Road bike size chart by height
Drop bars, long miles, big smiles. Get the frame size close and the rest is fine-tuning.
Road frames are usually labeled in centimeters, traditionally the seat tube length, but every brand measures and labels a little differently, so a "56" from one maker is not the same fit as a "56" from another.[1 · Oct 29, 2026] Use height to get close, then check the chart for the exact bike.
Height lookup: three published charts compared
Each column restates the height ranges published by that source, read at the rider height on the left. "Or" means the height sits on the boundary of two sizes.
| Rider height | General guide (cm)[1 · Oct 29, 2026] | Trek Domane Gen 4 size[2 · Oct 21, 2026] | BMC Teammachine R size[3 · Oct 21, 2026] |
|---|---|---|---|
| 150 cm (4′11″) | 47–48 | outside chart | 47 |
| 155 cm (5′1″) | 49–50 | 47 | 47 |
| 160 cm (5′3″) | 49–50 or 51–53 | 50 | 47 |
| 165 cm (5′5″) | 51–53 | 52 | 47 |
| 170 cm (5′7″) | 54–55 | 54 | 51 |
| 175 cm (5′9″) | 54–55 or 56–58 | 56 | 54 |
| 180 cm (5′11″) | 56–58 | 56 or 58 | 54 or 56 |
| 185 cm (6′1″) | 58–60 | 58 or 60 | 56 or 58 |
| 190 cm (6′3″) | 58–60 | 60 or 62 | 58 or 61 |
| 195 cm (6′5″) | 61–63 | 62 | 61 |
Feet and inches are converted from centimeters and rounded to the nearest inch.
Quick answers
- Between two sizes? Sizing guides commonly suggest the smaller frame. Riding style also matters: some riders size down for a more aggressive position.[4 · Oct 21, 2026]
- Inseam matters too. Trek pairs each Domane Gen 4 size with an inseam range, for example 54 cm for 78–82 cm (31–32 in) inseams and 56 cm for 81–85 cm (32–33 in).[2 · Oct 21, 2026] Long legs for your height can push you up a size.
- Compare stack and reach, not just the size label. These two numbers are independent of frame angles and let you compare brands directly.[1 · Oct 29, 2026]
- Top tube length sets how far you reach to the bars; a shorter effective top tube gives a more upright, comfortable position.[1 · Oct 29, 2026]
- Standover check: standing astride the top tube, you should be able to put both feet flat on the floor with at least 1 cm to spare.[1 · Oct 29, 2026]
- Test ride before you buy, and make sure there is enough adjustment to fine-tune the fit afterward.[1 · Oct 29, 2026]
Sources: 1. BikeRadar, Road bike sizing (re-checked Oct 29, 2026). 2. Trek, Domane SLR 7 AXS Gen 4 sizing table. 3. BMC, 2024 Teammachine R geometry (PDF). 4. Ridley's Cycle, Road bike size chart and fit guide. Checked Oct 21, 2026. Trademarks belong to their owners; charts are restated, not reproduced.