SAAC Forum

The Cars => 1966 Shelby GT350/GT350H => Topic started by: NC TRACKRAT on April 03, 2019, 01:25:21 PM

Title: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: NC TRACKRAT on April 03, 2019, 01:25:21 PM
With the advent of improved equipment for dismounting old tires and mounting new ones, risk of damage to the wheels has lessened but I'm still paranoid when it comes to minimizing any possibility of damage during these operations and during balancing.  Anyone with experience in this regard? Any special precautions to take with the 10-spokes?  TIA!
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: EdwardGT350 on April 03, 2019, 01:34:39 PM
i heard it may take 100 pounds of pres to get the bead to seat.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: KR500 on April 03, 2019, 03:02:47 PM
With the advent of improved equipment for dismounting old tires and mounting new ones, risk of damage to the wheels has lessened but I'm still paranoid when it comes to minimizing any possibility of damage during these operations and during balancing.  Anyone with experience in this regard? Any special precautions to take with the 10-spokes?  TIA!
As long as the machine is set up properly and the operator is careful they are no different than any other alloy wheel. Original 10 spoke tend to be not so true though so depending on the tire machine a little extra clearance maybe required in the setup. No they do not take 100psi to seat or any where close to that. 20 to 35PSI would be normal to seat the tire on the wheel. Note; even being extremely careful sometimes the clear coat can flake off in spots on the outer edge of the wheel, like any other alloy wheel.
Rodney
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: Bob Gaines on April 03, 2019, 03:39:36 PM
With the advent of improved equipment for dismounting old tires and mounting new ones, risk of damage to the wheels has lessened but I'm still paranoid when it comes to minimizing any possibility of damage during these operations and during balancing.  Anyone with experience in this regard? Any special precautions to take with the 10-spokes?  TIA!
As long as the machine is set up properly and the operator is careful they are no different than any other alloy wheel. Original 10 spoke tend to be not so true though so depending on the tire machine a little extra clearance maybe required in the setup. No they do not take 100psi to seat or any where close to that. 20 to 35PSI would be normal to seat the tire on the wheel. Note; even being extremely careful sometimes the clear coat can flake off in spots on the outer edge of the wheel, like any other alloy wheel.
Rodney
Rodney is most likely referring to 67 tenspokes . EdwardGT350 is referring to 66 tenspokes is my guess. There is more difficulty mounting the  66 style tenspoke unfortunately.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: Don Johnston on April 03, 2019, 04:26:23 PM
My problem with the 66 10 spokes is air pressure loss.  With radials, some do not always seat well on the outside rim bead.  Using a better installation soap seems to help.   8)
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: Bob Gaines on April 03, 2019, 05:45:50 PM
My problem with the 66 10 spokes is air pressure loss.  With radials, some do not always seat well on the outside rim bead.  Using a better installation soap seems to help.   8)
The aluminum can be porous also. I know some that solved the problem by carefully cleaning the inside rim and coating with a rubber paint like product. the good news is that here are more products out like that now then back then.  I knew of several over the years and they all seemed to be 66 wheels. No doubt the same thing can happen with the 67 wheels but just didn't hear of that same problem with those . Maybe others have.  For them that solved the problem on their 66 wheels.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: acman63 on April 03, 2019, 06:15:43 PM
With the advent of improved equipment for dismounting old tires and mounting new ones, risk of damage to the wheels has lessened but I'm still paranoid when it comes to minimizing any possibility of damage during these operations and during balancing.  Anyone with experience in this regard? Any special precautions to take with the 10-spokes?  TIA!
As long as the machine is set up properly and the operator is careful they are no different than any other alloy wheel. Original 10 spoke tend to be not so true though so depending on the tire machine a little extra clearance maybe required in the setup. No they do not take 100psi to seat or any where close to that. 20 to 35PSI would be normal to seat the tire on the wheel. Note; even being extremely careful sometimes the clear coat can flake off in spots on the outer edge of the wheel, like any other alloy wheel.
Rodney

15 inch ten spokes are easy.   14 Inch  66 10 spokes are a bitch to mount radials
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: KR500 on April 03, 2019, 06:23:09 PM
With the advent of improved equipment for dismounting old tires and mounting new ones, risk of damage to the wheels has lessened but I'm still paranoid when it comes to minimizing any possibility of damage during these operations and during balancing.  Anyone with experience in this regard? Any special precautions to take with the 10-spokes?  TIA!
As long as the machine is set up properly and the operator is careful they are no different than any other alloy wheel. Original 10 spoke tend to be not so true though so depending on the tire machine a little extra clearance maybe required in the setup. No they do not take 100psi to seat or any where close to that. 20 to 35PSI would be normal to seat the tire on the wheel. Note; even being extremely careful sometimes the clear coat can flake off in spots on the outer edge of the wheel, like any other alloy wheel.
Rodney

15 inch ten spokes are easy.   14 Inch  66 10 spokes are a bitch to mount radials
Yes 67 15" 10 spokes. Sorry I missed the 1966 header topic.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: acman63 on April 03, 2019, 09:26:00 PM
The reason 66s are a problem is the bead on radials is a different angle than the bias ply tires and the long side of an original wheel is made for a bias tire bead.  When i go to the goodyear store they give me that look when i have an original wheel to mount
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: Don Johnston on April 03, 2019, 09:58:43 PM
Did any later editions of the 66 10 spoke change the rim edge to successfully accomodate radials? 8)
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: s2ms on April 03, 2019, 10:11:42 PM
Guess I've been lucky. I've had the local Goodyear dealer dismount/mount new radials on original 66 10-spokes twice and never had an issue.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: acman63 on April 04, 2019, 09:58:18 AM
Did any later editions of the 66 10 spoke change the rim edge to successfully accomodate radials? 8)


Yes,  im going to send side by side compariosn pictures.  The  2nd generation wheel which is the best version compared to the originals in looks  has the upgraded long bead
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: sfm5s081 on April 05, 2019, 01:04:00 PM
I too had problems mounting my new good year 14" tires on my 10-spokes. 2 of the wheels kept going flat. I over inflated them and the problem was fixed. About 1 day later, I reduced to tire pressure to the correct psi and I'm good to go
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: acman63 on April 09, 2019, 11:39:09 PM
two pics here.    first version wheel is a straight 90 degree long side bead with no safety bead.   Other wheel is 2nd version and the long side bead has an angle to it along with the safety bead.  this wheel will accept a radial much easier because the radial beads are at an angle whereas a bias tire  from the 60s has a 90 degree bead
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: Bob Gaines on April 09, 2019, 11:44:14 PM
Thanks for the pictures. Second version began being made when?
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: roddster on April 10, 2019, 10:35:28 AM
  Former replys duly noted.
 
   Start by talking to the shop manager that you have classic, hard to replace wheels and that you would like his best tire machine technician on this job.  Then, before he begins, tip that person $20.00 to ensure a good job.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: Bob Gaines on April 10, 2019, 11:19:58 AM
  Former replys duly noted.
 
   Start by talking to the shop manager that you have classic, hard to replace wheels and that you would like his best tire machine technician on this job.  Then, before he begins, tip that person $20.00 to ensure a good job.
+1 .Very prudent advice.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: sfm5s081 on April 10, 2019, 02:59:35 PM
I ran my tires to 45psi, let it sit over night then redced them to 30psi. Problem solved
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: acman63 on April 10, 2019, 04:14:59 PM
Thanks for the pictures. Second version began being made when?

 not exactly sure but thinking in the late 60s early 70s. Logic would tell you that they were making them as the radial tires were becoming the norm.   They changed the center hub configuration so you can really tell the difference exterior in the late 80s.   The also machined them  rather than polish the spokes almost to the point that you could cut your finger on a spoke. Shelby Wheel company made all of the service wheels that I know of.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: NC TRACKRAT on April 10, 2019, 05:47:37 PM
Dismounted the old tires and mounted new today with 100% success.  Modern equipment and careful operator are paramount.  We spent about 2 hours doing a set of five. Seating the beads on 3 out of 5 required upwards of 60 psi and some "coaxing". Rotation on road force balancing machine helped the process.  Observation:  These old cast wheels vary with regard to trueness and run-out.  Amount of weights required to properly balance ran from a very respectable 3/4 oz. on one to the worst which required a total of about 8 oz. (which will be relegated to the trunk). Glad it's over...I was losing sleep in anticipation.
Title: Re: Any words of wisdom for dismounting and mounting tires on 10-spokes?
Post by: werthie on April 13, 2019, 03:46:28 PM
If you live in the Los Angeles area, I highly recommend P Zero World on Santa Monica Blvd for mounting/dismounting our '66 ten-spokes:

https://pzeroworld.pirelli.com/en-us/los-angeles/overview

they have state of the art equipment, and the technicians really know their stuff.

they also sell new repros of the Pirelli CN36 in various sizes.  i have a set on my Bugeye.

alan
6S929