Setting front toe on a trike

Recumbents and all feet forward machines

Setting front toe on a trike

Postby JulianEdgar » Sat Mar 06, 2010 7:30 pm

If you have a trike with negative front camber, or there is toe or camber change with suspension movement, setting the toe by the traditional measuring method can be very difficult to get right - where 'right' = minimum rolling resistance at typical ride height.

But - and maybe everyone already knows about this but I didn't - there's a very easy way to do it.

Connect one tie rod and leave the other off at one end (eg the outer end). Ride along slowly, going straight ahead. (That is, steer straight ahead with the one connected wheel.) The disconnected wheel will track truly. Stop without further changing the steering.

Adjust the tie rod length so that the disconnected tie rod rose-joint matches the position of the wheel. On my trike, with a vertical threaded spud, I adjust the free tie rod length so that the rose-joint drops straight over the spud.

My minimum rolling resistance actually looks to have toe-out (I run neg camber).
JulianEdgar
 
Posts: 27
Joined: Sat Mar 21, 2009 7:35 am

by BNA » Mon Mar 08, 2010 6:44 am

BNA
 

Re: Setting front toe on a trike

Postby JulianEdgar » Mon Mar 08, 2010 6:44 am

I should also add that when I first built the trike I set-up the Ackerman compensation in much the same way - steering one wheel at tight lock and then letting the other find its natural angle, then organising the steering linkage to allow this to always occur. It was very useful in fine tuning the angles.
JulianEdgar
 
Posts: 27
Joined: Sat Mar 21, 2009 7:35 am


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