Both the 2018 Harley Davidson Iron 883 and the 2017 Triumph T100 are great motorcycles, but there are a few factors to consider when choosing the right one for you based on your height and weight.
Ergonomics and Fit: As someone who is 6' tall and weighs 315 lbs, you might find the Harley Davidson Iron 883 to be a bit cramped in terms of ergonomics. The Iron 883 has a lower seat height and a more aggressive riding position, which could be less comfortable for a taller and heavier rider. On the other hand, the Triumph T100 offers a more upright riding position and a longer seat, which may be more accommodating for your size.
Power and Performance: Given your weight, you may want to consider the power and performance of the motorcycle. The Iron 883 is equipped with an 883cc V-twin engine, whereas the Triumph T100 features a larger 900cc parallel-twin engine. The T100's engine provides more torque and power, which could be advantageous for a rider of your size, especially if you plan on riding on highways or carrying a passenger frequently.
Style and Preference: Both the Iron 883 and the T100 have distinct styles, so it's important to choose the one that aligns with your personal preferences. The Iron 883 has a classic Harley Davidson cruiser look with a darker, more aggressive aesthetic, while the T100 has a retro-inspired design that harkens back to the classic Triumphs of the past. Consider which style resonates with you the most.
Ultimately, it's recommended to test ride both motorcycles if possible to get a better feel for their handling, comfort, and overall fit. This will help you determine which bike suits you better and provides a more enjoyable riding experience. Additionally, consult with local dealers or experienced riders to gather more insights and opinions specific to your riding conditions and preferences.