Max tyre width on 16" blitz rims

[harrygrey382]

Just wondering what the widest tyre you can fit onto the original 16" two piece blitz/CMP rims is? Can you get 12.5" wides on?

[Lang]

Harry,

You can get just about anything on the rims if you are only operating at low speed off road. Once you start on the road or on the beach or anywhere with low pressures you run the risk of rolling them off the 6 1/2 inch rims.

Modern radial tyres require wide base rims whereas old style tyres required much narrower rims for the same sidewall width. According to the Tyre and Rim Association handbook (the legal standard manual for all Australian states) a 305 width modern tyre has a minimum 8 inch rim up to 9 1/2 while a 315 width has 8 1/2 up to 10 inch rim requirement.

If you want to stay legal you will not find a modern radial tyre as wide, let alone wider, than the original 9.00x16 that can use the blitz rims. I think best you can do is 8.25x16 equivilent which is narrower than what you started with.

Lang

[jack neville]

I put 10.50x 16 on my Fordson

[harrygrey382]

But that means a C30 or F30 in original trim would be illegal? Or were the rims for 10.50x16 bigger? Ideally I want to put 10.50x16s on but finding them for an affordable price doesn't seem like it'll ever happen!

[Lang]

Harry,

There are two possibilites.

The rims on the bigger blitz were wider but more likely the 10.50x16 were legal on the standard rim. As I said above, the old type tyres were MUCH narrower across the bead and could take narrower rims legally. If you can find 10.50x16 (the only place I know of is Wallace Wade in USA- $311 each) you would be OK but if you are putting modern tyres on you are outside the box.

Lang

[harrygrey382]

so the 30cwts had a different 16" rim to the 15cwts? Also how could a 10.50x16 be legal but a metric tyre 10.5" wide not be? Man getting tyres for a blitz has to be the hardest job of all

[jack neville]

They are easy to get. But they aren't cheap.

[Lang]

Harry,

I suspect the 16 inch wheels were all the same.

If you read my explanations above you will see that the old tyres had a narrow section across the beads and fitted on narrow wheels. The sidewalls bulged out and they called them balloon tyres.

The modern tyres are wider across the beads for the same sidewall width as the old size and require wider wheels.

A 7.50X16 inch old tyre will fit a 5 1/2 inch wide rim legally. A 205 R 16 modern tyre of the same sidewall width will need a 6 1/2 inch rim.

Lang

[Ganmain Tony]

Robert Pearce has fitted an off the shelf road tyre to his C15A. Their rolling diameter is small, but hey! theyre black and round and keep your truck off the ground.

Robert where are you?

Have a look at Identification of F15 2wd thread. I fitted the tyres Jack is talking about to my F15. Same 16 inch rim as all other blitz trucks including yours.

[hrpearce]

The Tyres I fitted are 31 x 10.50 R 16.5 LT, B F Goodrich Radial Mud- Terrain T/A.
As to where was I, at the time you posted Tony I was still riding a bike around Betty's fences fixing roo damage.

[harrygrey382]

the smaller tyres may be a very practical approach, but I'm kind of after something that looks great... Which IMO are bigger tyres! I can always stick some 7.50s on it, but the ratty (including one bald original) 9.00-16s on it hold air so at least I can drive it on them.

Originally Posted by Lang

Harry,

I suspect the 16 inch wheels were all the same.

If you read my explanations above you will see that the old tyres had a narrow section across the beads and fitted on narrow wheels. The sidewalls bulged out and they called them balloon tyres.

The modern tyres are wider across the beads for the same sidewall width as the old size and require wider wheels.

A 7.50X16 inch old tyre will fit a 5 1/2 inch wide rim legally. A 205 R 16 modern tyre of the same sidewall width will need a 6 1/2 inch rim.

Lang

yeah you're right I didn't read your reply properly, I didn't realise older tyres spec'd a narrower bead cf overall width. So has anyone been quoted a better price than $500 for the Mitas 10.50x16s?

[Shane]

Hello all.
Here are some pictures of my tyres for the cab 12. Not bad for $800 was over the moon when i got these just another small part of the project but i cant wait to put on the girls feet.






A big thanks to Hugh for getting these for me, Hugh and Colin have been a bloody great help with my restoration without people like this i wouldnt have a chance so cheers lads