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“All in all: The rear SIP PERFORMANCE Silencer with the ‘-20%’ Spring is the real deal!”

–Mike Betz, GSF, ESC Racing Team, 2010



“Tested on an ESC K3 scooter with a complete SIP suspension setup. The shock absorber settings were NOT changed between the two spring tests. The spring preload was set all the way to soft. The rebound adjustment was almost centered by clicks. The riding experience was significantly more comfortable and provided noticeably more stability and confidence on fast, undulating sections. Where the hard Silencer had previously introduced a kind of instability into the suspension, the bike rolled much more smoothly over bumps with the soft Spring. No bottoming-out effect was observed on the rear wheel during hard braking from high speeds approaching chicanes. Definitely a worthwhile purchase.”

–Steffen Biedermann, 07/2010