they're a very nice wheel - there are only 2 sizes of supelites where they really got the look right - this 13*7 and the 15*8 * spoke Superlite. That's what I'll be getting for my HR30 Skyline.

205/60*13 may be too big in diametre for the standard wheelarches at that ride height, but 195-205 are pretty much ideal on a 7" rim.

my coupe with 13*7 Superlites & 205/60

my coupe with 14*7 & 195/60

You're obviously going for the stretched jap look and/or trying to fit them without too much gaurd work. I'd go with 185/60*13. It will give the look you want, and be the right size for your speedo (but I have always found the speedo to be more accurate with a much larger tyre in reality). Even with a 185/60 the tyre fitters will be cursing you!

185x60x13 tyres measure 552mm in diameter, the same as the 1000's 5-50x12's which is smaller than the 1200's stock size [574mm]
I too have found that slightly larger diameter rear tyres usually brings the odometer much closer into line with true distance traveled, & if the odometer is right, then the speedo is usually closer to the mark too.

1200 had a 155SR12 standard fitment = 155/80*12, which is almost identical to a 185/60*13 give or take 0.6mm

what size tyre did you think 1200's came with? I doubt you'll find a 574mm tall 12" tyre!

Quote: I was using the standard original size as quoted on the back page [Specifications] of my November 1972 Datsun 1200 sales brochure.
The only size listed for Datsun 1200 Coupe, Four Door Sedan & Five Door Wagon in this brochure is the 600x12x4 ply tyre.

I then went to my Tyre & Rim Association. Australia. Standards Manual, & under the chapter 'Suplimentary Data' on Page S-03, sub heading 'General Data' it quotes the 6.00x12" tyre as having a new tyre diameter, at standard inflation pressure, on a design rim width of 4" as being 574mm for the 'Highway Traction' tyre & 589mm for the 'Deep Traction' tyre.

My September 1972 edition of the Datsun 1200 owners manual, page 31, lists both the standard 6.00x12x4 ply tyre as well as the 155 SR12 radial which, according to this manual, was offered as an 'option', not as standard fitment.
The 155 R12 is listed in my book as having an overall diameter of 554mm for the 'Highway Traction' tyre, & 560mm for the 'Deep Traction Tread' version. As you correctly said, this compares most favourably with the 552mm of the 185x60x13.
The additional letter 'S' in 155 SR12 was a speed rating [180 kph I believe] & has no bearing on tyre dimentions.

The way I remember it when my stepfather was selling 1200's new from his Datsun dealership [D&G Motors. Blacktown], most new Datsun 1200's in Australia left the showroom with the standard 6.00x12's in place.

With a 'standard' tyre size of 574mm, & most 1200's currently running the smaller 552mm & 554mm sizes of the radials, it's no wonder that the speedo's are off. [Reading faster than actual speed]

EDIT. Additional info.
The Scientific Publications, Datsun 1200 Workshop Manual No. 87 [not the later Gregories version of this same manual] reproduces two road tests from 'Wheels' magazine of two 1200 Sedans [auto & manual] as well as a manual Coupe. [Pages 220 & 221]
The two sedans were fitted with the 6.00x12 cross ply tyres while the coupe had the 155 SR12 radials.

This would tend to support the assertion that the cross ply tyres, [at 574mm], were widely used in Australia.

should have remembered I was talking to someone form the cross-ply era! I obviously used the standard radial tyre size, as I wouldn't have a clue how to size a cross ply and they're a bit hard to source these days :P Its very strange that Datsun recommended a radial tyre size that much smaller than the cross ply's size though

I have always said a 205/60*13 or 185/60*14 seems to make the speedo more accurate, and know I know why - they are pretty much bang on the 600 12 cross ply's size apparently! they look absolutely huge in the 1200's gaurds though!

In my view, the larger 205x60x13 [or equivalant] size belongs under the rear. This helps to bring the speedo error under control while filling up the wheel arch a little better. This also allows one to run standard, or preferably, near to standard height suspension without such a large gap between the tyre & wheel arch, which in turn allows more suspension movement & a better ride.

For the fronts I prefer the smaller 185x60x13 size [or equivalant] as this instantly provides a little 'rubber rake' & also allows for a 2" lowering job without the usual hassles that are experienced with the larger diameter tyres.

It's all a matter of balance, but yes, it's not the cross ply tyre that matters, it's the diameter of whatever original tyre that they used thats important, & I agree, the 20mm difference between the original cross ply & the optional radials seems to be quite a bit, but that's what they offered. Most odd.

P.S. According to my book, the 185x60x14 measures 578mm,which is only marginally larger than the stockers & would probably prove to be a very good choice for someone who logs up a lot of road miles.
I'm currently running 185x65x13's [570mm] on the rear of my coupe. I figured that with a stock 1200 engine & auto, at 2,500 ft/762m elevation where I live, [thinner air] the poor little thing needs all the help it can get.

L18, I can measure a near new 12" crossply for you, my partners car has one in the boot. I'll take a photo of it too.

I put my 215/55/13's on a 61/2" rim - on my old mans wagon, looked so dragster - but very close to scrubbing so he flicked them off.

fatness!

some bolt-on flares and that would be perfect

I would have thought that 205s would be the ideal size for a 7 inch rim, what is the problem?

The car being nice and low stis her on the 60series tyre nicely, I can see the jack .. And the offest with the deep dish rims will sit the rim out further.

Isnt a 175 tyre too small for the 7inch rim?... Will have to go bigger....175mm =6.8inch 185 tyre will do it.

Where can I get me a set of these???

there was a set on ebay (adelaide) for $350 buy it now a week ago. There is a set of 6 on there now for $600+
I'm getting a pair with avons for free on wednesday :) 13x7 -7offset I think.

What offset are you running?