
Velopedia Bicycle Archive
2018 Cannondale Jekyll 4
Original manufacturer specifications including 27.5" wheels, geometry for 4 published sizes.
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What Velopedia knows
- Model year
- 2018
- Category
- Mountain
- Sizes
- S, M, L, XL
- Colors
- Satin Jet Black w/ Gloss Hazard Orange, Aqua Blue and Charcoal Gray - (BLK)
- Geometry
- 4 manufacturer sizes · Geometry context
- Record coverage
- 24 preserved details · archived image · preserved geometry
- Archive ID
- 900002557
Model history 5 other years
Frameset
| Frame Construction | All-New Jekyll, 165mm travel, SmartForm C1 Alloy, carbon shock link, Ai offset drivetrain, ISCG05, BB30, flat mount brake, tapered headtube |
|---|---|
| Frame Material | Carbon |
| Fork | Fox Float 36 Performance, 27.5, 170mm, 110x15, tapered steerer, 44mm offset |
| Rear Shock | Fox Float Performance DPS EVOL w/ Gemini remote-actuated dual mode air spring system, Flow Mode - 165mm / Hustle Mode - 130mm |
Drivetrain
| Shifters | Shimano SLX, 11-speed |
|---|---|
| Front Derailleur | N/A |
| Rear Derailleur | Shimano SLX, 11-speed |
| Crankset | Cannondale Si, BB30, SpideRing 30T, Ai offset |
| Bottom Bracket | Cannondale BB30 |
| Rear Cogs | Shimano SLX, 11-speed, 11-46 |
| Chain | KMC X11, 11-speed |
| Pedals | N/A |
Brakes
| Brakes | Shimano Deore MT500 hydro disc, 180/180mm |
|---|
Cockpit & Contact Points
| Headset | Integrated, 1-1/8 to 1.5”, sealed angular contact bearings |
|---|---|
| Handlebar | Cannondale C3 Riser, 6061 Alloy, 15mm rise, 4° up, 9° back, 31.8, 780mm |
| Stem | Cannondale C3, 6061 Alloy, 1-1/8”, 31.8, 0°, 35mm |
| Saddle | Fabric Radius Scoop |
| Seatpost | TransX dropper, Internal Routing, 31.6, 120mm drop |
Wheels & Tires
| Hubs | Formula w/ HG driver - 110x15 thru front / 148x12 thru rear w/Ai offset |
|---|---|
| Rims | WTB STP i25, 25mm inner, TCS Tubeless Ready 27.5”, 32h |
| Spokes | DT Swiss Champion 2.0 |
| Front Tire | Maxxis Minion DHF 27.5x2.5” front, DHR II 2.4” rear, Dual Compound, folding, Tubeless Ready |
| Rear Tire | Maxxis Minion DHF 27.5x2.5” front, DHR II 2.4” rear, Dual Compound, folding, Tubeless Ready |
| 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 | S | M | L | XL |
|---|---|---|---|---|
| Seat tube | 400 mm | 430 mm | 460 mm | 520 mm |
| Effective top tube | 584 mm | 609 mm | 634 mm | 662 mm |
| Top tube | 537 mm | 562 mm | 587 mm | 621 mm |
| Head tube | 102 mm | 115 mm | 127 mm | 140 mm |
| Head-tube angle | 65° | 65° | 65° | 65° |
| Seat-tube angle | 75° | 75° | 75° | 75° |
| Chainstay / rear center | 420 mm | 420 mm | 420 mm | 420 mm |
| Wheelbase | 1160 mm | 1187 mm | 1214 mm | 1244 mm |
| Bottom-bracket drop | 8 mm | 8 mm | 8 mm | 8 mm |
| Bottom-bracket height | 349 mm | 349 mm | 349 mm | 349 mm |
| Reach | 425 mm | 447 mm | 469 mm | 494 mm |
| Stack | 592 mm | 604 mm | 615 mm | 626 mm |
| Standover height | 750 mm | 758 mm | 767 mm | 775 mm |
| Fork offset / rake | 44 mm | 44 mm | 44 mm | 44 mm |
| Front center | 740 mm | 767 mm | 794 mm | 824 mm |
| Trail | 114 mm | 114 mm | 114 mm | 114 mm |
Geometry source: Cannondale MY18 Dealer Book, PDF page 183 Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
S geometry
Archive context: Its bottom-bracket drop of 8 mm sits toward the shallower-drop end. The head angle of 65° sits toward the slacker end. Its wheelbase of 1160 mm sits toward the longer end.
Compared with 56 distinct mountain geometries in the Small-equivalent size cohort from model years 2016–2020 in the Velopedia archive.M geometry
Archive context: Its bottom-bracket drop of 8 mm sits toward the shallower-drop end. The head angle of 65° sits toward the slacker end. The chainstay of 420 mm sits toward the shorter rear-center end.
Compared with 59 distinct mountain geometries in the Medium-equivalent size cohort from model years 2016–2020 in the Velopedia archive.L geometry
Archive context: Its bottom-bracket drop of 8 mm sits toward the shallower-drop end. The head angle of 65° sits toward the slacker end. The chainstay of 420 mm sits toward the shorter rear-center end.
Compared with 57 distinct mountain geometries in the Large-equivalent size cohort from model years 2016–2020 in the Velopedia archive.XL geometry
Archive context: Its bottom-bracket drop of 8 mm sits toward the shallower-drop end. The head angle of 65° sits toward the slacker end. The chainstay of 420 mm sits toward the shorter rear-center end.
Compared with 53 distinct mountain geometries in the XL-equivalent size cohort from model years 2016–2020 in the Velopedia archive.Parts & serviceability
Find replacement parts
More qualified parts (4)
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 →- FrameInspect the composite sections for impact or clamp damage, then check the metal joints and welds for dents or cracking. Ask about any crash history.Inspect the frame and fork →
- BrakesBoth brakes should stop firmly and release without rubbing. Inspect pad thickness, rotor wear and alignment, and check the cables or hoses for damage.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 every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 11-speed system.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. If it is set up tubeless, confirm both tires hold pressure and ask when the sealant was last refreshed.Check wheels and tires →
Bike-specific inspection checklist 23 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: 2018 Cannondale Jekyll 4 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: All-New Jekyll, 165mm travel, SmartForm C1 Alloy, carbon shock link, Ai offset drivetrain, ISCG05, BB30, flat mount brake, tapered headtube · Fork: Fox Float 36 Performance, 27.5, 170mm, 110x15, tapered steerer, 44mm offset
Suspension
Evaluate the suspension →Archived: Fork: Fox Float 36 Performance, 27.5, 170mm, 110x15, tapered steerer, 44mm offset · Rear shock: Fox Float Performance DPS EVOL w/ Gemini remote-actuated dual mode air spring system, Flow Mode - 165mm / Hustle Mode - 130mm
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano SLX, 11-speed · Rear derailleur: Shimano SLX, 11-speed · Crankset: Cannondale Si, BB30, SpideRing 30T, Ai offset · Bottom bracket: Cannondale BB30 · Rear cogs: Shimano SLX, 11-speed, 11-46 · Chain: KMC X11, 11-speed
Brakes
Inspect the brakes →Archived: Brakes: Shimano Deore MT500 hydro disc, 180/180mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 27.5" · Rims: WTB STP i25, 25mm inner, TCS Tubeless Ready 27.5”, 32h · Hubs: Formula w/ HG driver - 110x15 thru front / 148x12 thru rear w/Ai offset · Front tire: Maxxis Minion DHF 27.5x2.5” front, DHR II 2.4” rear, Dual Compound, folding, Tubeless Ready · Rear tire: Maxxis Minion DHF 27.5x2.5” front, DHR II 2.4” rear, Dual Compound, folding, Tubeless Ready
Controls and contact points
Archived: Headset: Integrated, 1-1/8 to 1.5”, sealed angular contact bearings · Handlebar: Cannondale C3 Riser, 6061 Alloy, 15mm rise, 4° up, 9° back, 31.8, 780mm · Stem: Cannondale C3, 6061 Alloy, 1-1/8”, 31.8, 0°, 35mm · Seatpost: TransX dropper, Internal Routing, 31.6, 120mm drop · Saddle: Fabric Radius Scoop
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.




