spiderwebfx

^please please please with a cherry on top stop using sketchup and change to draftsight or solidworks

Justify reasoning and provide me with an alternative legal free option.  Sketchup was the easiest one I found to use when I went hunting.

I have only used Sketchup for printing photos with measurements to get things copied to scale, not to directly cut out/mill/whatever material

This is how the current drawing looks:

The 12.80mm measurement is generated from SketchUp itself.  Guessing that's just the exact of it.


Edit/
I'm heading off to bed now.  If you want files, they can be found here: http://spiderwebfx.co.nz/personal/

I'm just trialling this for the sake of doing it.  (I'm not an expert at all)

But is this what you're after?  The shape looks weird so I got no idea.

I can export it as a .skp file from Google SketchUp which most places should be able to read if it looks right.

My measurements are slightly different than the above image though ?  Specifically the second and fourth hole.  (looking counter-clockwise from the top)  If those two are 85mm apart, they can't be 42.5mm from the third hole.

This is also based on 21mm radius around centre of holes.

Add lube.

If they have no lube, this will make a huuuuggggeeee difference.

Don't use dish washing liquid either, it'll cause issues further down the track.

Can't do the lynx/hair spray thing with tubes.  It'll blow the tube to pieces.  Has it got any bead lube on it?  That'll make a huge difference.  I'm also wondering if the tubes are at a point where they won't stretch sideways anymore without blowing to pieces.

You may also find that being 185's, they may not be able to stretch any further.

You want to use chalk powder (unsure if that's the same as tel powder?).

Best way to apply it is to put the powder on the tube and then rub it around to give it a nice even coat, having too much inside the tyre will have a negative effect.  All you're trying to do is decrease the friction between tube and tyre/wheel to help it with seating.

Before you fit them, check for any tags inside the tyre, and make sure you peel the plastic layer off them if they have them.  Some tyres do, some tyres don't, but if they're there, they will wear through the tube.

When you're inflating, you need to pump them up, then let them down and pump them up again, this will help the tube distribute evenly inside the tyre.

I am interested in these widespread tubes, any chance you can find out what the size is?  I've never heard of them before.

Yeah that's true.

If you get a tape measure, you can guesstimate the height of it.  The 175/50's sidewall will be about 85mm high and the 175/60 will be about 105mm high.

Sweet as, just PM me when you know.

I can pick 'em up and store them for you.

I may even be able to get them down to Wellington if you were needing them sooner.

A539s are definitely my preferred choice, I noticed on the yokohama website they are also available in 175/60 so may also look into that but at this stage 175/50 would be the go.. Thanks for the advice

The 175/60R13's are definitely available.  I've got a customer running them on a mini-sprint stock car.  I believe they are rated up to 6" rims as well.

You should be able to buy 175/50R13 Yokohama A539's for around $140-$170 each including fitting.  As far as I can tell, they're are in stock.
I didn't get a chance to look into the Nankang's.

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.

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.
 

Just a quick look:

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.

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.

It will for a short period of time.

Standard  tubes are designed to go up round to suit the likes of a 185R14C commercial tyre.  When you start forcing them into an oval shape (such as a 185/55R14) you can't sections that are more stretched than others and because some of the rubber is thin, they will end up going flat.  You also can't have anything that the tube can get into and cause a puncture,

If you live near the ocean, you will also get corrosion on the inside of the wheel as it will be exposed to salt water vapor through the valve stem hole. (albeit this will be slow)

They're definitely available. I have them on my 1200 at the moment and will be getting them on the wheels I've just bought from leppa too (Got mine like 6yrs ages though) My workmate has been looking into trying to get the same as mine since he saw them, he mentioned he found them at a tyre place today though (cant remeber the name) but I can find out where it was if you want?

What are your ones?

Go to a tyre shop and ask if they have a near empty bottle of bead sealer and use that.

After doing more research, it is more than suitable for using to seal wheels.

175/50R13 have a maximum spec of 6" wide wheels.  There is no reason for the tyre shop to say it's not an option unless they just don't want to do it.

It's unlikely anyone will have them in stock, but they will be able to source them for you and will only take overnight/two days to get them there.  I also don't know who to recommend as the tyre shop I deal with in Christchurch is a commercial store so they generally don't deal with this sort of thing.


Yokohama and Nankang definitely do them, and I have no doubt there are a few other brands available in NZ.

I have a pair of S14 cusco top hats, I can double check the measurements on them.  If they're right, you can have the complete top hats for the freights cost.  Bearings are shot so they're of no use to me.

My S12 took about five and a half hours.  And that included modifying the headers slightly. 

Could you not use a toilet plunger and give it a pull?  I did this to a door on a ute, it didn't take the dent out completely but reduced it to about a quarter of it's original size.

Bolt two universal brackets together on each side.  

This could be an option:

Universal Brackets

Universal Bushes