The Radical's design is split-pivot linkage-driven and employs an idler pulley, completing the trend with a rearward axle path for better energy retention.
Sunn's R&D manager, Serge Lopez, explained the similarities and differences in the new Radical's design compared to previous models and other brands.
After decades in obscurity, Sunn has revived the Radical for 2025, reintroducing iconic elements while making adjustments for modern enduro racing.
While the suspension design shows some parallels, Lopez clarifies that the Radical's platform is distinct from those used in other noted bike brands.
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