2024 Curtis Slack Jack Base
- Category
- All-road/Gravel
- Design
- Drop Bar, Hardtail (Front suspension)
- Frame
- Steel
- Suspension
- 40mm fork travel
- Features
- Disc brake
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Very aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Very aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
XS | S | M | L | XL | XXL | |
Stack | 553mm | 562mm | 571mm | 580mm | 589mm | 599mm |
Reach | 380mm | 390mm | 395mm | 405mm | 410mm | 420mm |
Stack to Reach Ratio | 1.46:1 | 1.44:1 | 1.45:1 | 1.43:1 | 1.44:1 | 1.43:1 |
Seat Tube Length, Unknown | 450mm | 470mm | 490mm | 510mm | 530mm | 560mm |
Top Tube Slope | 13.4deg | 12deg | 10.7deg | 9.3deg | 8.1deg | 6deg |
Head Tube Angle | 68deg | 68deg | 68deg | 68deg | 68deg | 68deg |
Seat Tube Angle | 74deg | 74deg | 74deg | 74deg | 74deg | 74deg |
Head Tube Length | 110mm | 120mm | 130mm | 140mm | 150mm | 160mm |
Bottom Bracket Drop | 76mm | 76mm | 76mm | 76mm | 76mm | 76mm |
Bottom Bracket Height | 275mm | 275mm | 275mm | 275mm | 275mm | 275mm |
Chainstay Length | 435mm | 435mm | 435mm | 435mm | 435mm | 435mm |
Chainstay Length Horizontal | 428.3mm | 428.3mm | 428.3mm | 428.3mm | 428.3mm | 428.3mm |
Trail | — — | — — | — — | — — | — — | — — |
Mechanical Trail | — | — | — | — | — | — |
Wheel Flop | — | — | — | — | — | — |
Pedal Spindle to Ground Clearance | 105mm 170 mm cranks | 105mm 170 mm cranks | 105mm 170 mm cranks | 105mm 170 mm cranks | 105mm 170 mm cranks | 105mm 170 mm cranks |
Base Build
XS | S | M | L | XL | XXL | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 40mm | 40mm | 40mm | 40mm | 40mm | 40mm |
Tire Width Max | 45mm | 45mm | 45mm | 45mm | 45mm | 45mm |
Tire Outer Diameter | 702mm | 702mm | 702mm | 702mm | 702mm | 702mm |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
All-road/GravelSource:https://www.curtisbikes.co.uk/slack-jack/