Hi all,
Always been a tad confused about the tyre size adjustments you are meant to make when running larger than standard wheels to keep the speedo correct so wondered if anyone could make a list for those fitting larger wheels and what tyres we need to run for clearance etc.
I have mk4 Astra sport 15" alloys and have 195/60/15 tyres on it, is this correct or will it through out my speedo reading???
Bigger Wheels / Tyres
Bigger Wheels / Tyres
Free Parking is a bonus, leaving my Cav in a carbon dust filled carpark is not.....
- Cavalier342
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Re: Bigger Wheels / Tyres
You know it's not correct dude, told you that ages ago Your speedo will be out anywhere around 15% now.
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China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE
Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
- planetc
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Re: Bigger Wheels / Tyres
Google 'tyre circumference calculator', there is probably several but I have used one that came up top of the results where you can put in the original size tyre and alternatives and it will tell you how much larger or smaller they are.
"No the temperature gauge doesn't work........
we've driven 150 miles today........
the heater went cold last Thursday........
they check the level when it's serviced don't they?"
we've driven 150 miles today........
the heater went cold last Thursday........
they check the level when it's serviced don't they?"
Re: Bigger Wheels / Tyres
Your under the assumption that the cav dials read right in the first place....
Re: Bigger Wheels / Tyres
Hmm I see, according to that I am 4.37% to large...lol...Speed difference +3.06 mph at 70mphplanetc wrote:Google 'tyre circumference calculator', there is probably several but I have used one that came up top of the results where you can put in the original size tyre and alternatives and it will tell you how much larger or smaller they are.
Closest I can get is 55 profiles which give a 0.97% and a speed difference of +0.68 mph at 70mph
Saying that though, I have never had a speed camera go off on me and I sit right on the speed limit through them
Used this: http://www.alloywheels.com/Tyre_Calculator
Free Parking is a bonus, leaving my Cav in a carbon dust filled carpark is not.....