spiderwebfx Posted March 13, 2015 Share Posted March 13, 2015 So obviously there are a lot of questions regarding tyre size to rim size and the legality. Obviously we have the LVVTA list, but what about where the brand specification can override them? I'm looking at creating a list of the most popular size/brands/tread patterns that people use so that one can refer to it to see what tyre options they have for where the LVVTA list does not have the size, or the brand has better data. So I need the sizes and brands that you guys want to see on this list. Obviously I'm not going to put a 175/70R13 on it. I'm more looking for the lower stuff, 185/55R14, 175/50R13, 225/45R16 etc etc. I will include anything you ask for, if it's available and I can find data for it. Right this instant, I have access to these lists; LVVTA, FK452, ZE912, T1R, T1S, global Yokohama (all patterns), Michelin and I have a tonne more at work. (I do specialise in Michelin/BFGoodrich/Continental tyres so some specs will be harder to obtain than others) I suppose I should also ask the question, is a list such as this, worth doing? It will take a bit of time, but with the contacts I have through work, I should be able to source near on any brand for data. If I do this, I will NOT be including your rubbish brands, Triangle, Jinyu, Evergreen, Westlake, Enduro, Kellyetc etc can all go eat a fat one. If I have the time, I will also find out what, of these sizes are available in NZ in what patterns. Quote Link to comment Share on other sites More sharing options...
kyteler Posted March 13, 2015 Share Posted March 13, 2015 Definitely worth doing man. I appreciate the assistance you've already given me and I'm sure many more people who are looking to cert. with potentially silly sized tires and wheels would as well. 1 Quote Link to comment Share on other sites More sharing options...
kyteler Posted March 13, 2015 Share Posted March 13, 2015 I'm also sure Clint is sick of getting asked about tire sizes and would love to have a central reference point. Hah. 1 Quote Link to comment Share on other sites More sharing options...
cletus Posted March 13, 2015 Share Posted March 13, 2015 would be interesting to see what you can come up with, specially for smaller diameters (14, 15) Quote Link to comment Share on other sites More sharing options...
spiderwebfx Posted March 13, 2015 Author Share Posted March 13, 2015 Hmm. Just having a quick go through it now, it's border line a waste of time apart from the sizes the LVVTA chart is missing. (This is looking mainly at 13's, 14's 15's)The only real exceptions to the rules are the FK452 and ZE912 Falkens. Quote Link to comment Share on other sites More sharing options...
spiderwebfx Posted March 13, 2015 Author Share Posted March 13, 2015 Just a quick look: 1 Quote Link to comment Share on other sites More sharing options...
sheepers Posted March 13, 2015 Share Posted March 13, 2015 so, 15x9? what tires are you supposed to run on those except for 275 70's? Quote Link to comment Share on other sites More sharing options...
spiderwebfx Posted March 13, 2015 Author Share Posted March 13, 2015 In New Zealand there isn't a legal option. I've looked into 245/40R15 Avon's before, but they are stupidly priced as they aren't stocked here and have to be air freighted. They're suitable for 8.0-10.0" wheels. I got quoted $480 each last time I enquired. As far as I know it's the only road legal tyre you can get thats suitable while still being low profile. You can also get 225/45R15 but I've only seen them spec'd up to 8.5". I'm going to pop into work shortly and do a few quick checks on some tyre sizes and their availability. Quote Link to comment Share on other sites More sharing options...
Firebrand Posted March 14, 2015 Share Posted March 14, 2015 It seems ridiculous to me that you can't put a 225 wide tyre on a 15 x 9 Rim (considering the tread is almost 9 inches wide so the tyre barely even needs to stretch to fit the rim). But you can legally put it on a 15 x 6 rim, which means it has to tuck in by well more than an inch on each side. It's like they just made up some numbers and then no one can be bothered changing them. 1 Quote Link to comment Share on other sites More sharing options...
spiderwebfx Posted March 14, 2015 Author Share Posted March 14, 2015 It seems ridiculous to me that you can't put a 225 wide tyre on a 15 x 9 Rim (considering the tread is almost 9 inches wide so the tyre barely even needs to stretch to fit the rim). But you can legally put it on a 15 x 6 rim, which means it has to tuck in by well more than an inch on each side. It's like they just made up some numbers and then no one can be bothered changing them. A tyre's sidewall has a shit tonne less stress on it when they're angled inwards then when they're angled outwards. When they're in, you've got available movement both ways on a horizontal axis. When they're stretched out, the only available movement is inwards which means your two sidewalls are actually fighting each other. (When one sidewall goes in, the other needs to go out, which it can't do properly.) The LVVTA guidelines actually do a good job of covering the basic guidelines of what the MANUFACTURER's have said are safe, not what they've made up themselves. Just one example we got through work is 245/35R19 Achilles ATR Sport's. They're only supposed to go up to a 9.5" wheel. I have one customer who had a set put on by another tyre shop on some 10" wide rims (tyre shop said they'd be fine). After three weeks, all four of them were pulled off because of cracking on the inside sidewalls. Oh and no warranties because they were fitted to rim's outside of manufacturers spec. As much as these rules do suck, they are there for a reason. 4 Quote Link to comment Share on other sites More sharing options...
Firebrand Posted March 14, 2015 Share Posted March 14, 2015 Cheers for taking the time to explain that Im all for rules if there is sound science backing them up. 1 Quote Link to comment Share on other sites More sharing options...
Testament Posted March 15, 2015 Share Posted March 15, 2015 Its also a different kettle of fish on a big rim small sidewall to a small rim big sidewall tyre. 1 Quote Link to comment Share on other sites More sharing options...
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