When designing a custom chopper, one of the earliest design decisions is to determine if it will use a Rigid frame (no rear suspension) or a Softail frame (with hidden rear suspension). This choice not only dictates the visual line of the frame at the rear but also has a significant impact on riding comfort.
Rigid frames represent the classic chopper design. In a rigid chassis, the rear axle is mounted directly to the steel frame without shock absorbers or springs. The advantage is a clean, minimalist visual line flowing smoothly from the handlebars to the rear wheel. However, the consequence is the loss of rear bump dampening; the rider feels every road vibration directly. To counter this, builders install springs under the solo seat and use lower tire pressure as minimal dampening.
On the other hand, Softail frames offer a smart middle ground. Softails are designed to mimic the clean look of rigid frames while incorporating a rear swingarm connected to shock absorbers hidden beneath the frame. This provides much better comfort for long-distance riding, absorbing harsh road impacts while maintaining the classic chopper silhouette. Softails are highly recommended for riders who prioritize comfort without wanting to sacrifice custom aesthetics.