The “modern” Harley Springer front end is essentially a development of the first leading-link design but with progressive compression and rebound springs. The British Castle fork fitted to the Brough Superior closely followed the Harley design, but added large rotary friction dampers. The leading-link fork fitted to Harley-Davidsons carried the front wheel axle ahead of the spring leg, which slid against a coil spring carried in the main fork. Vincent’s own Girdraulic fork used forged alloy blades for extra strength instead of the welded tube construction of the Brampton, and added hydraulic damping. The Brampton fork, later fitted to Vincents, was similar in concept to the Webb. Webb ever made any money from his invention is unlikely, as just about every British motorcycle manufacturer built its own fork following the basic Webb design. Advantages over the Druid included the option of a rotary friction damper and tapered coil springs for progressive compression. Most popular in terms of usage on pre-WWII British motorcycles was the Webb fork, which again used a parallelogram linkage to allow for suspension travel, usually controlled by a large central spring.
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