2025 Radical Bicycle Co. Grim Ripper 29 Regular
Build
700C/29 in × 2.4 in
Insights
Average stack and reach vs trend of hardtail trail mtb bikes
Design deviates from other sizes of Radical Bicycle Co. Grim Ripper
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 640mm |
| Reach | 460mm |
| Stack to Reach Ratio | 1.39:1 |
| Seat Tube Length, C-T | 400mm |
| Top Tube Length, Effective/Horizontal HT Top | 607mm |
| Top Tube Slope | 24.5deg |
| Head Tube Angle | 64deg |
| Seat Tube Angle | 77.5deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 55mm |
| Bottom Bracket Height | 317mm |
| Chainstay Length | 425mm |
| Chainstay Length Max | 440mm |
| Chainstay Length Horizontal | 421.4mm |
| Chainstay Length Horizontal Max | 436.6mm |
| Front-Center | 798.5mm |
| Front-Center Horizontal | 796.6mm |
| Wheelbase | 1218mm |
| Wheelbase Max | 1233mm |
| Fork Offset/Rake | 46mm |
| Fork Length, Unknown | 543mm |
| Trail | 130.2mm very high |
| Mechanical Trail | 117.1mm |
| Wheel Flop | 51.3mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 256.5mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 147mm |
29 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 1961.9mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 130mm |
| Suspension Sag | 0% |
| Frame Material | Steel |
| Fork Material | N/A |
| Brake Type | Disc |
| Features | Single-speed capable |
Published Sizing Recommendations
| Height | 5 ft 5.5 in to 5 ft 11.5 in |
Source:https://cdn.shopify.com/s/files/1/0448/4762/8451/files/Grim_Ripper_MK2_Steel_Geo_Chart_2179cd32-bfdf-4b6d-8107-7d6e352de1d1.png?v=1741366878