2026 RSD Bikes MiddleChild V3 Base
- Category
- Hardtail Cross-country MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Steel
- Fork
- Aluminum
- Suspension
- 140mm fork travel
- Features
- Disc brake
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 | Somewhat aggressive 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
Small | Medium | Large | XL | |
Stack | 614mm | 622mm | 632mm | 642mm |
Reach | 420mm | 458mm | 471mm | 495mm |
Stack to Reach Ratio | 1.46:1 | 1.36:1 | 1.34:1 | 1.3:1 |
Seat Tube Length, C-T | 395mm | 410mm | 440mm | 470mm |
Top Tube Length, Effective/Horizontal HT Top | 585mm | 625mm | 640mm | 667mm |
Top Tube Slope | 24deg | 21.8deg | 19.5deg | 17deg |
Head Tube Angle | 64.5deg | 64.5deg | 64.5deg | 64.5deg |
Seat Tube Angle | 75deg | 75deg | 75deg | 75deg |
Head Tube Length | 100mm | 110mm | 120mm | 130mm |
Bottom Bracket Drop | 40mm | 40mm | 40mm | 40mm |
Bottom Bracket Height | 323.1mm | 323.1mm | 323.1mm | 323.1mm |
Chainstay Length Horizontal | 415mm | 415mm | 415mm | 415mm |
Front-Center | 749.1mm | 791mm | 809mm | 836mm |
Front-Center Horizontal | 748mm | 790mm | 808mm | 835mm |
Wheelbase | 1163mm | 1205mm | 1223mm | 1250mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm |
Fork Length, Unknown | 551mm | 551mm | 551mm | 551mm |
Trail | 116.7mm very high | 116.7mm very high | 116.7mm very high | 116.7mm very high |
Mechanical Trail | 105.3mm | 105.3mm | 105.3mm | 105.3mm |
Wheel Flop | 45.3mm | 45.3mm | 45.3mm | 45.3mm |
Standover Height | 690mm | 691mm | 702mm | 711mm |
Tire to Pedal Spindle | 216mm 170 mm cranks | 257.9mm 170 mm cranks | 275.9mm 170 mm cranks | 302.8mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 153.1mm 170 mm cranks | 153.1mm 170 mm cranks | 153.1mm 170 mm cranks | 153.1mm 170 mm cranks |
Base Build
Small | Medium | Large | XL | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 2.8in | 2.8in | 2.8in | 2.8in |
Tire Outer Diameter | 726.2mm | 726.2mm | 726.2mm | 726.2mm |
Bike Length with Tires | 1889.2mm | 1931.2mm | 1949.2mm | 1976.2mm |
Stem Length | 50mm | 50mm | 50mm | 50mm |
Published Sizing Recommendations
Height | 155 cm to 170 cm | 170 cm to 178 cm | 178 cm to 185 cm | 185 cm to 195 cm |
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 Cross-country MTBSource:www.rsdbikes.com