No size scaled rear centre/ chain stay length. 435 mm is okay for a 29" hard tail (barely) but 435 mm before sag (which effectively shortens the rear centre) is too short. Centred balance beats a short rear centre for trail stability and manoeuvrability any and every day. The biggest reason I choose my Sight over my Optic on any of those 'not sure which bike to take' days is the extra 5 mm of rear centre and the steeper STA which helps me stay centred without effort and creates a more natural effective reach.
Dec. 17, 2022, 8:46 a.m. - AndrewR
No size scaled rear centre/ chain stay length. 435 mm is okay for a 29" hard tail (barely) but 435 mm before sag (which effectively shortens the rear centre) is too short. Centred balance beats a short rear centre for trail stability and manoeuvrability any and every day. The biggest reason I choose my Sight over my Optic on any of those 'not sure which bike to take' days is the extra 5 mm of rear centre and the steeper STA which helps me stay centred without effort and creates a more natural effective reach.