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Triumph TR6 - Changing Wheel Size

I am contemplating some aftermarket wheels for my 76 6.

By my reckoning, the standard 15 x 5.5J was a 4 x 4.5 bolt pattern (akin to 4 x 114.3 patterns described in modern wheels) with an offset of +12mm

The wheels I am considering are 16 x 6.5 4 x 114.3 and have an offset of 35mm, which if i understand correctly moves the wheel into the wheel well by 23 mm.

I will match overall wheel/tire size with 205 55's or 60's to maintain approximate equal sizing to my current setup.

I am concerned though about the change in offset and if 23 mm will be problematic re clearance to suspension. I am not concerned re clearance to the well rim since I will maintain about 2 inches clearance to the top of the tire.

Can anyone offer some insight here, am i correct in being concerned and have i missed any other potential problems with the change in offset (stress to the assemblies etc)

any advice welcome

thanks

bob
Bob Craske

Bob:

Moss Motors' latest "British Motoring Magazine", Vol # 1, Winter 2005 has a good article on Tire & Wheel Plus Sizing by Kelvin Dodd. It lists two performance alternatives for the TR6. First, a 195/65 - 15 and second, a "+1" option citing a 16" diameter wheel with 205/60 - 16 tire, which seems to meet your requirements. The article cautions against the 205 series tires if the car is significantly lowered from stock. If you can't get the magazine I can probably get the article scanned and e-mail it to you. Good luck.

Bob
'76 TR6
Bob Evans

Bob

I hope your license plate isnt BOBS76 6!

Thanks, i would appreciate if you could get me a copy of that article, i hope it speaks to the selection of wheels and the effect of different offsets?

thanks

Bob
76 6
Bob Craske

Bob:

Nope. But it's a good idea! Is that your plate? My car has the Washington state front plate MTR -something or other. Tried to keep it original from the front anyway. My vanity plate would probably read - BNKRPT6 - it's costing me a few $$. You should get a pic of your car on Charlie's website. Check out the "NEW MEMBERS" thread. The only brand the article mentions is the Moss Panasports in a +2 configuration. I guess you'd have to search for other brands. It does deal with offsets.Will drag the article to work Thurs. & scan & try to e-mail Thurs nite.

Cheers,
Bob
Bob Evans

Bob
Good plate...we all know the feeling:)
Rick C
Rick Crawford

Has any one ever used other wheels other than the Panasports?

I would like a 16" set of wheels, what other options do we have?

Could you send me a copy of that articale?
Colin Wilson

Guys:

I got the article scanned today but page 2 got all gnarly; probably too many pics/diagrams. We're trying page 2 again on the scanner at work tomorrow. Didn't want to PO anybody by sending 2 of 3 pages. Stay tuned.

Bob
'76 TR6
Bob Evans

Bob- What's with the Wa.St. front plate. Last time I checked a map, Nuffy was a far distance from the great NW.
Don k.
DON KELLY

Have you seen the wheel adapters for 4x100mm wheels? They give you hundreds of choices for wheels. Offered on ebay for around $225. If they aren't listed on ebay now, keep checking every few days. 4x100mm is the size of the new Mini Cooper and many Japanese cars so you can choose from the Coopers factory 16 and 17 inch factory minilites to endless aftermarket wheels. You can even find up to the 18" (pimp my ride) wheels. These adapters are 26mm thick so look for wheels with that amount of positive offset plus or minus some. Most of the aftermarket wheels I checked out on the Tire Rack website have this offset. I bought a set of these adapters and they are nice. They come with the lugs and studs for installation.
steve

Steve

I have contemplated this approach having seen these listed all over the place...is there anything specific regarding their material used that I should be aware of. They certainly open up the options..

if original steel wheels were 12 mm+ offset, then one should be looking for 35-40 as the range of acceptable offsets with the new wheels and this would then ensure that mounting position in the wheel well is identical to original?

thanks

bob
Bob Craske

bob
Your calculations are correct. The adapter supplier recommends 35-45. Also this will probably put added strain on suspension parts so make sure axles and hubs are good.
Steve

Don:

It's a small bragging right to have a West coast US car here in the East. There are a lot of California classics here in Nfld (mostly Chevy, Ford and Mopar) but a few LBC's. We like to go to the A&W on Thursday Cruise Night and PO the muscle car guys with our classic LBC's, which really draw a crowd 'cause the LBC's are better looking cars anyway! I've seen some comments here on this thread regarding people being surpsised that there are LBC's & other classics in Nfld but seriously, there is a very big classic car movement here and the cars are awesome - I've seen some Barrett-Jackson candidates here at the A & W. Most guys run the front plate from the state of origin with the provincial antique plate on the rear. I purchased my TR6 in Kelowna, BC but it lived its previous life in Washington, hence the WA plate for provenance. Anyway, being originally from Connecticut I kind of like my US plate. Sentimental thing.

Cheers,
Bob
Bob Evans

Colin, for what it is worth Panasports come in 16" now.
Chris
Christopher Trace

It is my understanding that stock steel wheels have 0 offset. That is to say that they are on the centerline of the wheel. Has anyone measured this? I have looked into adapters and have found a website that sells all sorts of adapters. Try adaptitusa.com.
NFI.
John
John Korsak

John

I was of the impression that stock steel wheels were 12 mm offset? Can someone out there set the record straight?

bob
Bob Craske

I went out and measured my spare wheel. Your are correct, there is an offset. I calculate between 8 to 9.5 mm of positive offset.
john
John Korsak

Has anyone seen the new Konig Rewind wheels? Similar to the Minilites in style. They have a 15" X 7" wheel with TR6 bolt pattern (4 x 114). Just wondering if I will have any clearance issues on my TR6 with the additional 1" width. I have the rear shock conversion kit installed as well, so I didn't know if that was a factor.
Gary Wilmerding

Gary ,
I'm almost certain that 7" wheel/tire will rub on the top of the shock conversion.
I run 15x6" panasports with 215/65 R15 tires and before
I had it 4 wheel aligned I did get some rubbing on the back wheels and they were not that far out of true.
I have no problems now that the alignment is done.
Unless they have put the extra inch on the outside I would think twice before investing that kind of
money.
Chris
Christopher Trace

This thread was discussed between 03/02/2005 and 17/03/2005

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