VXOC Astra-J/GTC
Tyres for 18" - Printable Version

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+--- Thread: Tyres for 18" (/showthread.php?tid=934)

Tyres for 18" - Lewis6317 - 13:th-Sep-2014

Ok so after talking with tucpal who said go for

225/40R18
Or
225/45R18 (better for speedmatch)

Now why is the 225/40R18 so much cheaper then the 45r18

I been on quick fit and i have read great reviews for arrowspeed at £72 each which is 225/40r18.
Yet if i want the 45r18 then im looking at 181 each for michelin :-/

I been using kwik fit for prices as they are mobile too at no extra cost.

Needing advise before i get my new alloys as could be more costly then I thought.


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Tyres for 18" - Cameron UK - 13:th-Sep-2014

I would have thought it would be the other way around? Lower profile more money! Someone will be able to clarify

Tyres for 18" - cornishtaz - 13:th-Sep-2014

You can't really compare Arrowspeed against Michelin you need to do like for like. I always buy my wheels from Camskill and get a local tyre fitter to fit.

Tyres for 18" - Lewis6317 - 13:th-Sep-2014

What do you think then baz? Go for the 40r18 or 45r18?


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Tyres for 18" - cornishtaz - 13:th-Sep-2014

Oe tyre size is 225/45

Tyres for 18" - Lewis6317 - 13:th-Sep-2014

the pricey ones then lol :(

Tyres for 18" - cornishtaz - 13:th-Sep-2014

Whats your current tyre size

Tyres for 18" - Lewis6317 - 13:th-Sep-2014

lol well before my current alloy it was 205/60r16 which was steelies but i now have 215/50r17 alloys

Tyres for 18" - cornishtaz - 13:th-Sep-2014

OE 16"s should be 205/60 17"s should be 215/50 and 18"s should be 225/45

Tyres for 18" - Lewis6317 - 13:th-Sep-2014

oh right ok, i will stick to your advise Smile

if i did go the 225/40 would it be bad idea and effect it allot?

also what rating should i be looking for as my 16's was h and the 17's are v

Tyres for 18" - tucpal - 13:th-Sep-2014

if your origanl tyres were 205. 60. r16. then you would need 225. 45. r18
this will keep the diameter that was 65.24cm and increase it to 65.97cm
and that is a good match so you speed error will be minimal
before with old tyres 30mph
with new tyre size 30.3mph

now if you old tyres were 205 60 17 that would be a different story
you would need 225 50 r18
so at 30mph your new speed would be 30.2mph

have a look at this lewis

https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0CD4QFjAE&url=http%3A%2F%2Fwww.kouki.co.uk%2Futilities%2Fvisual-tyre-size-calculator&ei=tLcUVJvwCfTy7AaHuIDoDQ&usg=AFQjCNHRRzKA_liA_flzK8ef_3v2NhiT6g&sig2=kd61eYo6-LZCdq6BjJuYcg&bvm=bv.75097201,d.ZGU


also you would have to compare the same brand tyres
as baz said you can not compare different brands for price

you could try maxxis

http://www.google.co.uk/aclk?sa=l&ai=CMuB-i7sUVIutJcWhygO2poHwC4XdtukGhYq8y4gBma7UjNEBCAkQASDezc8eKBBQ5_aKx_z_____AWC7zrWD0AqgAfPS79gDyAEHqQLAXersdqyUPqoEJ0_Q1EKzZU0CJsBk5nwKbVAA85Mh-VLyJkEN0bXZ1jOE7ntpTImRFsAFBaAGJoAH9ayQJ4gHAZAHAqgHpr4b4BKKi4fltsnm29wB&sig=AOD64_2CHEVUOL5tgg30W_eQplxKd7vIUg&ctype=5&rct=j&q=&ved=0CE4Q2CkwAA&adurl=http://www.oponeo.co.uk/tyre-details/maxxis-pro-r1-225-45-r18-95-w/%3Forigin%3Dprodlisting

as for speed rating you dont want anything under the max speed of the car

Tyres for 18" - Lewis6317 - 13:th-Sep-2014

No mate my old ones was was 205/60r16 mate not 17


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Tyres for 18" - tucpal - 13:th-Sep-2014

if you want to keep the tyre price down try the the maxxis

any tyre fitter will fit them for around £15 per tyre

Tyres for 18" - Rusty2009 - 13:th-Sep-2014

Check out this post for all size and speed & load ratings.

http://www.vxoc.org.uk/forum/Thread-Wheels-and-tyres


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Tyres for 18" - Lewis6317 - 3:rd-Jan-2015

right i know im digging up old dirt but after one of our member buying the reps i brought I have decided I will as well by the next trax event.

So I have been on the calculator http://www.tyretraders.com/Tyres_Calculator.aspx

now going from my old tyres which was standard on the car which where

205/60R16 H
Sidewall Height mm 123
Wheel RPM 785.19
Radius mm 326.2
Ratio Difference % -0.26
Speedo Reading 70MPH

Going to

215/45/r18
Sidewall Height mm 96.75
Wheel RPM 787.24
Radius mm 325.35
Ratio Difference % -0.85
Speedo Reading 69.82MPH

what you guys think?

Tyres for 18" - tucpal - 3:rd-Jan-2015

that is no big deal at all mate
they will look good the VXR reps
they will suit your car just fine Wink_1

Tyres for 18" - Lewis6317 - 3:rd-Jan-2015

yeah I can wait to get them now, need to do it at the right time though. lol other wise mrs will go mental lol

I would of got some 16" after market once but all ones i find are aboard so going with the reps now Smile

on a serious note, i wouldn't get any handling issues going up that big would i mate?

Tyres for 18" - Rusty2009 - 3:rd-Jan-2015

Mate if you are still wanting TPMS retrofitted get the sensors so they can be fitted in the wheels ready, you don't want to pay to have them fitted and re-balanced


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Tyres for 18" - Rusty2009 - 3:rd-Jan-2015

I went from 17 to 19 and find it a much car to drive a little less MPG but not fussed about that.


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Tyres for 18" - tucpal - 3:rd-Jan-2015

No mate the rolling radius is basically the same so no effect at all mate

Tyres for 18" - Lewis6317 - 3:rd-Jan-2015

Rusty2009 Wrote:Mate if you are still wanting TPMS retrofitted get the sensors so they can be fitted in the wheels ready, you don't want to pay to have them fitted and re-balanced

Need to get them yeah, they are very pricey though :(

tucpal Wrote:No mate the rolling radius is basically the same so no effect at all mate

cheers mate Smile

Tyres for 18" - tucpal - 3:rd-Jan-2015

here is a pic just to make you want them more Lol

[Image: m8cWXjotdJKqzvAtafTEryQ_zps7436a7d2.jpg]

Tyres for 18" - Lewis6317 - 3:rd-Jan-2015

hahahaha

Tyres for 18" - WhelanUK - 3:rd-Jan-2015

I've found similar ones but the inside of the wheel is painted black, look really good.

[ATTACH=CONFIG]274[/ATTACH]

Tyres for 18" - tucpal - 3:rd-Jan-2015

they do look much better in black agreed
they also really suit the 5 door.

Tyres for 18" - WhelanUK - 3:rd-Jan-2015

Only thing that puts me off is the centre caps.

Tyres for 18" - Lewis6317 - 4:th-Jan-2015

Whelan where did you find them mate?


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Tyres for 18" - WhelanUK - 4:th-Jan-2015

There on eBay but the PCD is 110 which is strange as wouldn't fit either engine.

http://pages.ebay.com/link/?nav=item.view&alt=web&id=251604548895

Tyres for 18" - Lewis6317 - 4:th-Jan-2015

That is strange :-/


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Tyres for 18" - WhelanUK - 4:th-Jan-2015

I'd give them a message, strange they selling alloys for the astra that wouldn't fit, maybe it's a typo.

Tyres for 18" - tucpal - 4:th-Jan-2015

the astra H was 5 110 so it will be for them mate