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Offline benbenukuk

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« on: March 26, 2007, 16:02:46 »
hi All, I Am Thinking Of Getting New tyres And Would Like To Get 235/85x16 At The Moment I Have 7.50x16 Will The New tyres Be Bigger? Many thanks.  Ben
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Offline S188

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« Reply #1 on: March 26, 2007, 18:01:39 »
Yes they will.
Not by much but I think there could be about an inch in it (dia).  7.50s are around 31in, 235/85s are nearly 32 BUT they all vary slightly between makes so its no exact science, especally if the old 7.50s are worn.

I wouldn't worry about the speedo calibration changing, asuming it was accurate in the first place.
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Offline ian_s

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« Reply #2 on: March 26, 2007, 22:02:53 »
my 7.50R16 michelins are the same height as my 235*85r16 goodyears
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Offline Jim-Willy

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« Reply #3 on: March 27, 2007, 00:01:36 »
A fair bit wider but not much if any height difference.  Check your rims are wide enough for the 235's too........
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Offline Bob Ajob

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« Reply #4 on: March 28, 2007, 15:52:15 »
As Jim-willy says, check the rims.

Your 750s will most likely be on 5.5" rims, the 235s I'm sure should be on wider rims like 6.5", though I can't lay my hands on that info at the moment.
Anyone know how wider Defender rims are?

What vehicle you got? For some you may have to alter the bump stops or the tyres will rub on the insides.
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Offline Jim-Willy

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« Reply #5 on: March 28, 2007, 16:39:39 »
I has 235's on 5.5" rims and they looked pinched i wouldn't have been happy airing them down so i put them on 6.5" and now seem fine......
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Offline Rich_P

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« Reply #6 on: March 28, 2007, 16:52:19 »
Quote from: "Bob Ajob"
Anyone know how wider Defender rims are?
110 ones are 5.5" just like Series LWB rims.
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Offline Bob Ajob

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« Reply #7 on: March 28, 2007, 18:45:18 »
235/85R16 by calculation would be 31 3/4" (ish)m so I wouldn't worry about recalibrating your speedo.

235 tyres have 9.25" wide tread, almost 2" wider tread than 750s which have 7.5" wide tread. I would check with the manufacturer of the tyres to see what rim width is recommend for the tyres for safety reasons.

Too narrow a rim could lead to the tyres wearing badly, unevenly, instability at any speeds especially when cornering, or at worse could cause the tyre to come off the rim or a blowout.

A lot of tyre suppliers that advertise in Landrover mags actually advertise their tyres already on rims, perhaps for this reason.
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Offline James.Harwood

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« Reply #8 on: April 02, 2007, 19:14:54 »
Ben

Have you got a 88" or 109"

on the 88" the 235 85 will require a larger rim (6.5" from memory at least)from standard and is about the biggest you can go for.  Do not make the mistake of getting 235 70 16 tyres, you will ground out on a speed hump.

If you have a 109" you could go up to the 265 75 tyres, but make sure you have a salsbury rear axle.  You would need 7.5" rims at least
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