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Author 20s on a 5 door Astra j
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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12th Jan 16 at 14:26   View User's Profile U2U Member Reply With Quote
I've been offered a set of 20s for my wheels plus some cash. I'm really tempted to go for them but I have a feeling they may rub as my car is lowered. (Unknown amount) does anyone have any experience or know if they would fit? The tyre size on my alloys are 235/45/18 , the 20s are 245/40/20.

Attached a few photos see what anyone thinks. Cheers
Wrighty_1988
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Registered: 30th Jun 06
Location: South Yorkshire
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12th Jan 16 at 14:47   View User's Profile U2U Member Reply With Quote
The height of your tyre on the 18 inch is 26.32 inches. The height on the 20 is 27.71 inches. Divide by two and hold the tape measure in the centre of the wheel on the car and sweep it like compass to see if it will fit.

Used this we site to work it out http://www.blackcircles.com/general/tyre-size-calculator
Wrighty_1988
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Registered: 30th Jun 06
Location: South Yorkshire
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12th Jan 16 at 14:54   View User's Profile U2U Member Reply With Quote
The new wheel will be 17.65 mm larger all the way round. Just from looking at the pics id say it would fit. Unless its much wider
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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12th Jan 16 at 15:11   View User's Profile U2U Member Reply With Quote
Cheers for the reply mate , Looking like they will fit then. Just the offset and width I'm concerned about now. My wheels are et46 the 20s are et41.
My wheels are 235 width and the 20s are 245.
I wonder....

[Edited on 12-01-2016 by Stuart H]
basslinecorsa
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Registered: 15th Jul 09
Location: Gravesend
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12th Jan 16 at 15:33   View Garage View User's Profile U2U Member Reply With Quote
with the measurements you gave the inside of the tyre will be in exactly the same place, just will be 10mm wider towards the wheel arch

math:

your wheels:
235mm wide = centre is 117.5mm + offset of 46mm means inside of tyre is 163.5mm from the wheel hub

new wheels:
245mm wide = centre is 122.5mm + offset of 41mm means inside of tyre is 163.5mm from the wheel hub

Project Scarlett - http://www.corsasport.co.uk/board/viewthread.php?tid=661417
Jambo
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Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
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12th Jan 16 at 16:08   View User's Profile U2U Member Reply With Quote
Love those wheels you have posted. They came in 19" on some editions of the J I believe.
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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12th Jan 16 at 16:26   View User's Profile U2U Member Reply With Quote
Correct they came in 19s on the 5 doors and 20s on the gtc model. Never seen a 5 door with 20s...
Wrighty_1988
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Registered: 30th Jun 06
Location: South Yorkshire
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12th Jan 16 at 17:07   View User's Profile U2U Member Reply With Quote
Get a thread up in Pic Day and someone nice might photoshop for you
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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12th Jan 16 at 17:36   View User's Profile U2U Member Reply With Quote
Already asked for a photoshop ages ago to change my current wheels to anthracite with no reply
Ian
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Registered: 28th Aug 99
Location: Liverpool
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12th Jan 16 at 18:15   View Garage View User's Profile U2U Member Reply With Quote
Make sure the fitment matches as there are two PCDs for the J, 5x105 and 5x115
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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12th Jan 16 at 18:49   View User's Profile U2U Member Reply With Quote
All gtc's are 5x115 apparently
MatthewR
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Registered: 21st Oct 02
Location: Rickmansworth
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13th Jan 16 at 12:45   View User's Profile U2U Member Reply With Quote
such nice wheels, would love them on my Astra
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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13th Jan 16 at 13:09   View User's Profile U2U Member Reply With Quote
Can't say I've seen a speed rating of u before
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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13th Jan 16 at 21:33   View User's Profile U2U Member Reply With Quote
Going down to test fit them tomorrow. Pretty confident they will fit with no rubbing just worried that the tyres will look too chunky.
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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14th Jan 16 at 16:29   View User's Profile U2U Member Reply With Quote
Don't fit tyres are hitting the bottom of the strut lol
Nic Barnes
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14th Jan 16 at 16:33   View User's Profile U2U Member Reply With Quote
They would look great. What size tyre is on them now? Will see what could work
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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14th Jan 16 at 16:59   View User's Profile U2U Member Reply With Quote
245/40/20 mate , thought they would fit
Nic Barnes
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Location: nowhere near ginger people
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14th Jan 16 at 17:10   View User's Profile U2U Member Reply With Quote
225/30/20 or a 235/30/20
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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14th Jan 16 at 17:11   View User's Profile U2U Member Reply With Quote
Sadly new tyres isn't an option they cost far too much lol plus these had basically brand new continental sport contact 5s on them
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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14th Jan 16 at 17:36   View User's Profile U2U Member Reply With Quote
They actually make the 18s look lost lol when you turned the wheel the tyre was catching the inner mud guard as well. Gutted
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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14th Jan 16 at 18:55   View User's Profile U2U Member Reply With Quote
Anyone fancy Photoshopping my wheels anthracite ? Please?
tom130691
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Registered: 13th Sep 08
Location: Daventry
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14th Jan 16 at 19:51   View Garage View User's Profile U2U Member Reply With Quote
spacers?
Stuart H
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Registered: 17th Jul 09
Location: lanark , scotland
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14th Jan 16 at 19:53   View User's Profile U2U Member Reply With Quote
Won't help them catching the inner arch though mate
--ToM--
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Registered: 23rd Nov 07
Location: Wirral
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14th Jan 16 at 20:14   View User's Profile U2U Member Reply With Quote
Yeah it wil l
--ToM--
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Registered: 23rd Nov 07
Location: Wirral
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14th Jan 16 at 20:14   View User's Profile U2U Member Reply With Quote
Sell they tyres and but smaller they look great them you have to make em fit haha

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