Rear tire: 27.5×2.5.
Velopedia Bicycle Archive
2019 Cannondale Jekyll 1 27.5
Original specifications: 27.5" wheels · geometry for 4 published sizes.
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At a glance
Archive #900002814- Model year
- 2019
- Category
- Mountain
- Sizes
- S, M, L, XL
- Colors
- Tangerine w/ Graphite - Gloss (TNG)
- Geometry
- 4 manufacturer sizes
- In this record
- 23 specifications · archived image · geometry
Original buildCarbon · 27.5"
Frameset
| Frame Construction | Jekyll, 165mm travel, BallisTec Carbon Frame and Swingarm, carbon shock link, Ai offset drivetrain, ISCG05, PF30, flat mount brake, tapered headtube |
|---|---|
| Frame Material | Carbon |
| Fork | Fox Float Factory 36, 170mm, FIT Grip2 Damper, Kashima coating, 15x110, tapered steerer, 44mm offset |
| Rear Shock | Fox Float Factory DPX2 EVOL w/ Gemini dual mode air spring system (Flow Mode - 165mm / Hustle Mode - 130mm), remote-actuated, 3-Pos adj. |
Drivetrain
| Shifters | SRAM X01 Eagle, 12-speed |
|---|---|
| Rear Derailleur | SRAM XX1 Eagle |
| Crankset | Truvativ Descendant Carbon, 30T, Ai Custom |
| Bottom Bracket | Cannondale Alloy PressFit30 |
| Rear Cogs | SRAM XG-1295, X01 Eagle, 10-50, 12-speed |
| Chain | SRAM X01 Eagle, 12-speed |
| Pedals | Not Included |
Brakes
| Brakes | SRAM Code RSC hydro disc, 200/180mm Centerline rotors |
|---|
Cockpit & Contact Points
| Headset | Integrated, 1-1/8 to 1.5”, sealed angular contact bearings |
|---|---|
| Handlebar | Cannondale C1 Riser, Carbon, 15mm rise, 9° sweep, 4° rise, 780mm |
| Stem | Cannondale C1, 3D Forged 6061 Alloy, 1-1/8”, 31.8, 0°, 35mm |
| Saddle | Fabric Scoop Shallow Race, ti rails |
| Seatpost | Fox Transfer dropper, internal routing, 31.6, 125mm (S), 150mm (M-XL) |
Wheels & Tires
| Hubs | HollowGram 30 - 15x110 front, 12x148 rear, straight pull w/ XD driver |
|---|---|
| Rims | Cannondale HollowGram 30 Carbon, 30mm ID, tubeless ready |
| Spokes | HollowGram, double-butted straight pull (Ai Offset dish - rear) |
| Front Tire | Maxxis Minion DHF 27.5 x 2.5” front, DHR II 2.4” rear, 3C Compound, EXO puncture protection, tubeless ready |
| Rear Tire | Maxxis Minion DHF 27.5 x 2.5” front, DHR II 2.4” rear, 3C Compound, EXO puncture protection, tubeless ready |
| Wheel Size | 27.5" |
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Geometry
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 16 measurements
| 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 |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
How it works
Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.
Speeds are estimates from tire size and pedal cadence. Actual speeds vary.
Try your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| Measure | Original | Your setup |
|---|---|---|
| Lowest ratio | — | — |
| Highest ratio | — | — |
| Total range | — | — |
| Lowest-gear speed | — | — |
| Highest-gear speed | — | — |
Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.
Parts & serviceability
Find replacement parts
12-speed

SRAM GX Eagle 12-Speed Chain Silver, 126 links
Replacement option
DHR II 2.4” rear, 3C Compound, EXO puncture protection, tubeless ready

Maxxis Minion DHF Wide Trail Dual Compound/EXO/TR 27.5in Tire Dual Compound/EXO/TR, 27.5x2.5
Replacement option
X01 Eagle, 10-50, 12-speed
More parts (4)Fewer parts
ti rails
12-speed
Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.internal routing, 31.6, 125mm (S), 150mm (M-XL)
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Service essentialsQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- Maxxis Minion DHF 27.5 x 2.5” front, DHR II 2.4” rear, 3C Compound, EXO puncture protection, tubeless readyCheck: Verify the fitted tire’s size marking and rim type.
- Rear tire
- Maxxis Minion DHF 27.5 x 2.5” front, DHR II 2.4” rear, 3C Compound, EXO puncture protection, tubeless readyCheck: Verify the rear size; it may differ from the front.
- Drivetrain
- 12-speedCheck: Match the installed drivetrain family, not just its speed count.
- Seatpost diameter
- 31.6 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
- Bottom bracket / shell
- Cannondale Alloy PressFit30Check: Verify shell type and width, crank interface, and spindle length or spacers.
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: 2019 Cannondale Jekyll 1 27.5 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Jekyll, 165mm travel, BallisTec Carbon Frame and Swingarm, carbon shock link, Ai offset drivetrain, ISCG05, PF30, flat mount brake, tapered headtube · Fork: Fox Float Factory 36, 170mm, FIT Grip2 Damper, Kashima coating, 15x110, tapered steerer, 44mm offset
Suspension
Evaluate the suspension →Archived: Fork: Fox Float Factory 36, 170mm, FIT Grip2 Damper, Kashima coating, 15x110, tapered steerer, 44mm offset · Rear shock: Fox Float Factory DPX2 EVOL w/ Gemini dual mode air spring system (Flow Mode - 165mm / Hustle Mode - 130mm), remote-actuated, 3-Pos adj.
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM X01 Eagle, 12-speed · Rear derailleur: SRAM XX1 Eagle · Crankset: Truvativ Descendant Carbon, 30T, Ai Custom · Bottom bracket: Cannondale Alloy PressFit30 · Rear cogs: SRAM XG-1295, X01 Eagle, 10-50, 12-speed · Chain: SRAM X01 Eagle, 12-speed
Brakes
Inspect the brakes →Archived: Brakes: SRAM Code RSC hydro disc, 200/180mm Centerline rotors
Wheels and tires
Check wheels and tires →Archived: Wheel size: 27.5" · Rims: Cannondale HollowGram 30 Carbon, 30mm ID, tubeless ready · Hubs: HollowGram 30 - 15x110 front, 12x148 rear, straight pull w/ XD driver · Front tire: Maxxis Minion DHF 27.5 x 2.5” front, DHR II 2.4” rear, 3C Compound, EXO puncture protection, tubeless ready · Rear tire: Maxxis Minion DHF 27.5 x 2.5” front, DHR II 2.4” rear, 3C Compound, EXO puncture protection, tubeless ready
Controls and contact points
Archived: Headset: Integrated, 1-1/8 to 1.5”, sealed angular contact bearings · Handlebar: Cannondale C1 Riser, Carbon, 15mm rise, 9° sweep, 4° rise, 780mm · Stem: Cannondale C1, 3D Forged 6061 Alloy, 1-1/8”, 31.8, 0°, 35mm · Seatpost: Fox Transfer dropper, internal routing, 31.6, 125mm (S), 150mm (M-XL) · Saddle: Fabric Scoop Shallow Race, ti rails · Pedals: Not Included
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.