2025 Superior Bikes XF 979 RC Base
- Design
- Flat Bar, Full suspension
- Frame
- Carbon/Composite
- Suspension
- 110mm fork travel, 105mm rear travel, 20% sag
Geometry
Small (15.5") | Medium (17.5") | Large (19") | XL (21") | |
Stack | 579mm | 589mm | 597mm | 607mm |
Reach | 427mm | 449mm | 465mm | 482mm |
Stack to Reach Ratio | 1.36:1 | 1.31:1 | 1.28:1 | 1.26:1 |
Seat Tube Length, C-T | 393mm | 431mm | 482mm | 533mm |
Top Tube Length, Effective/Horizontal HT Top | 584mm | 610mm | 630mm | 650mm |
Head Tube Angle | 68deg | 68deg | 68deg | 68deg |
Effective Seat Tube Angle, ETT HT Top | 74.9deg | 74.7deg | 74.6deg | 74.5deg |
Head Tube Length | 90mm | 100mm | 110mm | 120mm |
Bottom Bracket Drop | 40mm | 40mm | 40mm | 40mm |
Bottom Bracket Height | 328.2mm | 328.2mm | 328.2mm | 328.2mm |
Chainstay Length | 428mm | 428mm | 428mm | 428mm |
Chainstay Length Horizontal | 426.1mm | 426.1mm | 426.1mm | 426.1mm |
Front-Center | 699mm | 724mm | 744mm | 763.9mm |
Front-Center Horizontal | 697.9mm | 722.9mm | 742.9mm | 762.9mm |
Wheelbase | 1124mm | 1149mm | 1169mm | 1189mm |
Fork Offset/Rake | 44mm | 44mm | 44mm | 44mm |
Fork Length (Axle-To-Crown) | 517mm | 517mm | 517mm | 517mm |
Trail | 101.3mm very high | 101.3mm very high | 101.3mm very high | 101.3mm very high |
Mechanical Trail | 93.9mm | 93.9mm | 93.9mm | 93.9mm |
Wheel Flop | 35.2mm | 35.2mm | 35.2mm | 35.2mm |
Tire to Pedal Spindle | 160.9mm 170 mm cranks | 180.8mm 175 mm cranks | 200.8mm 175 mm cranks | 220.8mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 158.2mm 170 mm cranks | 153.2mm 175 mm cranks | 153.2mm 175 mm cranks | 153.2mm 175 mm cranks |
Base Build
Small (15.5") | Medium (17.5") | Large (19") | XL (21") | |
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 |
Tire Width | 2.25in | 2.25in | 2.25in | 2.25in |
Tire Outer Diameter | 736.3mm | 736.3mm | 736.3mm | 736.3mm |
Bike Length with Tires | 1860.3mm | 1885.3mm | 1905.3mm | 1925.3mm |
Crank Length | 170mm | 175mm | 175mm | 175mm |
Handlebar Width | 760mm | 760mm | 760mm | 760mm |
Stem Length | 60mm | 60mm | 80mm | 80mm |
Stem Angle | -7deg | -7deg | -7deg | -7deg |
Published Sizing Recommendations
Height | 5 ft 4 in to 5 ft 7 in | 5 ft 7 in to 5 ft 10 in | 5 ft 10 in to 6 ft 1 in | 6 ft 1 in to 6 ft 5 in |
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
Full-suspension Cross-country MTBSource:https://superiorbikes.com/en-en/stock-bikes/product/xf-979-rc/855