2025 Superior Bikes XF 979 RC Base Small (15.5")
Build
700C/29 in × 2.25 in
Insights
Somewhat aggressive stack and reach vs trend of full-suspension cross-country mtb bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 579mm |
| Reach | 427mm |
| Stack to Reach Ratio | 1.36:1 |
| Seat Tube Length, C-T | 393mm |
| Top Tube Length, Effective/Horizontal HT Top | 584mm |
| Head Tube Angle | 68deg |
| Effective Seat Tube Angle, ETT HT Top | 74.9deg |
| Head Tube Length | 90mm |
| Bottom Bracket Drop | 40mm |
| Bottom Bracket Height | 328.2mm |
| Chainstay Length | 428mm |
| Chainstay Length Horizontal | 426.1mm |
| Front-Center | 699mm |
| Front-Center Horizontal | 697.9mm |
| Wheelbase | 1124mm |
| Fork Offset/Rake | 44mm |
| Fork Length (Axle-To-Crown) | 517mm |
| Trail | 101.3mm very high |
| Mechanical Trail | 93.9mm |
| Wheel Flop | 35.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 160.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 158.2mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.25in |
| Tire Outer Diameter | 736.3mm |
| Bike Length with Tires | 1860.3mm |
| Crank Length | 170mm |
| Handlebar Width | 760mm |
| Stem Length | 60mm |
| Stem Angle | -7deg |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 110mm |
| Rear Travel | 105mm |
| Suspension Sag | 20% |
| Frame Material | Carbon/Composite |
| Fork Material | Unknown |
| Brake Type | Unknown |
Published Sizing Recommendations
| Height | 5 ft 4 in to 5 ft 7 in |
Source:https://superiorbikes.com/en-en/stock-bikes/product/xf-979-rc/855