[concours] Tires for a 61 E-Type

I know this subject has been discussed previously but I am interested in
the definitive answer as to whether there will be a deduction for radials
on a 61-E-Type. I have a chance to buy a new set of new wheels (with ss
spokes) and red line radial tires from someone who has now decided to equip
his car for performance with wide wheels along with many other mods.

The judges guide says “Size must be consistent with the original profile.
Type must be consistent with availability of the vintage of the Jaguar.”
My restorer says that radials were available in 1961 although I note that
on a May 24, 1998 posting, Dick Cavicke says “The rules still only allow
radials on E-Types manufactured after 5/63”. I don’t see this specifically
in the two pages of rules that I have relative to tires unless someone has
found that radials were not available until after 5/63 contrary to what my
restorer says.

Can someone give me the current ruling on this?

Bob Reid

61 E-Type OTS
69 E-Type FHC
73 E-Type OTS
84 XJ6

Bob,

The JCNA Rule Book Appendix B, Page 3 under the 1961-67 E-type (Ser 1)
3.8L, 4.2L listing shows the 6.40 x 15 and the 185HR15 sizes. A note
beside the 185HR15 listing states “SP-41, (Optional after 5/63) (3.8
shouild not be fitted with 6.70 bias or 185 x 15 Dunlop SP41 radial)”

I am only quoting from the book. If anyone can document exceptions to
the foregoing then that information should be submitted to JCNA either
through the Annual General Meeting or the Authenticity Committee.

Regards, Dick Cavicke

I know this subject has been discussed previously but I am interested in
the definitive answer as to whether there will be a deduction for radials
on a 61-E-Type. I have a chance to buy a new set of new wheels (with ss
spokes) and red line radial tires from someone who has now decided to equip
his car for performance with wide wheels along with many other mods.

The judges guide says “Size must be consistent with the original profile.
Type must be consistent with availability of the vintage of the Jaguar.”
My restorer says that radials were available in 1961 although I note that
on a May 24, 1998 posting, Dick Cavicke says “The rules still only allow
radials on E-Types manufactured after 5/63”. I don’t see this specifically
in the two pages of rules that I have relative to tires unless someone has
found that radials were not available until after 5/63 contrary to what my
restorer says.

Can someone give me the current ruling on this?

Bob, et. al.,

I did some poking around the Michelin web site and found some possibly
useful information. After radials were invented in 1946, widespread
use came several years later with production of the Michelin X series
in 1949. Take a look at this web page for reference:
http://www.michelin.com/us/eng/groupe/p1138.htm

In 1951, Michelin states that “In the Le Mans 24 Hour race a Lancia
B20 using X Tires and a Renault 4 on conventional Michelin tires come
in first in their categories.”

The following page;
http://www.michelin.com/us/eng/groupe/p1139.htm
indicates that radials were pretty common in 1955, stating, “… a
majority of European auto manufacturers had gone to them.”, although
asymmetrical sprint and rally (the XAS series) tires weren’t in
Michelin’s product line for racing and high speed (116mph) use until
1965, which isn’t until after your stated 5/63 date.

It seems that radials, although not race bred radials, should be
considered current with the period of your Jag, and therefore,
acceptable. They were clearly available and used in racing circles;
however, the clinker may be whether or not Jaguar had opted to use
them in production, due to their limited high speed capabilities at
the time, or whether they were just an after-market option.

Is there anything in the brochures covering optional tires? Is there
a deduction for optional rally equipment available from dealers?

I hope this helps, and doesn’t just muddy the waters. There should be
more historical data available on some of the other tire
manufacturers’ pages via the web search engines. However, the
definitive answer may lie in Jag manufacturing/sales policies of the
period.

I attended my first Jaguar Concours d’ Elegance in Celebration,
Florida [US], near Disney World last weekend. I haven’t come down
from the joy it yet. Simply marvelous machines and delightful owners.
It was sponsored by the Jaguar Club of Florida (JCNA) and was a JCNA
sponsored XK 50 year event. Very well done.

Inspired to get on with the S and 420…

Cheers,
Dan Fitch, Merritt Island, Florida [US]
95’ X300
82’ XJ6-III
67’ 3.4 S RHD
67’ 420 RHDOn Wed, 16 Sep 1998 12:54:48 -0500, Bob Reid wrote:

Dick,
Just for your reference I believe I inherited that information when I
put the rule book together. I do recall a change to one of the tire
statements but not sure just which one. I do know that change I received
from Jerry Parkhill. You might ask him if it is the information you are
looking for.

I can tell you that in the 3.8S-420 book (whose author I don’t recall
because I loaned my book out) it states june 1964 Dunlop SP41 radial
tyres replaced RS5 cross-plies. RS5s remained on tyres with whitewalls.

Steve Kennedy

PS
I have just put a copy of my Jaguar book in the mail to you for your
review. I would appreciate your feedback on it. Feel free to write all
over it. Note any corrections or items you are not sure are correct. No
need to return the whole book, make photocopes of your edits and return
them or fax them 303-456-5019. Do keep in touch through the net letting
me know your general thoughts.

I will also send a copy to John Elmgreen in Australia but thats $15.00
so it will have to wait til payday to get mailed.

Steve