2026 roko.bike Mountain Base
- Category
- Kids MTB
- Design
- Flat Bar, Rigid, non-suspension corrected
- Frame
- Aluminum
- Fork
- Aluminum
- Features
- Disc brake
Geometry
16" | 20" | 24" | |
Stack | 338mm | 421mm | 491mm |
Reach | 267mm | 322mm | 354mm |
Stack to Reach Ratio | 1.27:1 | 1.31:1 | 1.39:1 |
Seat Tube Length, Unknown | 220mm | 250mm | 310mm |
Top Tube Length, Effective/Horizontal HT Top | 390mm | 435mm | 485mm |
Top Tube Slope | 21deg | 24.9deg | 23.8deg |
Head Tube Angle | 68.5deg | 66deg | 66deg |
Seat Tube Angle | 70deg | 75deg | 75deg |
Bottom Bracket Drop | 15mm | 50mm | 65mm |
Bottom Bracket Height | 203.3mm | 208.9mm | 244.4mm |
Chainstay Length | 290mm | 325mm | 380mm |
Chainstay Length Horizontal | 289.6mm | 321.1mm | 374.4mm |
Front-Center | 432.7mm | 539.2mm | 596.2mm |
Front-Center Horizontal | 432.4mm | 536.9mm | 592.6mm |
Wheelbase | 722mm | 858mm | 967mm |
Fork Offset/Rake | 35.5mm | 45.4mm | 44.7mm |
Trail | 47.8mm mid/neutral | 65.6mm high | 88.8mm very high |
Mechanical Trail | 44.5mm | 59.9mm | 81.1mm |
Wheel Flop | 16.3mm | 24.4mm | 33mm |
Standover Height | 430mm | 490mm | 600mm |
Tire to Pedal Spindle | 122.4mm 92 mm cranks | 166.3mm 114 mm cranks | 159.8mm 127 mm cranks |
Pedal Spindle to Ground Clearance | 111.3mm 92 mm cranks | 94.9mm 114 mm cranks | 117.4mm 127 mm cranks |
Base Build
16" | 20" | 24" | |
Wheel Size | 335mm BSD 335 mm BSD | 20 in (406) 406 mm BSD | 24 in 507 mm BSD |
Tire Width | 2in | 2.2in | 2.2in |
Tire Outer Diameter | 436.6mm | 517.8mm | 618.8mm |
Bike Length with Tires | 1158.6mm | 1375.8mm | 1585.8mm |
Crank Length | 92mm | 114mm | 127mm |
Handlebar Width | 460mm | 540mm | 580mm |
Stem Length | — | 35mm | 35mm |
Published Sizing Recommendations
Height | 94 cm to 116 cm | 105 cm to 125 cm | 115 cm to 135 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
Kids MTBSource:roko.bike