Original Spec Tyres for 13" rims

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RussGLAuto
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Original Spec Tyres for 13" rims

Post by RussGLAuto » Sat Jan 19, 2019 11:13 pm

Right then readers, looking to replace all five 18 year old tyres (surprised it passed the last MOT!). Would I be correct in saying that the original spec tyres for my car are Pirelli P600?

They don't make those any longer, would like to keep my 83 Mk2 as close to original spec as poss. I'm open to offers for suggested replacement 175/70/R13's that would please those aficionados among us.

Assuming Pirelli is the correct make(?), having done some research on the inter-webs I have found some possible candidates:

Pirelli CN36 Cinturato - these are real vintage spec and unlikely to be up to modern standards. But then, not planning on rallying any time soon...

Pirelli P4 Cinturato - a more modern replacement.

Thanks for your suggestions.

One more point, my speedo is way off, indicating 52 mph @ 60 mph GPS speed. Any thoughts?

Russ



GTXTRA
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Re: Original Spec Tyres for 13" rims

Post by GTXTRA » Sat Jan 19, 2019 11:27 pm

There wasn't really a set factory spec tyre back in the day on the non GTI VW's iirc - the P6 was always associated with the 14'' P Wheel of course.

E.G. My 82 CL had Pirellis on when i got it during 1985. My brothers 85 Jetta CL came with Michelins.

It's good you're dumping the 18 year old stuff - just go for quality.

Practical Classics mag runs a few adverts for modern tech but retro look tyres, worth checking out.


Serial Rocco-ist.........

mark1gls
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Re: Original Spec Tyres for 13" rims

Post by mark1gls » Sun Jan 20, 2019 10:44 pm

Normally most VWs over read by 5mph, speedo 60mph and gps reads 55mph not the other way round.
2 things could be wrong, someone has had the instrument apart and removed the needle then not put it back in the right place or you have the wrong type of cog at the end of the speedo cable inside the gearbox, there is 3 types of cogs in 3 different colours with different amount of teeth.

With the speedo needle there is a mark below the pin which you line it up with when removing the needle. (I can’t find the guide to this..) but you carefully lift the end over over pin and let it rest and it should line up with a white line below the pin.

Speedo drive cog, very carefully remove the cable from the gearbox as the plastic cog can fall off the end of the cable and if it drops into the gearbox it’s very very hard to get it out, the cog is held on with a C clip and common for that the fail and cog can easily fall off. Check what colour cog you have fitted.


Some info here.
http://www.brokevw.com/020ratios.html


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
Membership No. 323

RussGLAuto
Posts: 36
Joined: Sat Jul 14, 2018 11:51 pm
fill in the right answer: 15
Location: Spalding

Re: Original Spec Tyres for 13" rims

Post by RussGLAuto » Mon Jan 21, 2019 11:13 am

mark1gls wrote:
Sun Jan 20, 2019 10:44 pm
Normally most VWs over read by 5mph, speedo 60mph and gps reads 55mph not the other way round.
2 things could be wrong, someone has had the instrument apart and removed the needle then not put it back in the right place or you have the wrong type of cog at the end of the speedo cable inside the gearbox, there is 3 types of cogs in 3 different colours with different amount of teeth.

With the speedo needle there is a mark below the pin which you line it up with when removing the needle. (I can’t find the guide to this..) but you carefully lift the end over over pin and let it rest and it should line up with a white line below the pin.

Speedo drive cog, very carefully remove the cable from the gearbox as the plastic cog can fall off the end of the cable and if it drops into the gearbox it’s very very hard to get it out, the cog is held on with a C clip and common for that the fail and cog can easily fall off. Check what colour cog you have fitted.


Some info here.
http://www.brokevw.com/020ratios.html
You're quite right, speedo reads 60 and GPS shows 52 mph. Senior moment sorry. I guess that's close enough for 1983! A new set of rubber might sort that out anyway.

Good info though thank you.



mark1gls
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Re: Original Spec Tyres for 13" rims

Post by mark1gls » Mon Jan 21, 2019 11:20 am

Yes try new tyres and see if it's any closer as they will have more tread on them.
Update us when you have and tested the speedo. :good:


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
Membership No. 323

RussGLAuto
Posts: 36
Joined: Sat Jul 14, 2018 11:51 pm
fill in the right answer: 15
Location: Spalding

Re: Original Spec Tyres for 13" rims

Post by RussGLAuto » Thu Jan 31, 2019 3:08 pm

mark1gls wrote:
Mon Jan 21, 2019 11:20 am
Yes try new tyres and see if it's any closer as they will have more tread on them.
Update us when you have and tested the speedo. :good:
So, new set of Good Year's all round from All Tyres 365 - £26 each so think I may have robbed them, tracking sorted too and brake fluid changed at Bush tyres. The driving transformation is noticeable, and the steering wheel is spot on in the centre. For a change... gave Bush the steering geometry setup from the Haynes Manual as they didn't have the info.

Checked the GPS / speedo reading yesterday. A constant 4 mph low difference as you predicted instead of the 7-8 with the old tyres. Sorted!

Btw, just read your Skyrocket 50 article on the A reg 1.6 GL. Awesome, like looking at a carbon copy of JWC56Y! Great stuff, keep it coming...

Cheers

Russ



mark1gls
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Re: Original Spec Tyres for 13" rims

Post by mark1gls » Thu Jan 31, 2019 3:35 pm

That's a good price for the tyres, bet you wished you changed them earlier than 18 years ago... No need to risk old hard/cracked tyres at that price.. :-D


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
Membership No. 323

RussGLAuto
Posts: 36
Joined: Sat Jul 14, 2018 11:51 pm
fill in the right answer: 15
Location: Spalding

Re: Original Spec Tyres for 13" rims

Post by RussGLAuto » Thu Jan 31, 2019 3:46 pm

Yes, daylight robbery! Unfortunately what seems to happen when cars of any age change hands too frequently, between dealers especially, all try and get away with not changing the rubber.

Even had it on my 63 plate Volvo XC90 I bought last year. Worse still, the well known car supermarket I bought it from faked the MOT advisory that they should be changed to clear it without actually having them changed...

Got some hefty concessions off for pointing that one out to them!