2025 Norco Bicycles Optic 140mm Fork
- Category
- Hardtail Trail MTB
- Design
- Flat Bar, Full suspension
- Frame
- Aluminum
- Suspension
- 140mm fork travel, 125mm rear travel
- Features
- Disc brake
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | 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 |
Geometry
1 | 2 | 3 | 4 | 5 | |
Stack | 608mm | 617mm | 626mm | 635mm | 644mm |
Reach | 422.5mm | 447.5mm | 472.5mm | 497.5mm | 522.5mm |
Stack to Reach Ratio | 1.44:1 | 1.38:1 | 1.32:1 | 1.28:1 | 1.23:1 |
Seat Tube Length, Unknown | 350mm | 370mm | 385mm | 530mm | 445mm |
Head Tube Angle | 65deg | 65deg | 65deg | 65deg | 65deg |
Effective Seat Tube Angle, Unknown | 76.5deg | 76.75deg | 77deg | 77.25deg | 77.5deg |
Head Tube Length | 100mm | 110mm | 120mm | 130mm | 140mm |
Bottom Bracket Drop | 32mm | 32mm | 32mm | 32mm | 32mm |
Bottom Bracket Height | 342.5mm | 342.5mm | 342.5mm | 342.5mm | 342.5mm |
Chainstay Length | 421mm | 425mm | 429mm | 433mm | 437mm |
Chainstay Length Horizontal | 419.8mm | 423.8mm | 427.8mm | 431.8mm | 435.8mm |
Front-Center | 739.9mm | 769.9mm | 798.8mm | 827.8mm | 856.8mm |
Front-Center Horizontal | 739.2mm | 769.2mm | 798.2mm | 827.2mm | 856.2mm |
Wheelbase | 1159mm | 1193mm | 1226mm | 1259mm | 1292mm |
Fork Offset/Rake | 44mm | 44mm | 44mm | 44mm | 44mm |
Trail | 126.1mm very high | 126.1mm very high | 126.1mm very high | 126.1mm very high | 126.1mm very high |
Mechanical Trail | 114.3mm | 114.3mm | 114.3mm | 114.3mm | 114.3mm |
Wheel Flop | 48.3mm | 48.3mm | 48.3mm | 48.3mm | 48.3mm |
Standover Height | 675mm | 677mm | 678mm | 707mm | 705mm |
Tire to Pedal Spindle | 195.4mm 170 mm cranks | 225.4mm 170 mm cranks | 254.3mm 170 mm cranks | 283.3mm 170 mm cranks | 312.3mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 172.5mm 170 mm cranks | 172.5mm 170 mm cranks | 172.5mm 170 mm cranks | 172.5mm 170 mm cranks | 172.5mm 170 mm cranks |
140mm Fork Build
1 | 2 | 3 | 4 | 5 | |
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 |
Tire Width | 2.5in | 2.5in | 2.5in | 2.5in | 2.5in |
Tire Width Max | 2.6in | 2.6in | 2.6in | 2.6in | 2.6in |
Tire Outer Diameter | 749mm | 749mm | 749mm | 749mm | 749mm |
Bike Length with Tires | 1908mm | 1942mm | 1975mm | 2008mm | 2041mm |
Crank Length | 170mm | 170mm | 170mm | 170mm | 170mm |
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
Hardtail Trail MTBSource:https://www.norco.com/bikes/mountain/trail/optic/25-optic-A-framekit/