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Darkside-Dee

Member

Registered: 20th Jun 08
Location: Newcastle
User status: Offline

15th Sep 08 at 21:36

i just bought some Caeros off Joe-Tait and i checked to see what rubbers i would need so that the speedo wouldn't go out of sinc, done my research and apparently the only suitable one's i can get without knocking it out of sinc is 195/30/15's

are these the only ones i can get?

or is there other options i can get?

cheers

mattk

Member

Registered: 27th Feb 06
Location: St. Helens
User status: Offline

15th Sep 08 at 21:40

just put 195 / 45 / 15`s on

they will be fine

Tommy L

Member

Registered: 21st Aug 06
Location: Northampton Drives: Audi wagon
User status: Offline

15th Sep 08 at 21:40

um, i dont think you will want a 30 profile tire

Sean-B

Member

Registered: 1st May 07
Location: Wolverhampton Drives: 200SX S14a
User status: Offline

15th Sep 08 at 21:40

you will never ge tthat size tyre, just get 195/45/15s speedo wont be that bad

Matt L

Member

Registered: 17th Apr 06
User status: Offline

15th Sep 08 at 21:41

get 195/45/15's most common size, and tbf clocks are out anyway so changing your wheels by such an amount will make little difference.

i had 195/45/15 on mine and like i say the clocks over read by about 3mph which is what most are.

Darkside-Dee

Member

Registered: 20th Jun 08
Location: Newcastle
User status: Offline

15th Sep 08 at 21:42

ah right, does it make much of a difference to the speedo?

Matt L

Member

Registered: 17th Apr 06
User status: Offline

15th Sep 08 at 21:44

read my comment above

no real difference at all. not that its worth worrying about.

Darkside-Dee

Member

Registered: 20th Jun 08
Location: Newcastle
User status: Offline

15th Sep 08 at 21:45

ah right, i was typing that comment before i got it haha, cheers

good excuse for speeding if i get pulled over aswell =P

Ian

Site Administrator

Registered: 28th Aug 99
Location: Liverpool
User status: Offline

15th Sep 08 at 21:49

Your speedo under-reads as standard, legally they are allowed to by up to 10% so if you are indicating 70 you are actually travelling 63ish.

Larger wheels usually just decreases that margin a little, so you may be closer to actual speed. If you are worried, go out with a hand held sat nav and compare that with your clocks. It'll be close enough.

l15ter

Member

Registered: 1st Feb 08
Location: Berkshire
User status: Offline

15th Sep 08 at 22:10

is this a joke 195/30/15

where did you hear that from?

chloe16v

Member

Registered: 29th Nov 07
Location: Rotherham
User status: Offline

15th Sep 08 at 22:47

do u know every shop at trax was only selling 195/50/15's there may have been 1 or 2 tyres 195/45/15's around but not many

Darkside-Dee

Member

Registered: 20th Jun 08
Location: Newcastle
User status: Offline

16th Sep 08 at 13:35

http://www.autopartuk.com/tyrecalc.php

that tells you how much your speedo will be out by, and according to that the 195/30/15 are the closest. lol

DaveB

Member

Registered: 29th Dec 00
Location: Huddersfield
User status: Offline

16th Sep 08 at 13:42

quote:
Originally posted by cb87
do u know every shop at trax was only selling 195/50/15's there may have been 1 or 2 tyres 195/45/15's around but not many

What's that got to do with anything?

Ian

Site Administrator

Registered: 28th Aug 99
Location: Liverpool
User status: Offline

16th Sep 08 at 14:11

50s are cheaper.

Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

16th Sep 08 at 14:19

What size tyres do you have now?

Darkside-Dee

Member

Registered: 20th Jun 08
Location: Newcastle
User status: Offline

16th Sep 08 at 14:21

standard steelies on the car

just bought some cearos that have 195/60/15 which are like tractor wheels, there off a cav.

Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

16th Sep 08 at 15:14

What size steelies though, there's at least 2 different tyre sizes they could have...

Darkside-Dee

Member

Registered: 20th Jun 08
Location: Newcastle
User status: Offline

16th Sep 08 at 16:06

13" steelies with 145/80/13 on lol

Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

16th Sep 08 at 16:09

According to that link then, 195/45 15 are the closest...

Darkside-Dee

Member

Registered: 20th Jun 08
Location: Newcastle
User status: Offline

16th Sep 08 at 19:59

i know but i checked the lower ones first,

then when i asked on here i realised that 195/45 are the closest.

cheekyalex

Member

Registered: 5th Jan 06
Location: liverpool
User status: Offline

16th Sep 08 at 20:49

quote:
Originally posted by Ian
Your speedo under-reads as standard, legally they are allowed to by up to 10% so if you are indicating 70 you are actually travelling 63ish.

Larger wheels usually just decreases that margin a little, so you may be closer to actual speed. If you are worried, go out with a hand held sat nav and compare that with your clocks. It'll be close enough.

Just to back up your thoery a little

Ive got 185/55/15s that come with my wheels i only bought yesterday and on the motorway at 70mph the speedo was pretty much 100% the same as the sat nav reading

so id say the higher the profile the better for speedo accuracy.

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