I first spotted the Toxy ZR online in about 2005 and commissioned a friend to make me  a similar machine but it never really handled satisfactorily. It was decidedly scary at speed.

I cut off the boom and make it into a moving-bottom-bracket lowracer using a cut-down Cruzbike kit to fit the 406 wheels. I made the mistake of altering the steering head angle in line with Tom Traylor’s recommendations that he published many years ago.

The handling was still bad but improved greatly when I fitted a much longer rear damper, which had the effect of bringing the head angle closer to the usual ~70 degrees.

I got it to the point of being very usable and then decided to tweek the geometry again.

In its final form with Cruzbike kit fitted.

toxic

Instead of leaving well alone, I tried recutting the frame to steepen the head angle so I could use the original short damper unit. The result was a disaster so I cut the head tube off and am in the process of making a new frame based on ideas from the extinct Z-Bone that George Reynolds used to make.

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