Time Trial Bike Sizing Guide
Time Trial (TT) and Triathlon bikes are designed for speed. That’s why they have an aero design, TT bars, aero wheels and a low front end. It’s more important than ever to get the right size TT bike so that you’re in the most aerodynamic riding position. It’s especially important if you’re racing over long distances..
What’s the right TT bike size for me?
This handy chart shows you the right size of TT bike you need based on your height. Measure your height accurately and
check the manufacturer’s measurements too. You can also visit us in store to speak to an experienced member of staff.
| Rider Height | Suggested Triathlon Frame Size | ||
|---|---|---|---|
| Feet & Inches | Centimetres | Frame Size (cm) | Frame Size |
| 4'10" - 5'0" | 148cm - 152cm | 47cm - 48cm | XX-Small |
| 5'0" - 5'3" | 152cm - 160cm | 49cm - 50cm | X-Small |
| 5'3" - 5'6" | 160cm - 168cm | 51cm - 53cm | Small |
| 5'6" - 5'9" | 168cm - 175cm | 54cm - 55cm | Medium |
| 5'9" - 6'0" | 175cm - 183cm | 56cm - 58cm | Large |
| 6'0" - 6'3" | 183cm - 191cm | 58cm - 60cm | X-Large |
| 6'3" - 6'6" | 191cm - 198cm | 61cm - 63cm | XX-Large |
How are Time Trial Bikes Measured?
TT bikes are measured (in cm) from the centre of the bottom bracket to the top of the seat tube (centre of the top of seat tube). Some manufacturers will measure centre of the BB to the top of the top tube (centre to top) or centre of the BB to the centre of the top tube (centre to centre). So always check the manufacturer’s measurements or visit a store to speak to an experienced member of staff before you buy.
