Good catch on the bolt circle.
I was doing the 3.75 from memory, but you are correct.
Those original 2 piece Bobsy wheels confirm the dimension.
On Thu, Apr 8, 2021, 12:56 PM Richard Benson <rbenson@xxxxxxxxxxxxxxxx>
I need to jump in here to contradict others concerning the PCD of “SR6”
bolt pattern. I have the original wheels including the 2 piece bolt
together wheels and other 1 piece wheels for the SR5/6 Bobsy. These are not
4 on a 3.75 inch circle. They are instead 4 on a 92 mm circle which
converted to inches is 3.622 inches close to 3 5/8 inches. I obtained a
blueprint from Gil Wesson which I have attached which will help in any
slight modifications required to use them on any Bobsy version that uses
these rotors. The print verifies the bolt circle diameter at 92 mm.
*From:* bobsy_talk-bounce@xxxxxxxxxxxxx <bobsy_talk-bounce@xxxxxxxxxxxxx> *On
Behalf Of *Robert Alder
*Sent:* Thursday, April 08, 2021 9:33 AM
*To:* Bobsy Talk <bobsy_talk@xxxxxxxxxxxxx>
*Subject:* A Bobsy Talk Email: SR rotors.
Thanks to Tom for this amazing rotor discovery. Several years ago my SR-3
needed four new rotors. Ordering them from Coleman was the easiest thing
Than years later along came my rescue of the Bobsy FF and the discovery
that the entire front upright assembly (upright, rotor, caliper, and
tie-rod ends) was completely stock from a '68-'70 Open GT. And to my
amazement *www.opelgtsource.com <http://www.opelgtsource.com>* have
*everything* for an Opel GT and at very reasonable prices. Who knew!!!!
The proprietor, Gil Wesson, was very good to work with. 209-928-1110
Back to the story. Tom was in my shop one day, saw the Opel rotors sitting
there and observed that they sure looked like the SR rotors he was in need
of. I'd never even noticed their similarity. Tom borrowed one to compare
measurements and sure enough they worked. He ordered and mildly modified a
pair. BINGO $45-$50 SR replacement rotors.
All the credit goes to Tom's keen eye.