P38A NOW SORTED! Tyre sizes

Jon Dor · May 4, 2022

Just been offered an almost brand new set of 235 55 19 109 rated tyres. Since I got my P38 6years ago, I've generally run with 255 55 18 or 19's. Just wondering about potential issues with running 20mm narrower tyres. We're they an option when new? Looking forward to feedback of your experiences.
Kind regards,
Mike.

kermit_rr · May 4, 2022

Most important thing with tyres, make sure they're big enough to reach the ground

I think only 16 or 18 were standard options, 19s came with the L322, might be wrong
Do they fit your rims?

Jon Dor · May 4, 2022

Cheers Kermit. I think that - so far - all my tyres have reached the ground.
BUT... what I'm asking is have 235 width tyres been offered as an OE variant, as well as 255's I've always run with.
¦~]

Flossie · May 4, 2022

Only mentions 2 tyre sizes in the handbook , 16 and 18", both 255.

Jon Dor · May 4, 2022

Flossie said:
Only mentions 2 tyre sizes in the handbook , 16 and 18", both 255.

Many thanks. My handbook's diskappeared, but thanks for confirming that Flossie!
Mike.

300bhp/ton · May 4, 2022

Jon Dor said:
Just been offered an almost brand new set of 235 55 19 109 rated tyres. Since I got my P38 6years ago, I've generally run with 255 55 18 or 19's. Just wondering about potential issues with running 20mm narrower tyres. We're they an option when new? Looking forward to feedback of your experiences.
Kind regards,
Mike.

They aren't just 20mm narrower. The profile is a percentage of the width, so less width is also less sidewall and a shorter tyre. They'd probably fit, but you'd need to check the rim width specs for a 235/55R19 as they may require a narrower rim.

Jon Dor · May 4, 2022

300bhp/ton said:
They aren't just 20mm narrower. The profile is a percentage of the width, so less width is also less sidewall and a shorter tyre. They'd probably fit, but you'd need to check the rim width specs for a 235/55R19 as they may require a narrower rim.

Thanks very much.
I'll give them a miss. Hopefully the chart you've thoughtfully attached may help others too!
Mike

marjon · May 4, 2022

Jon Dor said:
Just been offered an almost brand new set of 235 55 19 109 rated tyres. Since I got my P38 6years ago, I've generally run with 255 55 18 or 19's. Just wondering about potential issues with running 20mm narrower tyres. We're they an option when new? Looking forward to feedback of your experiences.
Kind regards,
Mike.

Can we go back to basics.
What size rim do you run

do you have 2 sets of wheels?

Cos I is a little

how you would run 19s on 18 rims

or Vikki versus.

J

marjon · May 4, 2022

https://tiresize.com/tyre-size-calculator/

this 1

J

Jon Dor · May 4, 2022

marjon said:
Can we go back to basics.
What size rim do you run do you have 2 sets of wheels?

Cos I is a little how you would run 19s on 18 rims or Vikki versus.

J

I have 16's with Insa Special Tracks, two sets of 18's and a set of 19's.
No magic at this end :~}

kermit_rr · May 4, 2022

255/55R18 is very similar in diameter to 235/55R19 so wouldn't affect the speedo noticeably. Also similar to 255/65R16
The 19" is nearly an inch narrower than the 18"

Jon Dor · May 4, 2022

marjon said:
https://tiresize.com/tyre-size-calculator/

this 1

J

What an excellent tool!
Cheers, Marjon!
Mike

Jon Dor · May 4, 2022

kermit_rr said:
255/55R18 is very similar in diameter to 235/55R19 so wouldn't affect the speedo noticeably. Also similar to 255/65R16
The 19" is nearly an inch narrower than the 18"

Cheers! I ran out of fingies, fumbs and toesies trying to work that out matey!
Mike.

Enthusiastman · May 4, 2022

I still have a MINT brand new 100% refurbished full set of 5 Vogue SE five stud P38 alloys with 18 inch Goodyear Efficiency grip tyres on them for sale if anyone out there wants a BARGAIN. 1 tyre is brand new and the other 4 have at least 6mm on them. New centre caps on them also. They were always intended for my own P38 but that never came off as planned so still here for sale. Better than brand new they are and in correct landrover sparkle silver colour. Will also fit Landrover discovery models too.
Space needed.

Jon Dor · May 4, 2022

Enthusiastman said:
I still have a MINT brand new 100% refurbished full set of 5 Vogue SE five stud alloys with 18 inch Goodyear Efficiency grip tyres on them for sale if anyone out there wants a BARGAIN. 1 tyre is brand new and the other 4 have at least 6mm on them. New centre caps on them also. They were always intended for my own P38 but that never came off as planned so still here for sale. Better than brand new they are and in correct landrover sparkle silver colour. Will also fit Landrover discovery.
Space needed.

What size and £p?

Flossie · May 4, 2022

Jon Dor said:
What size and £p?

STOP IT!
you've got enough wheels!

Jon Dor · May 4, 2022

Flossie said:
STOP IT!
you've got enough wheels!

For the benefit of others matey..HONESTLY!

Datatek · May 4, 2022

Only 2 wheel sizes were ever homologated for the P38, 16" & 18", any other size is classed as a modification and you should inform your insurance company of the fact.

Scotiawhiskers · May 4, 2022

Datatek said:
Only 2 wheel sizes were ever homologated for the P38, 16" & 18", any other size is classed as a modification and you should inform your insurance company of the fact.

Plus the 275/45 R20's that Otto came on weighed around 28lb a corner more, ruined the handling and when he dropped onto the stops the wheelarches sat on the outer edge of the tyre, doing neither any good!

nigelbb · May 5, 2022

Jon Dor said:
Many thanks. My handbook's diskappeared, but thanks for confirming that Flossie!
Mike.

You can buy a new handbook from Amazon for £14. It's worth getting.

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