BIKE GEOMETRY
Our bikes are designed to fit riders ranging in height from 5’ to 6’4”, using 3 distinct frame sizes, and contact points tailored to each individual frame size. Our custom bike builder asks for 3 simple body dimensions to calculate your ideal custom bike fit.
If you don't have a tape measure handy, or are buying a bike as a gift for someone else, you are still able to skip this step in the bike builder, and select a size based on the recommendation below. When you place your order, our team will follow up with you to discuss your fit, and confirm all the information we need before we build your new bike.
| Detailed Dimensions | Size 1 | Size 2 | Size 3 |
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Available Frame Style (diamond / step thru) |
 
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| Rider Height (feet) | 5'0" - 5'5" | 5'6" - 5'11" | 6'0" - 6'4" |
| Rider Height (cm) | 152 - 165cm | 167 - 180cm | 182 - 193cm |
| Head Tube Angle | 70.5° | 71.0° | 71.0° |
| Seat Tube Angle | 72.0° | 71.5° | 71.0° |
| Top-Tube Length | 580mm | 600mm | 620mm |
| Seat-Tube Length | 430mm | 485mm | 540mm |
| Chain-Stay Length | 450mm | 450mm | 450mm |
| Bottom Bracket Drop | 60mm | 60mm | 60mm |
| Fork Rake | 45mm | 45mm | 45mm |
| Fork Length | 405mm | 405mm | 405mm |
| Head-Tube Length | 145mm | 170mm | 195mm |
| Stand Over Height (diamond) | 710mm | 755mm | 795mm |
| Wheel Base | 1067mm | 1077mm | 1093mm |
Please consider that our frame geometries are also designed for the reach from saddle to handle bars to ‘grow’ as the saddle is raised. If you find yourself on the border between sizes, our recommendation is to size down for a more nimble, maneuverable feel to your ride. Or size up for a taller handle bar position and roomier cockpit.
If you are still unsure of your size, please drop us a line at hello@rollbicycles.com and we’ll help!