Fixed Axle Suspension

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The parts of the trike conversion called “suspension” suspend the driver and passenger from the ground.   This keeps your body and spine from feeling every single bump and hole in the road.  There are two primary types of suspension in practice on trike conversions:  independent suspension and fixed axle suspension.

Fixed Axle Suspension
Fixed Axle Suspension by Mystery Designs

Fixed Axle Suspension is an Economical Option

A fixed axle suspension converts most belt or chain driven motorcycles into a trike.   With a fixed axle the left and right side are tied together.  The conversion takes only a few hours by a competent mechanic.    Many of these also have a  limited-slip differential (LSD). LSD is a type of differential gear arrangement that allows for some difference in angular velocity of the output shafts.  This means that the wheels both stay powered when you need them to.

In an automobile, such limited-slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity

  • Mystery Designs makes several different Fixed Axle systems.  They make a 41″ model.  This provides a stable ride for most applications.  The 33″ fixed axle model is cheaper.  However, to maintain stability you need to use wider rear tires.  This system has the same center section as their independent suspension so it can be retrofitted later.
  • Lehman Trikes make a fixed axle suspension also.  This is a differential rear-end that has internal solid axles.  This is a very sturdy axle.  Their kit minimizes sway or roll to outside cornering. This gives it good stability and easy steering at highway speeds.
  • DNA Axles are another solid option.  Pun is intended. These axles have been in production for over 12 years, and are an economical solid axle option.   These are  Limited Slip Differential Axles.