Velopedia Bicycle Archive
2025 Polygon Collosus DH7
Mountain bicycle from the Velopedia specification archive.
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What Velopedia knows
- Model year
- 2025
- Category
- Mountain
- Original MSRP
- $3,499.00
- Sizes
- S, M, L, XL
- Colors
- Black Gold
- Geometry
- 8 manufacturer sizes · Geometry context
- Record coverage
- 22 preserved details · archived image · original MSRP · preserved geometry
- Archive ID
- 900001515
Frameset
| Frame Construction | ALX Downhill 200mm Travel |
|---|---|
| Frame Material | Aluminum |
| Fork | RockShox Boxxer Base, Air Spring, Travel:200mm, Charger 3, Compression, Rebound |
| Rear Shock | RockShox Vivid Base, E2E: Metric 250x75mm |
Drivetrain
| Shifters | SRAM GX DH, 1X7-Speed Trigger |
|---|---|
| Rear Derailleur | SRAM GX DH |
| Crankset | SRAM Descendant DH, 34T |
| Bottom Bracket | SRAM DUB BSA 83mm |
| Cassette | SRAM PG720, 11-25T |
| Chain | KMC X11 |
| Pedals | Alloy W/ Replaceable PIN |
Brakes
| Brakes | TRP DH-R EVO HYDRAULIC DISC; Levers: TRP DH-R EVO; Rotors: TRP RS01E 203mm, 6BOLT |
|---|
Cockpit & Contact Points
| Headset | FSA no.55/57-1, ZS 56/28.6 | ZS 56/30 |
|---|---|
| Handlebar | RACEFACE ATLAS 35, W: 820mm, BB: 35mm, R/D: 35mm, B: 8degree |
| Stem | Raceface Atlas 35 Direct Mount, EXT: 50mm, BB: 35mm, R/D: 0DEGREE |
| Saddle | Linc Xtent |
| Seatpost | Polygon Expert, DXL: 34,9 X 320mm |
Wheels & Tires
| Hubs | F: Novatec 32H TA 20x110 6B / R: Novatec 32H TA 12x157 6B for Cassette Sprocket |
|---|---|
| Wheels | Alloy RIM |
| Rims | F: Alloy RIM 622-29 32H / R: Alloy RIM 584-29 32H |
| Front Tire | Schwalbe Tacky Chan Addix Soft Front: 29"X2.4" (622-62) ; Rear: 27.5"X2.4" (584-62) |
| Rear Tire | Schwalbe Tacky Chan Addix Soft Front: 29"X2.4" (622-62) ; Rear: 27.5"X2.4" (584-62) |
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 | S · High | M · High | L · High | XL · High | S · Low | M · Low | L · Low | XL · Low |
|---|---|---|---|---|---|---|---|---|
| Seat tube | 390 mm | 390 mm | 390 mm | 390 mm | 390 mm | 390 mm | 390 mm | 390 mm |
| Effective top tube | 557 mm | 580 mm | 600 mm | 622 mm | 558 mm | 581 mm | 601 mm | 623 mm |
| Head tube | 105 mm | 105 mm | 105 mm | 105 mm | 105 mm | 105 mm | 105 mm | 105 mm |
| Head-tube angle | 63° | 63° | 63° | 63° | 62.6° | 62.6° | 62.6° | 62.6° |
| Seat-tube angle | 78.5° | 78.5° | 78.5° | 78.5° | 78.1° | 78.1° | 78.1° | 78.1° |
| Actual seat-tube angle | 72° | 72° | 72° | 72° | 71.6° | 71.6° | 71.6° | 71.6° |
| Chainstay / rear center | 445 mm | 445 mm | 445 mm | 445 mm | 446 mm | 446 mm | 446 mm | 446 mm |
| Wheelbase | 1250 mm | 1273 mm | 1293 mm | 1315 mm | 1251 mm | 1274 mm | 1294 mm | 1316 mm |
| Bottom-bracket drop | 24 mm | 24 mm | 24 mm | 24 mm | 30 mm | 30 mm | 30 mm | 30 mm |
| Bottom-bracket height | 356 mm | 356 mm | 356 mm | 356 mm | 350 mm | 350 mm | 350 mm | 350 mm |
| Reach | 437 mm | 460 mm | 480 mm | 502 mm | 433 mm | 456 mm | 476 mm | 498 mm |
| Stack | 632 mm | 632 mm | 632 mm | 632 mm | 635 mm | 635 mm | 635 mm | 636 mm |
| Standover height | 817 mm | 817 mm | 817 mm | 817 mm | 813 mm | 813 mm | 813 mm | 813 mm |
Geometry source: Polygon first-party metric 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.
S geometry
Configuration
Archive context: Its wheelbase of 1250 mm sits toward the longer end. The head angle of 63° sits toward the slacker end. The seat angle of 78.5° sits toward the steeper end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze S · High geometry Archive context: The head angle of 62.6° sits toward the slacker end. Its wheelbase of 1251 mm sits toward the longer end. Its stack of 635 mm sits toward the taller end.
Compared with 180 distinct mountain geometries in the Small-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze S · Low geometry M geometry
Configuration
Archive context: Its wheelbase of 1273 mm sits toward the longer end. The seat angle of 78.5° sits toward the steeper end. The head angle of 63° sits toward the slacker end.
Compared with 186 distinct mountain geometries in the Medium-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze M · High geometry Archive context: The head angle of 62.6° sits toward the slacker end. Its wheelbase of 1274 mm sits toward the longer end. The seat angle of 78.1° sits toward the steeper end.
Compared with 186 distinct mountain geometries in the Medium-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze M · Low geometry L geometry
Configuration
Archive context: The seat angle of 78.5° sits toward the steeper end. Its wheelbase of 1293 mm sits toward the longer end. The head angle of 63° sits toward the slacker end.
Compared with 179 distinct mountain geometries in the Large-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze L · High geometry Archive context: The head angle of 62.6° sits toward the slacker end. The seat angle of 78.1° sits toward the steeper end. Its wheelbase of 1294 mm sits toward the longer end.
Compared with 179 distinct mountain geometries in the Large-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze L · Low geometry XL geometry
Configuration
Archive context: The seat angle of 78.5° sits toward the steeper end. The head angle of 63° sits toward the slacker end. Its bottom-bracket drop of 24 mm sits toward the shallower-drop end.
Compared with 158 distinct mountain geometries in the XL-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XL · High geometry Archive context: The head angle of 62.6° sits toward the slacker end. The seat angle of 78.1° sits toward the steeper end. Its wheelbase of 1316 mm sits toward the longer end.
Compared with 158 distinct mountain geometries in the XL-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XL · Low geometry Parts & serviceability
Find replacement parts
ChainKMC X11Exact archived model
CassetteSRAM PG720, 11-25TNamed component · published drivetrain speed — verify exact version
Bottom bracketSRAM DUB BSA 83mmNamed archived component — verify dimensions
More qualified parts (3)
CranksetSRAM Descendant DH, 34TNamed archived component — verify exact version
Rear derailleurSRAM GX DHNamed component · published drivetrain speed — verify exact version
ShiftersSRAM GX DH, 1X7-Speed TriggerComponent family — verify exact version
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- 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 →
- BrakesBoth levers should feel firm and return cleanly. Check for fluid around the levers and calipers, inspect pad thickness and contamination, and look for worn or bent rotors.Inspect the brakes →
- SuspensionAsk when the fork and shock were last serviced. Check the stanchions for damage, look for oil at the seals, cycle both units through their travel and test the suspension pivots for play.Evaluate the suspension →
- DrivetrainShift through the full range under light load, measure chain wear and inspect the cassette or freewheel teeth. Skipping or hesitation can indicate wear, poor adjustment or mismatched parts.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 22 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2025 Polygon Collosus DH7 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: ALX DOWNHILL 200mm TRAVEL · Fork: ROCKSHOX BOXXER BASE, AIR SPRING, TRAVEL:200mm, CHARGER 3, COMPRESSION, REBOUND
Suspension
Evaluate the suspension →Archived: Fork: ROCKSHOX BOXXER BASE, AIR SPRING, TRAVEL:200mm, CHARGER 3, COMPRESSION, REBOUND · Rear shock: ROCKSHOX VIVID BASE, E2E: METRIC 250x75mm
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM GX DH, 1x7-SPEED TRIGGER · Rear derailleur: SRAM GX DH · Crankset: SRAM DESCENDANT DH, 34T · Bottom bracket: SRAM DUB BSA 83mm · Cassette: SRAM PG720, 11-25T · Chain: KMC X11
Brakes
Inspect the brakes →Archived: Brakes: TRP DH-R EVO HYDRAULIC DISC; Levers: TRP DH-R EVO; Rotors: TRP RS01E 203mm, 6BOLT
Wheels and tires
Check wheels and tires →Archived: Wheels: ALLOY RIM · Rims: F: ALLOY RIM 622-29 32H / R: ALLOY RIM 584-29 32H · Hubs: F: NOVATEC 32H TA 20X110 6B / R: NOVATEC 32H TA 12X157 6B FOR CASSETTE SPROCKET · Front tire: SCHWALBE TACKY CHAN ADDIX SOFT FRONT: 29"x2.4" (622-62) ; REAR: 27.5"x2.4" (584-62) · Rear tire: SCHWALBE TACKY CHAN ADDIX SOFT FRONT: 29"x2.4" (622-62) ; REAR: 27.5"x2.4" (584-62)
Controls and contact points
Archived: Headset: FSA NO.55/57-1, ZS 56/28.6 | ZS 56/30 · Handlebar: RACEFACE ATLAS 35, W: 820mm, BB: 35mm, R/D: 35mm, B: 8degree · Stem: RACEFACE ATLAS 35 DIRECT MOUNT, EXT: 50mm, BB: 35mm, R/D: 0degree · Seatpost: POLYGON EXPERT, DxL: 34,9 X 320mm · Saddle: LINC XTENT · Pedals: ALLOY W/ REPLACEABLE PIN
Before and during the test ride
Follow the full used-bike inspection order →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.