2021 Thomson Bike Products Piedmont Base
- Category
- All-road/Gravel
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Titanium
- Fork
- Carbon/Composite
- Features
- Disc brake
Geometry
XS | S | M | L | XL | |
Stack | 515mm | 531mm | 566mm | 593mm | 618mm |
Reach | 374mm | 380mm | 384mm | 397mm | 410mm |
Stack to Reach Ratio | 1.38:1 | 1.4:1 | 1.47:1 | 1.49:1 | 1.51:1 |
Seat Tube Length, Unknown | 401mm | 451mm | 491mm | 511mm | 511mm |
Top Tube Length, Unknown | 522mm | 532mm | 546mm | 567mm | 587mm |
Top Tube Slope | 15deg | 10.9deg | 10.3deg | 10.7deg | 13deg |
Head Tube Angle | 70deg | 70deg | 70deg | 70deg | 70deg |
Seat Tube Angle | 74deg | 74deg | 74deg | 74deg | 74deg |
Head Tube Length | 97mm | 114mm | 151mm | 180mm | 206mm |
Bottom Bracket Drop | 70mm | 70mm | 70mm | 70mm | 70mm |
Bottom Bracket Height | 281mm | 281mm | 281mm | 281mm | 281mm |
Chainstay Length | 428mm | 428mm | 428mm | 428mm | 428mm |
Chainstay Length Horizontal | 422.2mm | 422.2mm | 422.2mm | 422.2mm | 422.2mm |
Front-Center | 588mm | 599mm | 616mm | 639mm | 661mm |
Front-Center Horizontal | 583.8mm | 595.8mm | 612.8mm | 635.8mm | 656.8mm |
Wheelbase | 1006mm | 1018mm | 1035mm | 1058mm | 1079mm |
Fork Offset/Rake | 45mm | 45mm | 45mm | 45mm | 45mm |
Fork Length (Axle-To-Crown) | 395mm | 395mm | 395mm | 395mm | 395mm |
Trail | 79.9mm high | 79.9mm high | 79.9mm high | 79.9mm high | 79.9mm high |
Mechanical Trail | 75.1mm | 75.1mm | 75.1mm | 75.1mm | 75.1mm |
Wheel Flop | 25.7mm | 25.7mm | 25.7mm | 25.7mm | 25.7mm |
Tire to Pedal Spindle | 67mm 170 mm cranks | 78mm 170 mm cranks | 95mm 170 mm cranks | 118mm 170 mm cranks | 140mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 111mm 170 mm cranks | 111mm 170 mm cranks | 111mm 170 mm cranks | 111mm 170 mm cranks | 111mm 170 mm cranks |
Base Build
XS | S | M | L | XL | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 40mm | 40mm | 40mm | 40mm | 40mm |
Tire Outer Diameter | 702mm | 702mm | 702mm | 702mm | 702mm |
Bike Length with Tires | 1708mm | 1720mm | 1737mm | 1760mm | 1781mm |
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
All-road/GravelSource:https://www.bikethomson.com/product/gravel-bike-kit-piedmont/#frame