2020 Rocky Mountain Thunderbolt Alloy 50 Neutral
- Category
- Full-suspension Trail MTB
- Design
- Flat Bar, Full suspension
- Frame
- Aluminum
- Suspension
- 140mm fork travel, 25% sag
- Features
- Disc brake
Geometry
XS | S | M | L | XL | |
Stack | 579mm | 588mm | 598mm | 607mm | 626mm |
Reach | 386mm | 414mm | 436mm | 459mm | 479mm |
Stack to Reach Ratio | 1.5:1 | 1.42:1 | 1.37:1 | 1.32:1 | 1.31:1 |
Seat Tube Length, C-T | 356mm | 394mm | 432mm | 471mm | 509mm |
Top Tube Length, Effective/Horizontal Unknown | 546mm | 576mm | 601mm | 626mm | 658mm |
Head Tube Angle | 66.6deg | 66.6deg | 66.6deg | 66.6deg | 66.6deg |
Effective Seat Tube Angle, Unknown | 74.6deg | 74.6deg | 74.6deg | 74.6deg | 74.6deg |
Head Tube Length | 100mm | 110mm | 120mm | 130mm | 145mm |
Bottom Bracket Drop | 17mm | 17mm | 17mm | 17mm | 17mm |
Bottom Bracket Height | 336mm | 336mm | 336mm | 336mm | 336mm |
Chainstay Length Horizontal | 425mm | 425mm | 425mm | 425mm | 425mm |
Front-Center | 678.2mm | 710.2mm | 736.2mm | 763.2mm | 795.2mm |
Front-Center Horizontal | 678mm | 710mm | 736mm | 763mm | 795mm |
Wheelbase | 1103mm | 1135mm | 1161mm | 1188mm | 1220mm |
Fork Offset/Rake | 37mm | 37mm | 37mm | 37mm | 37mm |
Trail | 112.4mm very high | 112.4mm very high | 112.4mm very high | 112.4mm very high | 112.4mm very high |
Mechanical Trail | 103.2mm | 103.2mm | 103.2mm | 103.2mm | 103.2mm |
Wheel Flop | 41mm | 41mm | 41mm | 41mm | 41mm |
Standover Height | 802mm | 802mm | 802mm | 802mm | 802mm |
Tire to Pedal Spindle | 155.3mm 170 mm cranks | 187.2mm 170 mm cranks | 213.2mm 170 mm cranks | 240.2mm 170 mm cranks | 272.2mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 166mm 170 mm cranks | 166mm 170 mm cranks | 166mm 170 mm cranks | 166mm 170 mm cranks | 166mm 170 mm cranks |
Alloy 50 Neutral Build
XS | S | M | L | 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 | 650B/27.5 in 584 mm BSD |
Tire Width | 2.4in | 2.4in | 2.4in | 2.4in | 2.4in |
Tire Width Max | 2.5in | 2.5in | 2.5in | 2.5in | 2.5in |
Tire Outer Diameter | 705.9mm | 705.9mm | 705.9mm | 705.9mm | 705.9mm |
Bike Length with Tires | 1808.9mm | 1840.9mm | 1866.9mm | 1893.9mm | 1925.9mm |
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
Full-suspension Trail MTBSource:https://www.bikes.com/en/bikes/thunderbolt/2020