2019 Opus Bike Spark 4 M
Build
700C/29 in × 33 mm
Insights
Somewhat upright stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 582mm |
| Reach | 377mm |
| Stack to Reach Ratio | 1.54:1 |
| Seat Tube Length, Unknown | 540mm |
| Top Tube Length, Effective/Horizontal Unknown | 555mm |
| Top Tube Slope | 7deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 159mm |
| Bottom Bracket Drop | 68mm |
| Bottom Bracket Height | 276mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 429.7mm |
| Trail | — — |
| Standover Height | 830mm |
| Tire to Pedal Spindle Distance With 175 mm cranks | — |
| Pedal Spindle to Ground Clearance With 175 mm cranks | 101mm |
4 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 33mm |
| Tire Outer Diameter | 688mm |
| Crank Length | 175mm |
| Handlebar Width | 420mm |
| Stem Length | 100mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.opusbike.com/en/product/adventure/169-spark-4.html?CouleurId=163