mm | 1191 mm | 1220 mm | 1220 mm | 1249 mm | 1249 mm | 1279 mm | 1279 mm |
| Bottom-bracket drop | 15 mm | 20 mm | 15 mm | 20 mm | 15 mm | 20 mm | 15 mm | 20 mm |
| Reach | 425 mm | 421 mm | 450 mm | 446 mm | 475 mm | 471 mm | 500 mm | 496 mm |
| Stack | 607 mm | 610 mm | 616 mm | 619 mm | 625 mm | 628 mm | 625 mm | 628 mm |
Geometry source: Transition first-party SBG geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
The manufacturer publishes more than one geometry configuration. Velopedia analyzes each labeled state separately while treating them as one chassis in archive comparisons.
SM geometry
Configuration
Archive context: Its bottom-bracket drop of 15 mm sits toward the shallower-drop end. The head angle of 64° sits somewhat slacker than typical. Its wheelbase of 1191 mm sits somewhat longer than typical.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 20 mm sits toward the shallower-drop end. The head angle of 63.6° sits toward the slacker end. Its wheelbase of 1191 mm sits somewhat longer than typical.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 in the Velopedia archive.MD geometry
Configuration
Archive context: Its bottom-bracket drop of 15 mm sits toward the shallower-drop end. The head angle of 64° sits somewhat slacker than typical. Its wheelbase of 1220 mm sits somewhat longer than typical.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 20 mm sits toward the shallower-drop end. The head angle of 63.6° sits toward the slacker end. Its reach of 446 mm sits somewhat shorter than typical.
Compared with 182 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 in the Velopedia archive.LG geometry
Configuration
Archive context: Its bottom-bracket drop of 15 mm sits toward the shallower-drop end. The head angle of 64° sits somewhat slacker than typical. Its wheelbase of 1249 mm sits somewhat longer than typical.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 20 mm sits toward the shallower-drop end. The head angle of 63.6° sits toward the slacker end. Its wheelbase of 1249 mm sits somewhat longer than typical.
Compared with 178 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 in the Velopedia archive.XL geometry
Configuration
Archive context: Its bottom-bracket drop of 15 mm sits toward the shallower-drop end. Its stack of 625 mm sits toward the lower end. The head angle of 64° sits somewhat slacker than typical.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.Archive context: Its bottom-bracket drop of 20 mm sits toward the shallower-drop end. Its stack of 628 mm sits toward the lower end. The head angle of 63.6° sits toward the slacker end.
Compared with 153 distinct mountain geometries in the XL-equivalent size cohort from model years 2024–2027 in the Velopedia archive.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 →
- SuspensionAsk when the rear shock was last serviced. Check the shaft and seals for damage or oil, cycle the shock through its travel and test every suspension pivot for play.Evaluate the suspension →
- 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.
Used-frameset inspection checklist 16 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 Transition Bottlerocket Frameset · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Bottlerocket Alloy 180mm
Suspension
Evaluate the suspension →Archived: Rear shock: Marzocchi Bomber Air(225x70mm)
Alignment
Inspect the frame and fork →Frame interfaces
Inspect the bottom bracket and shell →Before accepting the frameset
Inspect the frame and fork →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.