2018 B'TWIN Ultra 500 AFGF
- Category
- Endurance Road
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Aluminum
- Fork
- Carbon/Composite
- Features
- Disc brake
Somewhat aggressive stack and reachvs category | Somewhat aggressive stack and reachvs category | Somewhat aggressive stack and reachvs category | Somewhat aggressive stack and reachvs category | Somewhat aggressive stack and reachvs category | Somewhat aggressive stack and reachvs category | Somewhat aggressive stack and reachvs category | Somewhat aggressive stack and reachvs category | Somewhat aggressive stack and reachvs category | Average stack and reachvs category | Average stack and reachvs category | Average stack and reachvs category | Average stack and reachvs category | Average stack and reachvs category | Average stack and reachvs category |
Geometry
Extra Small | Extra Small | XS | Small | Small | S | Medium | Medium | M | Large | Large | L | Extra Large | Extra Large | XL | |
Stack | 523mm | 523mm | 523mm | 539mm | 539mm | 539mm | 560mm | 560mm | 560mm | 586mm | 586mm | 586mm | 610mm | 610mm | 610mm |
Reach | 375mm | 375mm | 375mm | 380mm | 380mm | 380mm | 389mm | 389mm | 389mm | 391mm | 391mm | 391mm | 394mm | 394mm | 394mm |
Stack to Reach Ratio | 1.39:1 | 1.39:1 | 1.39:1 | 1.42:1 | 1.42:1 | 1.42:1 | 1.44:1 | 1.44:1 | 1.44:1 | 1.5:1 | 1.5:1 | 1.5:1 | 1.55:1 | 1.55:1 | 1.55:1 |
Seat Tube Length, C-T | — | 450mm | — | — | 480mm | — | — | 500mm | — | — | 520mm | — | — | 530mm | — |
Seat Tube Length, Unknown | — | — | 450mm | — | — | 480mm | — | — | 500mm | — | — | 520mm | — | — | 530mm |
Seat Tube Length, Effective HT Top | 450mm | — | — | 480mm | — | — | 500mm | — | — | 520mm | — | — | 530mm | — | — |
Top Tube Length, Effective/Horizontal Center | — | 525mm | — | — | 540mm | — | — | 555mm | — | — | 570mm | — | — | 580mm | — |
Top Tube Length, Effective/Horizontal HT Top | 525mm | — | 525mm | 540mm | — | 540mm | 555mm | — | 555mm | 570mm | — | 570mm | 580mm | — | 580mm |
Top Tube Slope | — | 10.3deg | 6.5deg | — | 8.7deg | 6.5deg | — | 8.6deg | 6.5deg | — | 9.2deg | 6.5deg | — | 10.5deg | 6.5deg |
Head Tube Angle | 71.5deg | 71.5deg | 71.5deg | 72deg | 72deg | 72deg | 72.5deg | 72.5deg | 72.5deg | 73deg | 73deg | 73deg | 73deg | 73deg | 73deg |
Seat Tube Angle | 74deg | 74deg | 74deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg | 74deg | 74deg | 73deg | 74deg | 74deg | 73deg |
Head Tube Length | 115mm | 115mm | 115mm | 130mm | 130mm | 130mm | 150mm | 150mm | 150mm | 175mm | 175mm | 175mm | 200mm | 200mm | 200mm |
Bottom Bracket Drop | — | — | 70mm | — | — | 70mm | — | — | 70mm | — | — | 70mm | — | — | 70mm |
Bottom Bracket Height | — | — | 266mm | — | — | 266mm | — | — | 266mm | — | — | 266mm | — | — | 266mm |
Chainstay Length | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm |
Chainstay Length Horizontal | — | — | 409.1mm | — | — | 409.1mm | — | — | 409.1mm | — | — | 409.1mm | — | — | 409.1mm |
Front-Center | — | — | 578.2mm | — | — | 584.2mm | — | — | 595.1mm | — | — | 600mm | — | — | 610mm |
Front-Center Horizontal | — | — | 574mm | — | — | 580mm | — | — | 591mm | — | — | 596mm | — | — | 606mm |
Wheelbase | 983mm | 983mm | 983mm | 989mm | 989mm | 989mm | 1000mm | 1000mm | 1000mm | 1005mm | 1005mm | 1005mm | 1015mm | 1015mm | 1015mm |
Fork Offset/Rake | — | — | 40mm | — | — | 40mm | — | — | 40mm | — | — | 40mm | — | — | 40mm |
Trail | — — | — — | 70.2mm high | — — | — — | 67.1mm high | — — | — — | 64mm mid/​neutral | — — | — — | 60.9mm mid/​neutral | — — | — — | 60.9mm mid/​neutral |
Mechanical Trail | — | — | 66.6mm | — | — | 63.8mm | — | — | 61mm | — | — | 58.2mm | — | — | 58.2mm |
Wheel Flop | — | — | 21.1mm | — | — | 19.7mm | — | — | 18.4mm | — | — | 17mm | — | — | 17mm |
Tire to Pedal Spindle | — 170 mm cranks | — 170 mm cranks | 72.2mm 170 mm cranks | — 170 mm cranks | — 170 mm cranks | 78.2mm 170 mm cranks | — 172.5 mm cranks | — 172.5 mm cranks | 86.6mm 172.5 mm cranks | — 175 mm cranks | — 175 mm cranks | 89mm 175 mm cranks | — 175 mm cranks | — 175 mm cranks | 99mm 175 mm cranks |
Pedal Spindle to Ground Clearance | — 170 mm cranks | — 170 mm cranks | 96mm 170 mm cranks | — 170 mm cranks | — 170 mm cranks | 96mm 170 mm cranks | — 172.5 mm cranks | — 172.5 mm cranks | 93.5mm 172.5 mm cranks | — 175 mm cranks | — 175 mm cranks | 91mm 175 mm cranks | — 175 mm cranks | — 175 mm cranks | 91mm 175 mm cranks |
500 AFGF Build
Extra Small | Extra Small | XS | Small | Small | S | Medium | Medium | M | Large | Large | L | Extra Large | Extra Large | 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 | 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 | 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 | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm |
Tire Width Max | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm | 32mm |
Tire Outer Diameter | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm |
Bike Length with Tires | 1655mm | 1655mm | 1655mm | 1661mm | 1661mm | 1661mm | 1672mm | 1672mm | 1672mm | 1677mm | 1677mm | 1677mm | 1687mm | 1687mm | 1687mm |
Crank Length | 170mm | 170mm | 170mm | 170mm | 170mm | 170mm | 172.5mm | 172.5mm | 172.5mm | 175mm | 175mm | 175mm | 175mm | 175mm | 175mm |
Handlebar Width | 400mm | 400mm | 400mm | 400mm | 400mm | 400mm | 400mm | 400mm | 420mm | 420mm | 420mm | 420mm | 440mm | 440mm | 440mm |
Stem Length | 80mm | 80mm | 80mm | 90mm | 90mm | 90mm | 100mm | 100mm | 100mm | 110mm | 110mm | 110mm | — | — | 120mm |
Stem Angle | — | — | 7deg | — | — | 7deg | — | — | 7deg | — | — | 7deg | — | — | 7deg |
Published Sizing Recommendations
Height | — | — | 155 cm to 166 cm | — | — | 166 cm to 173 cm | — | — | 173 cm to 182 cm | — | — | 182 cm to 186 cm | — | — | 186 cm to 200 cm |
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
Endurance RoadSource:https://geometrygeeks.bike/bike/b-twin-ultra-500-afgf-2018/, https://support.decathlon.de/ultra-520-af-gf-2018