mudmuncher Posted February 2, 2009 Share Posted February 2, 2009 Hi all I have a series 3 with a 2" lift and standard arches i am running 235/85 16 at the moment with no problems. My question is can i run 31/10.50 x 15 or will i get running problems ?? Also i am not great on tyre sizes are 31/10.50 x 15 much bigger than the 235/85 16 ??? Many thanks chris Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted February 2, 2009 Share Posted February 2, 2009 235/85x16 is approximately 31.5in in diameter so is actually slightly taller than the 31/10.5x15. A 235 tyre is 235mm wide where as the 10.5 is approx 265mm wide . Hope this helps Pete. Quote Link to comment Share on other sites More sharing options...
sotal Posted February 5, 2009 Share Posted February 5, 2009 Don't forget how much tyres can vary in size as well. I've seen two lots of 235/85/16's side by side one set was about an inch taller and an inch wider than the other set. So some people have no problems fitting 235's wheras other get problems. I have a similar setup to you. Series 2A 2" Lift Std Arches, and I have 235/85/16 MT's on which are large for 235's and I wouldn't want to go any bigger - I've already lost some steering lock and my back wheels rub on the inside of the arch on full articulation Quote Link to comment Share on other sites More sharing options...
pikefly Posted February 5, 2009 Share Posted February 5, 2009 Hi all I have a series 3 with a 2" lift and standard arches i am running 235/85 16 at the moment with no problems. My question is can i run 31/10.50 x 15 or will i get running problems ?? Also i am not great on tyre sizes are 31/10.50 x 15 much bigger than the 235/85 16 ??? Many thanks chris Don't forget that with the larger tyres you might need to strengthen the half shafts or you will "wind up the diff". pikefly Quote Link to comment Share on other sites More sharing options...
zeroland Posted February 5, 2009 Share Posted February 5, 2009 Take a look at the following site which gives you the option of calculating different tyres and the % speed difference: http://www.carbibles.com/tyre_bible_pg2.html My Series only has 205/70/16 So I can't even clear a muddy rut... Quote Link to comment Share on other sites More sharing options...
missingsid Posted February 7, 2009 Share Posted February 7, 2009 Take a look at the following site which gives you the option of calculating different tyres and the % speed difference:http://www.carbibles.com/tyre_bible_pg2.html My Series only has 205/70/16 So I can't even clear a muddy rut... Great find, however not totally reliable since his comment on Motorcycle speedos would make all motorcycles illegal in the UK due to construction and use regs! Marc. Quote Link to comment Share on other sites More sharing options...
bigj0nny Posted May 12, 2009 Share Posted May 12, 2009 I have a similar query relating to tyre size. I have a 1981 Series 3 109" Safari, currently on 265/75/16 on white 8 spokes, with standard leaf springs. I also have a set of 1 Ton rims, that I'd like to put 9.00 x 16 / 255 x 16 tyres on and fit to the Safari. I know the 1 Tons had extended spring hangers / dumb irons and different (ENV) axles, but does anyone know if I would have any problems with this wheel tyre combo on my otherwise standard 109 LWB? I don't know the offset of the 1 Ton rim, but I reckon the 900 x 16 tyre is only about 3 inches taller than the tyres currently fitted. I'm afraid to lift it, as I understand it causes problems with the prop shaft articulation and / or axle rotation? Any advice greatfully received! Jon Quote Link to comment Share on other sites More sharing options...
Mike Posted May 17, 2009 Share Posted May 17, 2009 The 1 ton rims have the extra width - 1" on the outside of the rim. 9,.00 will loose steering lock, should be alright with 235's, might even be able to turn the lock stops in a bit and improve the turning circle. used to run 1 ton rims when I trialed a series. wouldn't go for the 9.00's though too tall, 1 tons had a different transfer ratio I think. Quote Link to comment Share on other sites More sharing options...
ian_s Posted May 18, 2009 Share Posted May 18, 2009 Great find, however not totally reliable since his comment on Motorcycle speedos would make all motorcycles illegal in the UK due to construction and use regs!Marc. almost every 'modern' car i have driven has been well over 5% out, so its not just motorbikes. this is according to my various GPS devices. the most accurate speedo i had is in my series 3 at the mo i did quite a lot of testing with this too, I went out with a garmin satnav, a tomtom go, and my dell PDA with tomtom and memory map installed the 3 different GPSs all read within 1mph at 70, but the speedo was reading 76 this was in a 2003 Seat Ibiza. the pool cars i use at work are the same, and so is my pug 405 Quote Link to comment Share on other sites More sharing options...
HoggyN Posted May 18, 2009 Share Posted May 18, 2009 Great find, however not totally reliable since his comment on Motorcycle speedos would make all motorcycles illegal in the UK due to construction and use regs How come? If I remember correctly, vehicle construction and use regulations require vehicle speedometer accuracy to be in the range of -0->+10%, so over reading within these limits is legal. Quote Link to comment Share on other sites More sharing options...
discomikey Posted May 18, 2009 Share Posted May 18, 2009 again, tyre sizes are not all the same, my disco had 235/10s on it when it came to my posession, i swapped these for some insa turbos of the apparent same size, they were about an inch taller and 1/2 an inch wider, which is why i had to adjust the arches slightly. Quote Link to comment Share on other sites More sharing options...
Cheesy Posted May 19, 2009 Share Posted May 19, 2009 It depends on the wheel offset as well, Ive got miss matched wheels front to back with 31x10.5x15s, the fronts are in the arches and dont rub on anything, the rears stick out 30mm each side, they also dont rub. The old 750-16 SATs that I used to have on it broke all of the supports off the bottom of the seats in the tub.... Quote Link to comment Share on other sites More sharing options...
Rich_P Posted May 19, 2009 Share Posted May 19, 2009 The old 750-16 SATs that I used to have on it broke all of the supports off the bottom of the seats in the tub.... Those rims you're running must really be wide. Quote Link to comment Share on other sites More sharing options...
Cheesy Posted May 21, 2009 Share Posted May 21, 2009 Those rims you're running must really be wide. No standard LR rims, from memory I think the 750-16s were about 33 inch, it was the top of the tyres that rubbed on the bottom of side seat part of the tub. The springs in it are not original (dont know what they are from) and it seems to articulate a lot more at the back than other 88 SIIs Ive seen (that dont use parabolics edit ah probably should have written 7.5-16.... Quote Link to comment Share on other sites More sharing options...
Gazzar Posted May 21, 2009 Share Posted May 21, 2009 No standard LR rims, from memory I think the 750-16s were about 33 inch, it was the top of the tyres that rubbed on the bottom of side seat part of the tub. The springs in it are not original (dont know what they are from) and it seems to articulate a lot more at the back than other 88 SIIs Ive seen (that dont use parabolicsedit ah probably should have written 7.5-16.... I understood! Anyway it only goes to show that tyre manufacturers don't all use the same tape measure, except when it comes to rim size. One interesting thing, when I was getting new tyres last year (avon range masters 7.50 R 16) the tyre fitter measured the width of the rim, (a standard 5.5 x 16 LR LWB rim), with a standard rim width gauge and found that they were actually 6 inches. Which gives one a little more leaway when choosing tyres. As many modern 16" tubeless tyres require a minimum of 6" rim. G. Quote Link to comment Share on other sites More sharing options...
Rich_P Posted May 21, 2009 Share Posted May 21, 2009 No standard LR rims, from memory I think the 750-16s were about 33 inch, it was the top of the tyres that rubbed on the bottom of side seat part of the tub. The springs in it are not original (dont know what they are from) and it seems to articulate a lot more at the back than other 88 SIIs Ive seen (that dont use parabolics I've only managed to get my 7.50s rubbing on the tub when cross axled once or twice. I have heard of stories of people fitting transit springs to Series vehicles in the past too. Maybe that's along the lines of what a previous owner has done on your motor? Quote Link to comment Share on other sites More sharing options...
Cheesy Posted May 21, 2009 Share Posted May 21, 2009 I've only managed to get my 7.50s rubbing on the tub when cross axled once or twice. I have heard of stories of people fitting transit springs to Series vehicles in the past too. Maybe that's along the lines of what a previous owner has done on your motor? Thats possible but it is in NZ and was put together out of bits, I think they are probably LR parts but just not off an 88. It used to get cross axled all the time, how else do you show up much newer jap stuff!! It sits about 80mm higher than a standard SII 88 but not quite as high as a skippy Quote Link to comment Share on other sites More sharing options...
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