https://matteocampagna.com/en/registry/equipment/lighter-riser-stiffness Changes to this claim in Matteo Campagna's evidence registry: its status, its year-by-year history, revisions of the page. en-gb https://matteocampagna.com/en/registry/equipment/lighter-riser-stiffnessThe only test of a lightened riser dates from 2004, comes from a single German group and, where it matters, is a calculation: a 25-inch riser designed with an evolutionary algorithm weighs, once built, 871 grams against the 1,114 of the Hoyt Radian used by the German national team, 22 per cent less, and in the structural analysis, with 200 newtons of draw weight, it deflects at most 1.94 millimetres against 1.85. That would be almost the same stiffness, with about 5 per cent more deflection, and the margin was there because the stresses in the aluminium reach 160 newtons per square millimetre against a yield point of around 400. The weight of the built riser is measured, though, and the deflection is not: nobody loaded the real riser, and the stiffness comes only from the computer model. Two further limits remain: a lighter riser usually costs stiffness, since in the two computing runs the models weighed on average 864 and 880 grams but deflected on average 2.74 and 2.63 millimetres, and all we know about how that riser shoots is the opinion of three national team archers, two of them after nine arrows, while the authors themselves write that no study has ever shown that a stiffer riser makes anyone shoot better. In 2016 a second calculation, on a Hoyt Matrix riser, finds the same maximum displacement of 1.85 millimetres at 200 newtons, but it concerns a commercial riser rather than a lightened one, and there too the real riser was never put under load.claim:riser-leggero-rigidita:revision:2026-08-13:2Thu, 13 Aug 2026 08:00:00 GMT https://matteocampagna.com/en/registry/equipment/lighter-riser-stiffnessclaim:riser-leggero-rigidita:new_claim:2026-07-29:trasferitoWed, 29 Jul 2026 08:00:00 GMT