Author Topic: Trouble mounting 8.20x15 Coker Whitewalls on Sabre Wheels - 1957 Eldorado ?  (Read 374 times)

Offline Acmemopars

  • Posts: 40
  • CLC# 31194
  • Name: Michael Nelson
My recent acquisition (57 Eldorado Survivor) has tires from the 60's and were dry rotted & cracked so I recently bought a set of Coker Whitewalls (8.20xR15) to complete the look on my original Sabre Wheels.

The tires were shipped by Coker completely wrapped in very tight plastic and when we tried mounting it to the Sabre wheels, it was too narrow to catch a bead on the rims.  They tried blasting compressed air numerous times but it was still not enough to catch a bead lock.

Has anyone ever installed Coker 8.20x15s on Sabre wheels and seen this problem ?

Thanks in advance

Mike Nelson
Denison, Tx

Mike Nelson
Denison, Tx
CLC# 31194

57 Eldo Survivor
70 Sunroof Charger 1 of 1
56 F100

Offline Mike Josephic CLC #3877

  • Posts: 1551
    • CLC Member
      CLC Member #3877
Was this being done at a professional tire shop? 
A shop with no "old timers" may not know all the
tricks as to dealing with this problem.

I've mounted hundreds of tires when I worked for
Gulf Oil in the 60's and this is how we did it on the
old Coats machines (see video).  Newer wheels
and equipment, tire sizes, etc. are much different.

Sometimes, it takes more than "blasting air" to get
the bead to "catch".  You are using the right size for
the Sabres.  I have those on my '55 Eldo. 

Here's a clip from YouTube that explains the tricks nicely:

https://www.bing.com/videos/search?q=mounting+tire%2c+bead+won%27t+catch&view=detail&mid=B33C1FCEDA2CA47458F0B33C1FCEDA2CA47458F0&FORM=VIRE

Good luck & let us know how you make out!

Mike

« Last Edit: February 05, 2018, 10:05:57 PM by Mike Josephic CLC #3877 »
1955 Cadillac Eldorado
1973 Cadillac Eldorado
1995 Cadillac Seville
2004 Escalade
1997 GMC Suburban 4X4, 454 engine, 3/4 ton
custom built by Santa Fe in Evansville, IN
2011 Buick Lucerne CX
-------------------------------------
CLCMRC Museum Benefactor #38
Past: VP International Affiliates, Museum Board Director, President / Director Pittsburgh Region

Offline jeremy9146

  • Jeremy Weiss Jeremy9146@gmail.com
  • Posts: 135
    • CLC Member
      CLC Member #27831
Hey Mike

Iíve been through the same struggle many times before. Start by unwrapping all of the tires.  Then I use cut pieces of wood to hold the beads out to roughly where they will be when installed and inflated on the rim.  I usually let them sit with the wood in between the beads for a few days.  Remove the wood and install on the rim as normal.  This should make the beads seat easily.  Hope this helps.

Jeremy Weiss
Jeremy Weiss Bridgewater, NJ
Current collection:
1953 Eldorado x 2
1954 Eldorado
1958 Eldorado Biarritz
1959 Eldorado Seville
1959 Eldorado Biarritz
1960 Eldorado Seville

Offline Dan LeBlanc

  • Administrator
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    • CLC Member
      CLC Member #27657
  • Name: Dan LeBlanc
I know in the 61/62 shop manuals, tire installation is illustrated with an affair that almost looks like a ratchet strap around the tread area to swell out the bead area when pressure is applied.  The shop that mounted the bias ply tires on the 61 had the same issue with pancake tires.  Their solution was like Jeremy's - several pieces of wood letting them sit out in the sun. 
Dan LeBlanc - CLC # 27657
1970 DeVille Convertible
1977 Continental Town Car

Offline Acmemopars

  • Posts: 40
  • CLC# 31194
  • Name: Michael Nelson
Thanks Guys

I'm on it

Mike

Mike Nelson
Denison, Tx
CLC# 31194

57 Eldo Survivor
70 Sunroof Charger 1 of 1
56 F100

Offline Mike Josephic CLC #3877

  • Posts: 1551
    • CLC Member
      CLC Member #3877
Mike:

As Dan said, the "ratchet strap" device (shown in the film) is
what was used to help spread the bead area open.  It went
around the circumference of the tire.  A lubricant around the
bead helped it seat (we used RuGlyde).  A good tire shop
should know this.  See pic:

https://www.bing.com/images/search?view=detailV2&ccid=IR4SsCbG&id=C7FED4BB01B7772C1C9DE0C352DD0CC80EB7D0D4&thid=OIP.IR4SsCbGG3oNw1dKxbHePAHaI-&mediaurl=http%3a%2f%2fwww.lastgreatroadtrip.com%2fwp-content%2fuploads%2f2009%2f06%2fratchet-strap-to-set-tire-bead.jpg&exph=1110&expw=916&q=ratchet+strap+to+seat+tire+bead&simid=608009582704067507&selectedIndex=0&ajaxhist=0

Unwrapping them and propping them open with a few pieces
of wood is a good idea.  I don't know where you live but even
out in the sun here, it's well below freezing.  If you have a
warm basement that would help. 

Mike
1955 Cadillac Eldorado
1973 Cadillac Eldorado
1995 Cadillac Seville
2004 Escalade
1997 GMC Suburban 4X4, 454 engine, 3/4 ton
custom built by Santa Fe in Evansville, IN
2011 Buick Lucerne CX
-------------------------------------
CLCMRC Museum Benefactor #38
Past: VP International Affiliates, Museum Board Director, President / Director Pittsburgh Region

Offline Dave Shepherd

  • Posts: 1977
We always have trouble mounting their tightly wrapped tires, pita, we use the compressed air tank that is used for truck tires, doesn't always work. Spreading the bead in a heated area seems to work.  We have repeatedly complained about this to Coker , some of the tires have been wrapped for a year.

Offline David King (kz78hy)

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  • Check out the Eldorado Brougham Chapter
    • CLC Member
      CLC Member #22014
  • Name: David King
After my first problem with this, I cut the wrapping off the tires the day before I took them to Discount Tire to install.  They were able to do it.

David
David King
CLC 22014  (life)
1958 Eldorado Brougham 615
1959 Eldorado Brougham 56
1960 Eldorado Brougham 83
1998 Deville d'Elegance
2003 Deville gifted to daughter
1964 Studebaker Commander
1966 Pontiac GTO convertible
2012 Volt
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Director and Founder, Eldorado Brougham Chapter of the CLC
Past President, Motor City Region of the CLC

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Offline Acmemopars

  • Posts: 40
  • CLC# 31194
  • Name: Michael Nelson
Thank YOu

Mike Nelson
Denison, Tx
CLC# 31194

57 Eldo Survivor
70 Sunroof Charger 1 of 1
56 F100

Offline cadillacmike68

  • Posts: 1363
  • Still finishing up this 1968
    • CLC Member
      CLC Member #15823
  • Name: M Santos
I know in the 61/62 shop manuals, tire installation is illustrated with an affair that almost looks like a ratchet strap around the tread area to swell out the bead area when pressure is applied.  The shop that mounted the bias ply tires on the 61 had the same issue with pancake tires.  Their solution was like Jeremy's - several pieces of wood letting them sit out in the sun.


That's what I remember. I think it was called a bead expander.
Regards,
"Cadillac" Mike
Current:
1968 DeVille Convertible
1996 Fleetwood Brougham
2009 STS NorthStar Platinum ed RWD
2011 CTS PRemiun ed Sedan RWD
Past:
2008 CTS Premium ed Sedan AWD
2005 CTS Hi-Feature Sedan RWD
2000 ElDorado ESC Hard Boot Convertible
1995 Fleetwood Brougham
1973 Sedan DeVille
1970 Fleetwood Brougham
1969 DeVille Convertible

 

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