DR70h14

I was hoping someone would know the diameter of a DR70h14 that came standard on an A9X -I think they about the equal to 195/75x14.

What tyre sizes would I buy for 15 x 7 and 15 x 9.5 rims that are the same diameter as the standard tyres? I'd like the fronts to be about 205 or 225 and the rear to be about 265 or 275.

I really want all 4 tyres to be the same brand. Any advice on where to get these in Sydney or thereabouts?

Todays equivelant of a DR70H14 is a 195/70R14. These have a diameter of 628.6 MM. A 205/60R15 or a hard to find 245/50R15 would be closest.

Try Milperra Tyres, ph: 9792.2999 ( ask for Rod, tell him that the guy with the Green L34 Torana sent you )

How did you work out that 628.6mm is the diameter? Is it a formula or do you have a chart?

I want to go for a slightly bigger rear than 245 - I've got 245's x 14 on the rear now and they aren't wide enough! I've also got 245's on the front and they are too big, they scrape on the flares. That 205 sounds perfect!

I reckon 275 would look better from behind if the sidewall is not too high - like a 45 or 50 series.

Does anyone make a 205/60r15 and a 275/??r15 in the same pattern? I'd love something that looked a bit 70's, BF Goodrich or whatever.

I had a 235 wide tyre on a 8" rim that didn't scrape on the front with flares. Changed to 225 so that steering was easier when parking.

Using different diameter rear tyres will affect your speedo accuracy.

Edited by JBM, 19 March 2006 - 12:21 PM.

I found some specs on the original DR70H14 tyres today. The diameter I posted was for todays equivelant 195/70R14. The actual diameter of a DR70H14 is 625 MM.

JBM, Yeah, my tyres are 245/60/14 and they are too high and that is why they rub.

I was told by a mate in the tyre game that they where the same height as the standard tyre - but they are 650mm high. 25mm higher (thanks Chopper) than the standard tyre. No wonder they rub on the front guards when I turn as they are 50mm wider and 25mm higher!

I also googled 'tyre height calculation' and found a UK website - http://www.tyresave....k/tyresize.html - that works out the heights of all different combinations.

Also, I don't mind a higher rear tyre. My cars got a 3.08 diff now instead of a 2.60 it came out with, and I'm more interested in the look from behind than the the right tyre height. A tyre about 625mm high on the front is good (205/60r15 is 627mm high) and a rear about 650mm is OK for the rear (275/50r15 is 656mm high).

If anyone knows if I can get a 205/60r15 and 275/50r15 in the same brand then let me know.

I have got the original service letter that got sent to all Holden dealerships dated the 1 August 1975 for the L34's. The type is DR7014 Blackwall Radial Ply with a rolling circumference of 6.3768 ft (1.9636 meters).

I've got that too. That's how I came at a diameter of 625 MM.