HappyRun G300 Pro vs Altis Sigma: which is bigger?
The Altis Sigma is the bigger bike. Its wheelbase is 3.4 in (86 mm) longer (50.6 in (1,285 mm) vs 47.2 in (1,199 mm)), its seat sits 2.1 in (53 mm) higher, and it weighs 48 lb (22 kg) more.
With a 31 in (787 mm) seat, riders around 5'3" and up can get the balls of both feet down once suspension sag is counted, and riders around 5'8" and up can flat-foot it. On the Altis Sigma, with a 33.1 in (840 mm) seat, riders around 5'8" and up can get the balls of both feet down once suspension sag is counted, and riders around 6'1" and up can flat-foot it.
Silhouettes are traced from manufacturer side-profile photos and scaled so the wheel-to-wheel distance matches the published wheelbase, so small parts like mirrors and fenders may be off by a few percent.
Questions
Is the HappyRun G300 Pro bigger than the Altis Sigma?
No. The Altis Sigma has the longer wheelbase, 50.6 in (1,285 mm) vs 47.2 in (1,199 mm), and is 78 in (1,980 mm) long overall vs 68.5 in (1,740 mm) for the HappyRun G300 Pro.
Which has the lower seat height, the HappyRun G300 Pro or the Altis Sigma?
The HappyRun G300 Pro, at 31 in (787 mm) vs 33.1 in (840 mm) for the Altis Sigma, a 2.1 in (53 mm) difference.
How tall do you need to be for the HappyRun G300 Pro vs the Altis Sigma?
Roughly: the HappyRun G300 Pro suits riders from about 5'3" (balls of feet down) and the Altis Sigma from about 5'8". Shorter riders manage both with lowering links or a slimmer seat. Enter your height above to see yourself next to both.
Which is lighter, the HappyRun G300 Pro or the Altis Sigma?
The HappyRun G300 Pro: 137 lb (62 kg) vs 185 lb (84 kg) for the Altis Sigma. Manufacturers don't all weigh the same way, so treat small gaps as a wash.
Which is faster?
The Altis Sigma has the higher claimed top speed: 75 mph vs 50 mph.