2026 Curtis Trailboss Base
- Category
- BMX/Dirt Jump
- Design
- Moto/Klunker/Riser Bar, Hardtail (Front suspension)
- Frame
- Steel
- Suspension
- 100mm fork travel
- Features
- Disc brake, Single-speed capable
Geometry
S | M | L | XL | XXL | |
Stack | 546mm | 546mm | 546mm | 546mm | 546mm |
Reach | 420mm | 430mm | 440mm | 450mm | 460mm |
Stack to Reach Ratio | 1.3:1 | 1.27:1 | 1.24:1 | 1.21:1 | 1.19:1 |
Seat Tube Length, Unknown | 330mm | 330mm | 330mm | 330mm | 330mm |
Top Tube Slope | 24deg | 23.6deg | 23.2deg | 22.8deg | 22.5deg |
Head Tube Angle | 69deg | 69deg | 69deg | 69deg | 69deg |
Seat Tube Angle | 72.5deg | 72.5deg | 72.5deg | 72.5deg | 72.5deg |
Head Tube Length | 100mm | 100mm | 100mm | 100mm | 100mm |
Bottom Bracket Drop | 25mm | 25mm | 25mm | 25mm | 25mm |
Bottom Bracket Height | 310.4mm | 310.4mm | 310.4mm | 310.4mm | 310.4mm |
Chainstay Length | 395mm | 395mm | 395mm | 395mm | 395mm |
Chainstay Length Horizontal | 394.2mm | 394.2mm | 394.2mm | 394.2mm | 394.2mm |
Front-Center | 663.3mm | 673.3mm | 683.3mm | 693.3mm | 703.3mm |
Front-Center Horizontal | 662.8mm | 672.8mm | 682.8mm | 692.8mm | 702.8mm |
Wheelbase | 1057.1mm | 1067.1mm | 1077.1mm | 1087.1mm | 1097.1mm |
Fork Offset/Rake | 40mm | 40mm | 40mm | 40mm | 40mm |
Fork Length (Axle-To-Crown) | 482mm | 482mm | 482mm | 482mm | 482mm |
Trail | 85.9mm very high | 85.9mm very high | 85.9mm very high | 85.9mm very high | 85.9mm very high |
Mechanical Trail | 80.2mm | 80.2mm | 80.2mm | 80.2mm | 80.2mm |
Wheel Flop | 28.7mm | 28.7mm | 28.7mm | 28.7mm | 28.7mm |
Tire to Pedal Spindle | 157.9mm 170 mm cranks | 167.9mm 170 mm cranks | 177.9mm 170 mm cranks | 187.9mm 170 mm cranks | 197.9mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 140.4mm 170 mm cranks | 140.4mm 170 mm cranks | 140.4mm 170 mm cranks | 140.4mm 170 mm cranks | 140.4mm 170 mm cranks |
Base Build
S | M | L | XL | XXL | |
Wheel Size | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD |
Tire Width | 2.2in | 2.2in | 2.2in | 2.2in | 2.2in |
Tire Outer Diameter | 670.8mm | 670.8mm | 670.8mm | 670.8mm | 670.8mm |
Bike Length with Tires | 1727.8mm | 1737.8mm | 1747.8mm | 1757.8mm | 1767.8mm |
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
BMX/Dirt JumpSource:curtisbikes.co.uk