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TR3 Wheel And Tire As A Spare ?

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  • TR3 Wheel And Tire As A Spare ?

    I am to the point in my restoration where I need to buy a spare tire for my '71 TR6. I know several folks who run TR6 rims and tires on their TR3; has anyone tried or considered going the other way and running a stock TR3 tire (165R15) and rim on a TR6 - in my case strictly as a spare? The TR3 tire diameter is 25.4, just one inch smaller than the stock TR6 tires, and also a bit narrower. I'm thinking this may work as a spare, allowing me to run normal speeds and distances if necessary (albeit carefully). It should also fit nicely into the trunk spare tire compartment. This is as apposed to using a compact spare which has a 50 mile and 50 mph limit. I know the bolt pattern is the same, I'm just wondering about offset issues and front suspension clearances, which is why I'm asking if anyone has actually tried it. Experiences, opinions? Thanks.

  • #2
    Good question, don’t know. But why not just use a stock TR6 wheel, you know those fit if you mount a close to stock tire.
    I72 Pimento w/overdrive

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    • #3
      Thanks for the reply. Yes, that was my first thought also. But, stock size tires are kind of pricey: either $180 at Tire Rack, or about $220 at Coker. I can get a stock size TR3 tire for under $100. I hate to boil it all down to just dollars, but it is just a spare after all. Also, my Tr6 project came as a roller, with TR3 wheels and tires on it just so it could be moved around. Now that I have put tires and wheels on the car, I have plenty of extra TR3 wheels laying around, but no TR6 wheels. I'm thinking that using a TR3 wheel and tire might be a good compromise between using a regular stock TR6 tire and using a compact space-saver spare. I dunno, still thinking about it...

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      • #4
        You could look for a space saver spare from a junkyard near you...those you can get for cheap. Do a search on here and you will find what vehicles spares will work on the TR6.

        This is will save you some space in the trunk as well.

        Cheers,
        Tush
        81 Alfa Romeo Spider Veloce, 81 Triumph TR8
        73 Triumph TR6 CF4874UO, 68 Triumph TR250 CD5228LO
        62 Triumph TR4 CT6716LO, 60 Triumph TR3A TS69891LO
        60 Triumph TR3A TS64870LO, 59 Triumph TR3A TS44836LO

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        • #5
          Well if you already have TR3 wheels and tires you’re all set to test it out.
          Last edited by lfmTR4; 05-13-2019, 09:00 AM.
          I72 Pimento w/overdrive

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          • #6
            Oddly enough, I’ve never tried it...

            Cheers,
            Tush
            81 Alfa Romeo Spider Veloce, 81 Triumph TR8
            73 Triumph TR6 CF4874UO, 68 Triumph TR250 CD5228LO
            62 Triumph TR4 CT6716LO, 60 Triumph TR3A TS69891LO
            60 Triumph TR3A TS64870LO, 59 Triumph TR3A TS44836LO

            Comment


            • #7
              Another thought comes to mind. In all of the years (30+) I have had a TR6, I have never had a flat tire. I am running 6" ARM wheels with 205-70 tires. The thought crossed my mind as whether this combo would even fit in the trunk/spare tire compartment, if I did have a flat. The spare is an old stock wheel with an ancient 185 redline tire.
              Berry

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              • #8
                That's one of the reasons this whole TR3 wheel/tire as a spare idea came about. I just put 16" wheels on my TR6 project along with 205/65 Michelins (Costco had a pretty good sale). I couldn't get that combo to even fit into the trunk, let alone get it into the spare tire compartment. If I had a flat and used the TR3 spare, I would have to put whatever was on the luggage rack into the trunk/spare tire well and strap the 205/65 onto the luggage rack. There are some disadvantages to running bigger than stock tires on your TR6, I suppose - but then again, there are plenty of advantages also.

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                • #9
                  Just another thought. Many years ago I had a TR3. The spare was a smaller dia. bias ply tire, while the other 4 tires were 165 Michelin. I had a flat and mounted the spare, unaware of the difference in size. A few hundred miles later, the diff developed a nasty vibration and an autopsy showed the carrier bearings were the culprit. I don't if it was caused by the unequal sized tires on the rear or just a coincidence.
                  Berry

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                  • #10
                    I am running 205/55x16 tires on my TR6. For a spare, I am running a 165x15 tire on a stock TR6 rim. It just fits into my spare tire well under the big aluminum gas tank I have back there. More importantly, it is very close to being the same diameter as my 205/55x16 tires, and it isn't a space saver, so if I had an issue on the road, I could drive at normal speeds for normal distances. My only problem would be finding a place in the car for the big wheel and tire if I had a flat. But I think I have that figured out.

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                    • #11
                      I also was concerned about the tire diameter difference affecting the diff. If one of the rear tires has a flat, I'm thinking that I would move one of the front tires to the rear and put the TR3 spare on the front. Sounds like quite the hassle, but then I could run pretty much normally without worrying that I was tearing up the diff with different size tires on the rear. I ordered one 165/80-15 from Amazon yesterday, about $55 with free shipping. If I was actually going to use the tire for an extended amount of time I would have gone with the Vredestein at $123, but for a spare, the cheapo tire will do. BTW, I have the Vreddy's on my TR3 and love them; a great tire.

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                      TR3 Wheel And Tire As A Spare ?

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