Shock Absorber Type 643 QRR - IDM Preload Adjuster:Mechanical (X-PA) – 2× Harley-Davidson top-out springs

– 2× Harley-Davidson top-out springs

Thanks to an additional gas spring that stiffens with load

The negative spring deflections are slightly too low in the stock configuration

WESA Dynamic for BMW M 1000 R

These have been replaced by progressive fork springs

Shock Absorber Type 643 QRR - IDM Preload Adjuster:Mechanical (X-PA) – 2× Harley-Davidson top-out springsIDM race replica shock with finned reservoir. Specially developed for IDM Superbike competition, this shock uses an integrated finned expansion reservoir for superior oil cooling and a constant damping curve. Our racing teams development work feeds directly into the rider specific setup a true race replica shock. Features: X PA spring preload adjuster: stepless 15 mm range Ride height adjustment: shock length 5 mm Adjustments: high low speed