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Hillclimb Springer Forks for 45”/750 cc Models with Custom Disc Brakes and 19 mm Axle

Hillclimb Springer fork »Inline« by Samwel Supplies

Item №
16-869

In the late 1920’s and early 1930’s, the Race Department experimented with a "trailing link" fork design on factory hillclimb race bikes. This distinctive design was the inspiration behind these reproduction Hillclimb Springer forks.

  • The versions for Big Twins feature a fork stem that works with the included centering collar for 1936-up ball bearings. Moreover the stem also features two Ø1” bearing seats for the use of 1949-up tapered roller bearings without any modifications.
  • The forks for 45”/750 cc models have a 7/8” fork stem and fit the stock neck bearings.
  • The leg tops accept the 36-up Springer inline handlebars.
  • Wheel trail equates that of standard Classic Springer forks.

The selection includes forks for stock or similar Springer drum brakes and forks for Custom disc brake systems. Length is measured from axle center line to seat of lower steering head bearing.

Although these Custom forks are intended for 1936-1957 rigid frame Big Twins they can be mounted with later frames, too, provided you have/install matching frame head beariings. The builder has to consider rake, trail, overall chassis geometry, brake function, etc.

  • fits 45 cui / 750 cc
  • for custom disc brakes & 19 mm axles
  • steel, black, powder-coated, with chromed springs, internal thread of neck post: 5/8”-14 UNS
  • length: 48.5 cm
  • rake: 0 °
  • Europe
  • gross weight: 15 kg

Internal Threads on the Upper End of the Legs

For custom riser installation the fork legs have M20x1.5 internal threads at the upper end and accept riser adapter studs or plugs which are available separately; an extra added by the manufacturer which saves you a lot of work and axle grease.

Inline vs. Offset

Classic Springer Forks are produced for different frame rakes.

  • In the beginning, both the main tubes and the steering stem were in the same plane. This is called "inline". The rake is 0°. Of this type were all 45” Springer forks 1936-1957 and all Big Twin forks 1936-1945.
  • From 1946 onwards the Big Twins had the neck angle increased to 30°. To maintain fork inclination and ground clearance, the steering stem was tilted to the rear by 3°. We call these forks Offset -3°, they were stock on 1946-1948 Big Twins.
  • When building a bike with ≥+8” extra long forks you don’t want the steering neck so high and inclined that the bike is difficult to steer. Therefore such forks are manufactured with a positive rake, i.e. the steering stem is inclined to the front by 3°. We call these forks Offset +3°.

The sketch shows the placement of the lateral tubes and steering stem seen from the drivers place. Now it is clear, too, why there have to be three different types of top trees or handlebars for Classich Springer forks.

Price incl. VAT*
1,990.00 €
* The price includes 317.73 € German VAT (19% or reduced rate of 7% for Books).
In stock. Ready for immediate delivery from our Würzburg, Germany warehouse
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