Velopedia Bicycle Archive
2026 Polygon Cascade 3
Mountain bicycle from the Velopedia specification archive.
Selling this bike? Create a Bike History Report
What Velopedia knows
- Model year
- 2026
- Category
- Mountain
- Original MSRP
- $399.00
- Sizes
- 27.5" XS, 27.5” SM, 27.5” MD, 27.5" LG, 29" SM, 29” MD, 29” LG, 29” XL
- Colors
- Red
- Geometry
- 6 manufacturer sizes · Geometry context
- Record coverage
- 21 preserved details · archived image · original MSRP · preserved geometry
- Archive ID
- 900001785
Frameset
| Frame Construction | ALX XC Sport Frame |
|---|---|
| Frame Material | Aluminum |
| Fork | Suntour XCE 28 100mm Travel |
Drivetrain
| Shifters | Shimano Altus SL-M315, 1X8-Speed Trigger |
|---|---|
| Rear Derailleur | Shimano Essa RD-U2000 |
| Crankset | Prowheel C10Y, 36T |
| Bottom Bracket | Square BB, 68mm |
| Cassette | Shimano CS-HG400, 11-45T |
| Chain | KMC Z-8.3 |
| Pedals | One Piece PP Body |
Brakes
| Brakes | HYDRAULIC DISC BRAKE; Levers: HYDRAULIC DISC BRAKE; Rotors: 6-BOLTS 160mm |
|---|
Cockpit & Contact Points
| Headset | Zero Stack W/ Sealed Bearing, ZS 44/28.6 | ZS 44/30 |
|---|---|
| Handlebar | Polygon Sport W: 700mm, B: 31.8mm, R/D: 20mm |
| Stem | Polygon Sport E: 40mm, B: 31.8mm, R/D: 7 |
| Saddle | Black Steel Ø7mm |
| Seatpost | Alloy Seatpost 27.2X350mm |
Wheels & Tires
| Hubs | F: Alloy, 100mm 32H QR / R: Alloy, 135mm 32H QR |
|---|---|
| Wheels | Alloy Double Wall |
| Rims | Alloy Double Wall |
| Front Tire | 27.5" / 29"x2.25" |
| Rear Tire | 27.5" / 29"x2.25" |
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 (27.5") | M (27.5″) | L (27.5″) | S (29″) | M (29″) | L (29″) |
|---|---|---|---|---|---|---|
| Seat tube | 390 mm | 430 mm | 460 mm | 390 mm | 430 mm | 460 mm |
| Effective top tube | 561 mm | 582 mm | 603 mm | 566 mm | 585 mm | 604 mm |
| Head tube | 115 mm | 120 mm | 125 mm | 90 mm | 95 mm | 100 mm |
| Head-tube angle | 68° | 68° | 68° | 68° | 68° | 68° |
| Seat-tube angle | 75° | 75° | 73° | 74° | 75° | 75° |
| Actual seat-tube angle | 75° | 75° | 75° | 75° | 75° | 75° |
| Chainstay / rear center | 440 mm | 440 mm | 440 mm | 455 mm | 455 mm | 455 mm |
| Wheelbase | 1108 mm | 1129 mm | 1151 mm | 1142 mm | 1142 mm | 1161 mm |
| Bottom-bracket drop | 45 mm | 45 mm | 45 mm | 69 mm | 69 mm | 69 mm |
| Bottom-bracket height | 310 mm | 310 mm | 310 mm | 304 mm | 303 mm | 304 mm |
| Reach | 400 mm | 420 mm | 440 mm | 420 mm | 420 mm | 440 mm |
| Stack | 601 mm | 606 mm | 610 mm | 624 mm | 624 mm | 629 mm |
| Standover height | 703 mm | 733 mm | 756 mm | 737 mm | 737 mm | 759 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
S (27.5") geometry
Archive context: Its reach of 400 mm sits toward the shorter end. Its wheelbase of 1108 mm sits toward the shorter end. The head angle of 68° sits toward the steeper end.
Compared with 168 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 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 (27.5") geometry M (27.5″) geometry
Archive context: Its reach of 420 mm sits toward the shorter end. Its wheelbase of 1129 mm sits toward the shorter end. The head angle of 68° sits toward the steeper end.
Compared with 171 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 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 (27.5″) geometry L (27.5″) geometry
Archive context: Its reach of 440 mm sits toward the shorter end. Its wheelbase of 1151 mm sits toward the shorter end. The seat angle of 73° sits toward the more relaxed end.
Compared with 166 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 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 (27.5″) geometry S (29″) geometry
Archive context: The chainstay of 455 mm sits toward the longer rear-center end. Its bottom-bracket drop of 69 mm sits toward the deeper-drop end. The head angle of 68° sits toward the steeper end.
Compared with 168 distinct mountain geometries in the Small-equivalent size cohort from model years 2024–2027 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 (29″) geometry M (29″) geometry
Archive context: The chainstay of 455 mm sits toward the longer rear-center end. Its bottom-bracket drop of 69 mm sits toward the deeper-drop end. Its reach of 420 mm sits toward the shorter end.
Compared with 171 distinct mountain geometries in the Medium-equivalent size cohort from model years 2024–2027 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 (29″) geometry L (29″) geometry
Archive context: The chainstay of 455 mm sits toward the longer rear-center end. Its bottom-bracket drop of 69 mm sits toward the deeper-drop end. Its reach of 440 mm sits toward the shorter end.
Compared with 166 distinct mountain geometries in the Large-equivalent size cohort from model years 2024–2027 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 (29″) geometry Parts & serviceability
Find replacement parts
ChainKMC Z-8.3Exact archived model
CassetteShimano CS-HG400, 11-45TExact archived model
Rear derailleurShimano Essa RD-U2000Exact archived model
More qualified parts (2)
ShiftersShimano Altus SL-M315, 1X8-Speed TriggerExact archived model
Seatpost27.2 mm seatpostPublished diameter — verify length and setback
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 was last serviced. Check the stanchions for damage, look for oil at the seals and make sure the fork moves smoothly without bushing 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 20 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: 2026 Polygon Cascade 3 · Mountain · Published sizes: 27.5" XS, 27.5” SM, 27.5” MD, 27.5" LG, 29" SM, 29” MD, 29” LG, 29” XL
Frame and fork
Inspect the frame and fork →Archived: Frame: ALX XC SPORT FRAME · Fork: SUNTOUR XCE 28 100mm TRAVEL
Suspension
Evaluate the suspension →Archived: Fork: SUNTOUR XCE 28 100mm TRAVEL
Drivetrain
Check drivetrain wear →Archived: Shifters: SHIMANO ALTUS SL-M315, 1x8-SPEED TRIGGER · Rear derailleur: SHIMANO ESSA RD-U2000 · Crankset: PROWHEEL C10Y, 36T · Bottom bracket: SQUARE BB, 68mm · Cassette: SHIMANO CS-HG400, 11-45T · Chain: KMC Z-8.3
Brakes
Inspect the brakes →Archived: Brakes: HYDRAULIC DISC BRAKE; Levers: HYDRAULIC DISC BRAKE; Rotors: 6-BOLTS 160mm
Wheels and tires
Check wheels and tires →Archived: Wheels: ALLOY DOUBLE WALL · Rims: ALLOY DOUBLE WALL · Hubs: F: ALLOY, 100mm 32H QR / R: ALLOY, 135mm 32H QR · Front tire: 27.5" / 29"x2.25" · Rear tire: 27.5" / 29"x2.25"
Controls and contact points
Archived: Headset: ZERO STACK W/ SEALED BEARING, ZS 44/28.6 | ZS 44/30 · Handlebar: POLYGON SPORT W: 700MM, B: 31.8MM, R/D: 20MM · Stem: POLYGON SPORT E: 40MM, B: 31.8MM, R/D: 7 · Seatpost: ALLOY SEATPOST 27.2x350mm · Saddle: BLACK STEEL ø7mm · Pedals: ONE PIECE PP BODY
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.
Have you owned this bike?Help preserve its real-world history by sharing your owner experience.
Share the details that would help another rider understand how this model fits, rides and holds up over time. Velopedia reviews every contribution before publication.
Already contributed? Send me a fresh private edit link
For privacy, Velopedia shows the same confirmation whether or not an experience exists.
Current market
Snapshot not yet availableProtected live updateReady after page interactionAutomated crawlers do not trigger marketplace requests.
Move, scroll, tap or type to start the protected update.
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.