2021 Specialized Bicycles Hotrock Base
- Category
- Kids MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Suspension
- NaNmm fork travel
- Features
- Rim brake
Geometry
20 | 24 | |
Stack | 448mm | 540mm |
Reach | 320mm | 354mm |
Stack to Reach Ratio | 1.4:1 | 1.53:1 |
Seat Tube Length, Unknown | 279mm | 312mm |
Top Tube Length, Effective/Horizontal Center | 465mm | 519mm |
Top Tube Slope | 24.2deg | 28.5deg |
Head Tube Angle | 69deg | 69deg |
Seat Tube Angle | 72deg | 73deg |
Head Tube Length | 110mm | 130mm |
Bottom Bracket Drop | 20mm | 35mm |
Bottom Bracket Height | 236.3mm | 271.8mm |
Chainstay Length | 390mm | 410mm |
Chainstay Length Horizontal | 389.5mm | 408.5mm |
Front-Center | 527mm | 592mm |
Front-Center Horizontal | 526.5mm | 590.5mm |
Wheelbase | 916mm | 999mm |
Fork Offset/Rake | 40mm | 40mm |
Fork Length (Axle-To-Crown) | 352mm | 415mm |
Trail | 55.6mm mid/neutral | 74.9mm high |
Mechanical Trail | 51.9mm | 70mm |
Wheel Flop | 18.6mm | 25.1mm |
Standover Height | 468mm | 548mm |
Tire to Pedal Spindle | 143.7mm 127 mm cranks | 133.2mm 152 mm cranks |
Pedal Spindle to Ground Clearance | 109.3mm 127 mm cranks | 119.8mm 152 mm cranks |
Base Build
20 | 24 | |
Wheel Size | 20 in (406) 406 mm BSD | 24 in 507 mm BSD |
Tire Width | 2.1in | 2.1in |
Tire Outer Diameter | 512.7mm | 613.7mm |
Bike Length with Tires | 1428.7mm | 1612.7mm |
Crank Length | 127mm | 152mm |
Handlebar Width | 580mm | 600mm |
Stem Length | 70mm | 70mm |
Stem Angle | 20deg | 20deg |
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:https://www.specialized.com/us/en/hotrock-20/p/184498