Tall riders on small underbones get cramped knees and a weight distribution like a giraffe on a stool. The fix is in the spec sheet - seat height, wheelbase and frame length - and Honda and Yamaha publish all three (retrieved 23 September 2026).
The verified size ranking
| Model | Seat height | Wheelbase | Length | Kerb weight |
|---|---|---|---|---|
| Honda CT125 | 800 mm | 1258 mm | 1961 mm | 117 kg |
| Honda Winner R | 795 mm | 1277 mm | 2013 mm | 124 kg |
| Honda CBR150R | 788 mm | 1312 mm | 1983 mm | 139 kg |
| Honda Super Cub C125 | 780 mm | 1243 mm | 1910 mm | 109 kg |
| Honda Wave Alpha 110 | 770 mm | 1224 mm | 1913 mm | 96 kg |
| Honda Blade | 769 mm | 1217 mm | 1920 mm | 98-99 kg |
| Honda Wave RSX | 760 mm | 1227 mm | 1922 mm | 98 kg |
| Honda Future 125 FI | 756 mm | 1258 mm | 1931 mm | 104 kg |
Yamaha does not publish seat heights for the Sirius RC or Exciter 155 VVA on the retrieved pages - those models are listed here without seat figures rather than guessed.
Reading the numbers
Seat height is only part of the story: the CT125’s 800 mm plus 165 mm ground clearance make it the roomiest sitting position in the verified range. The CBR150R has the longest wheelbase (1312 mm) plus a full-size sport riding position - the best fit for tall riders who want a manual bike. The Winner R adds a 795 mm seat and the second-longest wheelbase with sport underbone ergonomics.
Among the semi-automatics, the Super Cub C125 (780 mm) is the tallest, with the Future 125 FI offering the longest practical frame at 1931 mm despite its low 756 mm seat - the low seat plus long 1258 mm wheelbase actually suits long legs that fold, not stretch.
The rental reality check
Most rental fleets run the short-seat commuters. If you are tall, ask before booking: contact us to confirm current availability of taller-seat models like a Cub or a manual bike. Honda Wave-class and Yamaha Sirius are our price-published daily classes at 150,000 VND. Insurance is not included in rentals - customers arrange their own.