Kielbasa do you have any more pics of your car with this set of tires that you can post??? Especially from the side, front and rear low angle if possible. Do you know the offsets of your rims and any clearance issues you see coming when you get it on the road? Any input would help me greatly, thanks.

the front rims are original, so I do not know their offset - however they came from the factory. They will barely rub the frame at full lock.
The rears have 4 1/2" backspacing.
Clearances in the rear should suffice (fender lip to tire)...i had 3 neighbor kids in the back seat, my wife and 2 daughters jumping in the trunk while I had my hand on top of the tire between tire and body lip - my hand never got cut, so I will assume it will be ok. Approx 3/4" to 1" clearance to leaf spring. But this is with 65~67 B-body rear end and offset shackles.

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Perfect, thanks for posting those pics they help a lot. I believe the stock 15 x 7 rally wheel had a 4.25 back space. My 15 x 7 front rims are 4.0 BS but I've converted to 11.75 disks, which I'm told, will increase my track width "less than a quarter inch per side". How much clearance do you have to your front fender lip at the top of the tire? How close is the tire to the front lower corner of the front wheel opening as you turn the wheel lock to lock?

ProTrac's are still available new from Coker, if you really want bias plies.

I ran ProTrac N50-15's on the back of my 64 300 and ProTracs 245-14's in the front.

They wander alot, especially in rutted roads. They hydroplane alot, especially if it's wet out at all.

I drove them from San Diego to Memphis and back, plus about 3 more years tooling around.

Great looks is about all I would give them.

http://www.summitracing.com/parts/cok-72146/overview/

I also converted from the stock discs (10.75 or whatever they were) to the cordoba 11.75 size.....the 15" rallyes did not clear the calipers. I had some custom spacers made, 1/8" thick, so the fronts are spaced out in the pics. Here are some pics...

another pic

and another

Thanks so much for the pictures and info on your front set up. You have been a great help. Got to take some measurements and crunch a few numbers but it looks like I have my tire issue resolved. Now we can stop discussing plywood disc wheels!!!

A 200-300 treadwear, stiff sidewall 255/50-15 would do everything I need and prevent me from needing a 17 inch wheel.

I'd keep my steelies forever if such a beast existed.

Tires of 15" for "competition" desires are very limited as well as sizes are limited. You'd need to look at your chosen club's rules to see what they allow for certain classes. Then, decide if you want them streetable (and to what extent.. daily, wknd, rarely?), or else, trailer them and mount at the track. Hoosier tires are stickiest DOT 15" tires out there, but they truly aren't intended to drive on the street/hwy, though some ppl do just to/from competition events on the wknds.

In response to Kielbasa: "I should have mentioned in the one pic with the front tire to fender corner measurement is with the wheel turned that achieves closest proximity to the fender."

That was very good to know, thanks for informing me.


"Let me know if you need more info, measurements, etc."

Thanks for your help, I surely will.

"I will say it's been a learning experience trying to get the car the way I want it (and I don't even have the drivetrain installed yet)! Every time I do what seems like a simple mod, turns out to be another adventure. Always seems to be some sort of hiccup (my 15" rallyes not clearing the cordoba calipers is an example, although that one was cheap and easy to fix)....."

That is hot roding in a nut shell. Change one thing and you'll end up changing ten others!

Let's steer this thread back onto the road. Although I'm a "neyophite" when it comes to road course/autocross/setting up a Mopar for handling I'm hardly new to building high performance muscle cars. The car I'm building now is the 8th build (7 A bodies, 1 E)that I've been heavily involved in, and that doesn't include other makes. This one is focused on optimizing the handling aspects, for highway performance and some "self competition" at the track. I call it my "Old man's hot rod" because it's going to have power steering, power brakes, OD trans, wipers, heater/defroster ect. I'm done with giving up live-ability and comfort for ultimate performance. My original question was to elicit responses from anyone who had experience with the MT SRs tires so I could determine if these were worth the expense vs just getting some cheap azz front tires so I could wear out the two sets of N50s I have sitting on the floor. Do I think the N50s are a performance tire? Hell no, but I have limited funds to allocate to my car so I have to st~r~e~t~c~h every buck to it's limit and use what I currently have on the shelves. Plus I have to finish building the car and need to buy a lot of equipment yet. Why not go 17s +? My axle width necessitates a 3" ish backspace on a 15x10 rim. I could easily fit a 17x11 with a 3.5~4" BS. Are there rims available with those specs, yes. Cheapest ones I'd spend my $ on are $465 each. Add in tires, shipping, mounting & balancing and your in the $3000 range. Chump change to some of you but that's a years worth of scrimping and scraping for me and I suspect a lot of others who frequent this site. I've got no issues using my old crap as it will wear out fast while I spend time testing and tuning the car. By then I will need new tires and hopefully will have the money saved up for those big hoops. I just wish a tire company would make a decent 15" performance tire in the wider widths. I don't really "need" 17" or bigger wheels to get the handling I want but they evidently don't think the economies are there to produce them. Kind of a self fulfilling prophecy, "if you don't build it they wont come". As many people I hear lamenting the lack of 15s I think they would be surprised at the sales.

You need to get past the "wishing" phase. We are all in same boat. I do wonder if the 15" tire molds still exist, or do they scrap/recycle them. If one size was the most sought after, wonder what it would take to have a company make a run? And if its not soon, I will be 100% non 15" soon on my cars.

Yep. A saying I'm fond of: "put your wishes in one hand and s--t in the other, see which one gives you a warm squishy feeling".