2025 Norco Bicycles Optic 140mm Fork 3
Build
700C/29 in × 2.5 in
Insights
Average stack and reach vs trend of hardtail trail mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 626mm |
| Reach | 472.5mm |
| Stack to Reach Ratio | 1.32:1 |
| Seat Tube Length, Unknown | 385mm |
| Head Tube Angle | 65deg |
| Effective Seat Tube Angle, Unknown | 77deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 32mm |
| Bottom Bracket Height | 342.5mm |
| Chainstay Length | 429mm |
| Chainstay Length Horizontal | 427.8mm |
| Front-Center | 798.8mm |
| Front-Center Horizontal | 798.2mm |
| Wheelbase | 1226mm |
| Fork Offset/Rake | 44mm |
| Trail | 126.1mm very high |
| Mechanical Trail | 114.3mm |
| Wheel Flop | 48.3mm |
| Standover Height | 678mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 254.3mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 172.5mm |
140mm Fork Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.5in |
| Tire Outer Diameter | 749mm |
| Bike Length with Tires | 1975mm |
| Crank Length | 170mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 140mm |
| Rear Travel | 125mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.norco.com/bikes/mountain/trail/optic/25-optic-A-framekit/