 | Home > Wheels & Tyres > Standard steel wheels to modular steels? |
 
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3426   
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The J number is the width of the rim.
An important aspect that you should also be looking is the rim offset. This will state how far in or out your tyre will be in the wheel arch. Positive offset means it will sit more inside the arch than say a rim with 0 offset. Maybe this thread can inspire you. https://www.defender2.net/forum/topic55943.html 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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29th Jun 2022 3:54am |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324 
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If you buy modulars designed for Defenders then they'll fit your particular one. You'll need to decide on the width of the wheel that you want, determined by tyre choice, and the offset - the distance between the centreline of the wheel and the face of the hub.
Typical widths are 7", which match standard LR alloys, or 8" to give the option of wider tyres than standard. I think modulars go all the way to 10" wide, though. Standard LR alloys have an offset of +33 meaning that the centreline of the wheel is 33mm inboard of the face of the hub. Similar sized wheels with an offset of zero are common to 'fill the arches' and are essentially the same as fitting 30mm spacers. It all depends on the choice of tyres though, as the calculation changes for different widths. The bottom line then, is that there will be a modular to suit but you need to decide on the tyre size first. Darren 110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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29th Jun 2022 5:34am |
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| tgj2001 Member Since: 28 Jun 2022 Location: Shropshire Posts: 7  
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oh wow Anorak, this is more complicated than I first thought! I'm pretty happy to get hands on, elbow deep in sh*te and tackle the DIY jobs, but J numbers, PCD and offset frazzle my brain! What would a good A/T tyre width be?
As I'm on steels atm, what size could I comfortably go to before things start to rub? |
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29th Jun 2022 8:15am |
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| camelman Member Since: 27 Feb 2013 Location: Peak District Posts: 3373
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Go Large!!!
15x10 Modulars, ET-33 offset 
 Click image to enlarge |
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29th Jun 2022 8:50am |
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| tgj2001 Member Since: 28 Jun 2022 Location: Shropshire Posts: 7
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Wow camel, she's a beast! although the tyre roar must be deafening
What's the tyre size there? Tyler 1991 Defender 90 200TDI |
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29th Jun 2022 2:59pm |
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| camelman Member Since: 27 Feb 2013 Location: Peak District Posts: 3373
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They are 35x12.5x15. Tyre noise wasnt too bad as they were an AT pattern. Ive got similar sized MTs on now and they're a bit noisier but not.too bad
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29th Jun 2022 9:53pm |
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| markb110 Member Since: 22 May 2010 Location: Guildford Posts: 2644 
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Good excuse to upgrade the sound system…….
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30th Jun 2022 10:28am |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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Assuming you mean standard LR rims (not Wolf rims with the holes in them) then they're only 5.5 inches wide, which limits the size of tyre you can fit - in practice, they're only good for 7.50 x 16's. There are other sizes that will fit but they'll either be smaller (205's were factory fit on 90's in the early days) or an odd size that will throw out your speedo reading. There's nothing wrong with 7.50's - in many circumstances they'll perform better than other sizes as they tend to cut through mud to firmer ground beneath - but they're not going to give the look that you're after. If you go up to a 7" wide rim then it opens up other factory sizes that came in with the introduction of alloy wheels such as 235/85 and 265/75. The former is the de facto standard and the latter were an option on some 90's in the late '90's. 255/85 has also become a reasonably popular size as it's a bit taller but still fits on standard wheels. It only seems to be available in MT patterns though. None of these sizes will rub the arches but you may need to adjust the lock stops slightly to prevent rubbing on the radius arms, depending on the tyre width and wheel offset that you choose. Beyond that, you'd really need to go up to at least an 8" wide rim to fit some of the more exotic sizes. Darren 110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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2nd Jul 2022 9:21pm |
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