Other options Cane Creek Thudbuster ST G4 from £127. VerdictĮxceptional and unobtrusive ride comfort with restrained styling and superb finishing. The Redshift post is a pleasing and effective, if weighty, addition to any cycle. In a neat piece of detailing, the mechanism is shielded from spray by a magnet retained plate on the back of the upper linkage block. The dual-bolt cradle is micro-adjustable and fairly easy to use. Steel springs aren’t light, and the 350mm-long post weighs 360g with the main spring fitted. Diameter is 27.2mm it can be used in larger seat tubes with a suitable shim. The saddle bottomed out a couple of times over bigger bumps more spring compression might be useful off-road. The system feels well-damped and there’s no noteworthy ‘bounce’ at any cadence. The weight chart runs from 50-110kg, with riders over 90kg advised to use both springs, the smaller sitting inside the main spring when fitted. The clear and concise instructions suggest positioning the saddle 5mm further forward and 6mm higher than with a rigid post to account for the initial sag when sitting. Along with the suggested spring force setting, made by turning a threaded plug in the bottom of the post to compress the internal spring, this proved accurate to the point where no further adjustment was needed. The Redshift post uses both to impressive effect. Travel is a stated 35mm, through an arc moving backwards and downwards. This feels natural and, perhaps surprisingly, there’s no real sensation of loss of saddle height when pedalling. While heavier than an elastomer, a coil spring has a couple of advantages: it provides a linear compression rate and more travel for the same size linkage. Parallelogram posts have generally employed an elastomer Redshift’s Shockstop uses one or two coil springs, depending on rider weight. This leaves the deformable parallelogram, which can be orientated to let the saddle move pretty much as desired and with plenty of travel. Redshift Sports is offering the ShockStop Pro in the same range of lengths 80-120 mm, in 10-mm increments, all in +/-6° angles and it’s meant to pair with 1 1/8 in steerer tubes and 31. The post is only offered in a 27. A telescoping post, which potentially offers as much travel as anyone might need, tends to suffer from ‘stiction’ and constrains the saddle to move forwards as it drops. The 350mm-long ShockStop offers 35mm of total travel through the linkage travel. Of the three most obvious means of allowing saddle displacement to absorb bump shocks, simple flexibility is the lightest but offers limited movement. But they dropped out of the mainstream, due to a performance that was often less than stellar. Suspension seatposts never really went away after their 1990s’ heyday. Redshift Shockstop Suspension Seatpost £229.00
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