TIRE QUESTION

[elcamino/wheelhorse 9,297]

NEED TO REPLACE REAR TIRES ON 312-8  MANUAL CALLS FOR 22X9X12  TURF TIRE

Will I have any problems using a 23x8.5 x 12 turf tire  ( best price I have found so far.)

[ri702bill 8,318]

Should be fine - slightly taller - what is the width of the rims you have??

Bill

[Pullstart 62,850]

Slightly taller by number, but probably the same or shorter physically…

[elcamino/wheelhorse 9,297]

Not sure of rim size , tires on it now are 22x9x12 

[Pullstart 62,850]

5 minutes ago, elcamino/wheelhorse said:

Not sure of rim size , tires on it now are 22x9x12 

Likely a 12x6 or so.  It’ll be fine 

[RandyLittrell 3,877]

Should be a 12x7 wheel and 23x8.50's will work perfect. Carlyle seems to run true to number, but many others are way smaller than what is on the sidewall. 

 

 

 

Randy

[pfrederi 17,739]

Not so sure guys.  My 310-8 had the 22" tires.  The rims were only 5".  Measure the length of the yellow line between two blue ones.  1"  means a 5" rim  3" is a 7" You can mount the 8.50 but it will be bulgy!!

 

 

[doc724 925]

you might be correct on the rim width v. the "yellow line"  However I found that over the years, WH changed the position where the center spider was welded to the rim.  The rim width was the same at 7 inches, just the offset was different. 

[Pullstart 62,850]

45 minutes ago, pfrederi said:

Not so sure guys.  My 310-8 had the 22" tires.  The rims were only 5".  Measure the length of the yellow line between two blue ones.  1"  means a 5" rim  3" is a 7" You can mount the 8.50 but it will be bulgy!!

Paul most 6-12’s were on 4” or 5” wide wheels.  I’m not doubting that your 310 had them, but I find it hard to believe they were on it when built.  Here are some wheels, a 5” and 7”.  The 5” isn’t the BEST example, it’s riddled with rust holes and no valve stem so I couldn’t bead the tire.  
 

Wheels measured inside the lip, where the bead mounts.  Tire used is an old Carlisle 23x8.50-12

 

 

 

 

[Pullstart 62,850]

2 minutes ago, doc724 said:

you might be correct on the rim width v. the "yellow line"  However I found that over the years, WH changed the position where the center spider was welded to the rim.  The rim width was the same at 7 inches, just the offset was different. 

Wheel width is measured at the lip (red line) anyway.  Yeah, the yellow line doesn’t mean anything really…

 

 

[8ntruck 6,999]

I was an engineer for 40 years in the steel wheel industry.  Rim width is measured between the tire side of the flanges - as @Pullstart demonstrated.  Measuring the width of the drop well from the disc flange is a quick and dirty way to estimate the rim width - IF you know the other reference points on that family of wheels.

 

If 22x9-12's were mounted previously, going to a 23-8.5 x 12 will not be a problem on that same wheel.  You will get about 1" more diameter, but loose 1/2" section width in the tire (slightly narrower tread width). 

 

 

Edited December 14, 2022 by 8ntruck

[pfrederi 17,739]

Parts manual does show 5" rims for some 308 310 312 depending on  the year (and what WH had left over from previous years maybe)

 

Backset on the 5" rims was 1-3/8 just like the 7 Inch rims.

 

Note difference on this 7" rim

 

I was just trying to give a quick way of making sure he didn't have eh narrow rims....with out demounting and measuring.

 

 

 

Edited December 14, 2022 by pfrederi

[Ed Kennell 38,170]

4 hours ago, elcamino/wheelhorse said:

Will I have any problems

Being familiar with some of your project stories, Yep, if you mount them, you'll have some problems.   

[elcamino/wheelhorse 9,297]

Don't go there Ed this week has been a big PITA so far.

[Ed Kennell 38,170]

21 minutes ago, elcamino/wheelhorse said:

Don't go there Ed this week has been a big PITA so far.

[RandyLittrell 3,877]

4 hours ago, pfrederi said:

You can mount the 8.50 but it will be bulgy!!

 

 

If stock is 9" wide, it would be less bulgy than stock. My 1985 310-8 had 7" wide wheels on it. 

 

 

 

Randy

[pfrederi 17,739]

3 hours ago, RandyLittrell said:

 

If stock is 9" wide, it would be less bulgy than stock. My 1985 310-8 had 7" wide wheels on it. 

 

 

 

Randy

I meant if he mounted it on a 5" rim

[squonk 41,100]

Too bad you don't have the wider rims. I have a pair of brand new Carlisle 10.50 turfs I'd give you the Waldo deal on.

[953 nut 55,218]

21 hours ago, elcamino/wheelhorse said:

23x8.5 x 12 turf tire  ( best price I have found so far.)

If the 23" tall tires are Deestone Tires be aware that they tend to be undersized. Their 23" may not even be as tall as the 22" tires you are replacing.

[Lee1977 6,659]

On 12/14/2022 at 10:25 AM, elcamino/wheelhorse said:

NEED TO REPLACE REAR TIRES ON 312-8  MANUAL CALLS FOR 22X9X12  TURF TIRE

Will I have any problems using a 23x8.5 x 12 turf tire  ( best price I have found so far.)

I've never seen a 312 with less then 7" wide rear rims.  Thge 22x9x12 tire3 hat came on my 312 were wider then the 23x8.5x12.