295/65/15 tire size question

-
cawley

cawley

383 Bcuda
Joined
Sep 10, 2013
Messages
2,340
Reaction score
674
Location
milton
I know this question was probably asked many times. Anyone hear running 295/65/15s ? If so what did you have to do to get them to fit ? spring relocate, mini tub Any pictuers
 
cawley said:
I know this question was probably asked many times. Anyone hear running 295/65/15s ? If so what did you have to do to get them to fit ? spring relocate, mini tub Any pictuers
Click to expand...
3/4" offset spring hangars, stretched front of fender well to the inner fender panel- same shape as stock, a little massaging inside in a couple of spots. wheel offset is '' CRITICAL''. ----68 barracuda fastback,dana 60 w/ disc brakes.
 
famous bob said:
3/4" offset spring hangars, stretched front of fender well to the inner fender panel- same shape as stock, a little massaging inside in a couple of spots. wheel offset is '' CRITICAL''. ----68 barracuda fastback,dana 60 w/ disc brakes.
Click to expand...
On my barracuda I moved the springs in, moved the inner tubs in 1.5 inches. I wanted to keep the fold down seat. I also narrowed the rear 1.5 inches from each side. I am also going to run rear disk brakes.
 
cawley said:
On my barracuda I moved the springs in, moved the inner tubs in 1.5 inches. I wanted to keep the fold down seat. I also narrowed the rear 1.5 inches from each side. I am also going to run rear disk brakes.
Click to expand...

Sounds like you should have plenty of room side to side, assuming the backspacing is correct on the wheels. A 295/65 is a tall tire though (about 30" if I'm remembering correctly). As famous bob said, you likely have to do something to accommodate the height by either stretching or trimming the front of the wheel arch, moving the rearend backwards, or a combination of both.

Here's an example:
Dart rear wheel openings
 
A little quick math shows that tire to be 22.5" high and 11.5" wide. That is considerably larger than the 225/40/17 (approx. avg.) tires a lot are using. A 225/40/17 will be about 20.5 high and about 8.75 wide.
 
harrisonm said:
A little quick math shows that tire to be 22.5" high and 11.5" wide. That is considerably larger than the 225/40/17 (approx. avg.) tires a lot are using. A 225/40/17 will be about 20.5 high and about 8.75 wide.
Click to expand...
Might want to recheck your figures. 295/65/15 is 30 inches tall. 11.6 wide.
 
mopowers said:
Sounds like you should have plenty of room side to side, assuming the backspacing is correct on the wheels. A 295/65 is a tall tire though (about 30" if I'm remembering correctly). As famous bob said, you likely have to do something to accommodate the height by either stretching or trimming the front of the wheel arch, moving the rearend backwards, or a combination of both.

Here's an example:
Dart rear wheel openings
Click to expand...


I'm going to highly recommend moving the rear back in lieu of stretching the quarters. Much faster, easier and WAY WAY CHEAPER.

Silver car is stretched. Purple is moved back.

00F0F_gJMaPqYfZVV_600x450.jpg


16378_10204960777488574_6317630999826702274_n.jpg
 
harrisonm said:
A little quick math shows that tire to be 22.5" high and 11.5" wide. That is considerably larger than the 225/40/17 (approx. avg.) tires a lot are using. A 225/40/17 will be about 20.5 high and about 8.75 wide.
Click to expand...

Not sure where you're getting those numbers, but I sure hope the OP doesn't think his 295/60/15s will only be 22.5" tall.
 
mopowers said:
Sounds like you should have plenty of room side to side, assuming the backspacing is correct on the wheels. A 295/65 is a tall tire though (about 30" if I'm remembering correctly). As famous bob said, you likely have to do something to accommodate the height by either stretching or trimming the front of the wheel arch, moving the rearend backwards, or a combination of both.

Here's an example:
Dart rear wheel openings
Click to expand...
**** ! I forgot to mention I moved the rear back I think an 1/2 inch. I did it some time ago that's way im not to sure. I do know it was at least an 1/2 inch
 
cawley said:
**** ! I forgot to mention I moved the rear back I think an 1/2 inch. I did it some time ago that's way im not to sure. I do know it was at least an 1/2 inch
Click to expand...

One easy way to check is measure clearance with the tires you have now at the front wheel arch and calculate how much room you'll have with a 30" tall tire based on the clearance you currently have. I'd be willing to bet moving the rear back 1/2" won't cut it. A 30" tall tire is a tall one for sure.
 
mopowers said:
One easy way to check is measure clearance with the tires you have now at the front wheel arch and calculate how much room you'll have with a 30" tall tire based on the clearance you currently have. I'd be willing to bet moving the rear back 1/2" won't cut it. A 30" tall tire is a tall one for sure.
Click to expand...
Thanks if not I guess I will go with 275/60/15s
 
mopowers said:
Not sure where you're getting those numbers, but I sure hope the OP doesn't think his 295/60/15s will only be 22.5" tall.
Click to expand...
Duh. I feel like such a dummy. I set up a formula in Excel and forgot to put a 2 in front of the sidewall height in the formula. I was in a rush and on my way out the door earlier and CERTAINLY should have noticed that. Sincere apologies to all. Correct formula for 295-65-15 tire diameter is 2((295/25.4)*(65/100))+15. And diameter is 295/25.4. So a 295/65/15 tire is 30" high and 11.6" wide; while a 225/45/17 will be 25" by 8.9". I can't believe that I made that mistake and didn't catch it
 
harrisonm said:
Duh. I feel like such a dummy. I set up a formula in Excel and forgot to put a 2 in front of the sidewall height in the formula. I was in a rush and on my way out the door earlier and CERTAINLY should have noticed that. Sincere apologies to all. Correct formula for 295-65-15 tire diameter is 2((295/25.4)*(65/100))+15. And diameter is 295/25.4. So a 295/65/15 tire is 30" high and 11.6" wide; while a 225/45/17 will be 25" by 8.9". I can't believe that I made that mistake and didn't catch it
Click to expand...
I would never move my rear end back, if u move it much, u will have a driveshaft that is too short, and the farther back u move it the less weight u have on the rear wheels. remember the first funny cars, they moved the rear end forward to get "more" weight on the rear wheels. I did use an 1/8" spacer on one side to square the rear up. and my m-t drag radials are 29 1/2" tall------jfyi.
 
famous bob said:
I would never move my rear end back, if u move it much, u will have a driveshaft that is too short, and the farther back u move it the less weight u have on the rear wheels. remember the first funny cars, they moved the rear end forward to get "more" weight on the rear wheels. I did use an 1/8" spacer on one side to square the rear up. and my m-t drag radials are 29 1/2" tall------jfyi.
Click to expand...

Driveshaft yes.

Weight transfer, in theory yes, in practice no. Trust me, tried and true, I've done it both ways and it won't affect the hookup of your car AT ALL. This is why I stretched my first car instead of moving it back. What a waste of time, money and resources. Never again. I'll spend my money elsewhere.
 
I moved the rear back on a 65 Falcon for the same reasons. I did have some pinion angle issues to resolve, since the leaf spring is an arc, moving it back caused the pinion to point down. Just check the pinion angle before you move anything, and set it back to that when you move it with angle shims.
 
furyus2 said:
I moved the rear back on a 65 Falcon for the same reasons. I did have some pinion angle issues to resolve, since the leaf spring is an arc, moving it back caused the pinion to point down. Just check the pinion angle before you move anything, and set it back to that when you move it with angle shims.
Click to expand...
I still wouldn`t move mine back, too much h.p. and need all the traction I can get. not tubbed .
 
cawley said:
**** ! I forgot to mention I moved the rear back I think an 1/2 inch. I did it some time ago that's way im not to sure. I do know it was at least an 1/2 inch
Click to expand...
I think a 30" Tall tire would look Fantastic. I would love to put a set on My Duster but that is Dreaming For now. I like a tall tire look.
32898c33.jpg


What did you do to move your rear end back 1/2?
 
limegreen70 said:
I think a 30" Tall tire would look Fantastic. I would love to put a set on My Duster but that is Dreaming For now. I like a tall tire look.
View attachment 1715036664

What did you do to move your rear end back 1/2?
Click to expand...

I run those same Mickey's on my other car. But the Duster got 275/50/17. The Mickey's have way too much sidewall for handling. They also don't like a lot of psi or they eat the centers out. I run them on a 15x10.
 
I run 25psi in the rear on my MT rubber on the street and 18 at the strip.
 
OK, here is what I got. Inner wheel well to inner quarter panel lip-13 inches wheel mounting surface to inner quarter lip-6 3/4 inches wheel mounting surface to leaf spring- 8 inches wheel mounting surface to inner wheel well- 6 1/4 inches.... If this all makes sense LOL
 
Your limiting factor for height is the front edge of the wheel arch. What's you axle centerline to front wheel arch measurement?
 
You must log in or register to reply here.
-

Back
Top