Original on all North American spec Mantas was 165R13 on 5” wide steel rims (1971-1974) and on 5.5” steel rims in 1975.what tyres are you fitting to your Manta?
do you know what was original?
My 73 Manta came with 165R13 bias-ply tires. I had them put 185/70-13 Michelin X radials. I can't remember the brand. So Opels didn't come with good tires.the CN36 is currently the best tyre for cars of that period except possibly the Michelin XDX.
i wondered what brand and tread they fitted originally
Manta Rallier - have you got some pictures of your car on CN36. i bet they look great
My 73 Manta came with 165R13 bias-ply tires.
Bill, having stripped hundreds of Opels over the years, I’ve definitely noticed that OEM tire choice seemed to be a regional thing.I have several original tires from two different '75 Opels (Manta and 1900). They used Goodyear G800+S steel belted radials in 165SR13 size. Here are some photos of one. Note the Opel branded tire weight!
165 13 bias ply tires must be an American specialty, because over here bias ply tire widths were always expressed in inches.I see what you did there!
If they were 165R13 then they would be radials. 165B13 would be a bias ply!
FWIW, most of the original spare tires I’ve pulled from Mantas and Asconas have been Goodyear Polyglass tires, 165-13. Bias ply.
Though the later cars often had radials fitted (dealer option, same size).
To add confusion to that...in America various tires were expressed in inches, in P-metric, or in letter sizes.165 13 bias ply tires must be an American specialty, because over here bias ply tire widths were always expressed in inches.
Ahhh! Then they came out with the 60-series tires (Height = 60% of width). I replaced the original 165HR-13 tires on my 1970 GT with Goodyear A60-13 polyglass tires that looked really neat, just like real racing tires and with raised white lettering (okay, so I was young...). This alone made the car impossible to handle, especially in wet weather -- the front end just plowed ahead forever.To add confusion to that...in America various tires were expressed in inches, in P-metric, or in letter sizes.
So you could have, for example, 6.4-13, or 165-13, or even A78-13.
Kind of looks like a radial to me with the way the tread wraps around the shoulders. Does it say bias ply or radial on it anywhere?I found this as the spare in my 74 Manta. I would guess this is one of the original tires that got moved to the spare when the radials got mounted. Looks like a bias-ply to me.