2015 Rocky Mountain Thunderbolt 750 XL
Build
650B/27.5 in × 2.3 in
Insights
Somewhat aggressive stack and reach vs trend of full-suspension cross-country mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 586mm |
| Reach | 469mm |
| Stack to Reach Ratio | 1.25:1 |
| Seat Tube Length, C-T | 521mm |
| Top Tube Length, Effective/Horizontal HT Top | 645mm |
| Top Tube Slope | 8deg |
| Head Tube Angle | 67.2deg |
| Seat Tube Angle | 73.7deg |
| Head Tube Length | 145mm |
| Bottom Bracket Drop | 25.2mm |
| Bottom Bracket Height | 325.2mm |
| Chainstay Length | 422mm |
| Chainstay Length Horizontal | 421.3mm |
| Front-Center | 763.2mm |
| Front-Center Horizontal | 762.8mm |
| Wheelbase | 1184mm |
| Fork Offset/Rake | 53.5mm |
| Trail | 89.3mm very high |
| Mechanical Trail | 82.3mm |
| Wheel Flop | 31.9mm |
| Standover Height | 696mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 242.8mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 155.2mm |
750 Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.3in |
| Tire Outer Diameter | 700.8mm |
| Bike Length with Tires | 1884.8mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 120mm |
| Rear Travel | 120mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.bikes.com/en/bikes/thunderbolt/2015