I remember reading that Rupp started producing the A-Bone with the narrow steering hoop in 1968.
(That was the same year I started 1st grade... so I'm not working from first-hand knowledge on this one.)
I think that the Brand-X had it much earlier (Gary Wlodarsky would know, since he has one).
Also, the version made for Sears had the narrow hoop in 1963 (thanks Rob V and Bob K):
http://rearenginekarts.com/phpbb3/viewtopic.php?f=1&t=3776&start=0
Last edited on Fri Sep 29th, 2017 09:55 pm by Doug Tenney
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