Thread: Please help me choose tyres for my 300tdi d1.

Originally Posted by dogman

Thanks that gives me a good idea. If I went to 225/75's could I get away with a 235/70 for a spare?

I would think that'd be easily close enough. At different times I've had 225/75 and 235/70 or 245/70 combined without issue.

225/75 KL71's it is. Thanks everybody for your thoughts.

We're not supposed to name and shame on here so I'll be diplomatic: if anyone is considering tyres from that well known manufacturer Hifly, particularly the at601's, I would think very carefully about that:-)

Originally Posted by dogman

225/75 KL71's it is. Thanks everybody for your thoughts.

We're not supposed to name and shame on here so I'll be diplomatic: if anyone is considering tyres from that well known manufacturer Hifly, particularly the at601's, I would think very carefully about that:-)

Are the 225/75 on the steel or alloy rims?

A photo when they are installed would be great. I have A/Ts on mine in the standard size. Wan't to keep it standard ish as I tow a van a bit and don't have much power to lose!

Originally Posted by gusthedog

Are the 225/75 on the steel or alloy rims?

Alloy. (That's the dark grey finish right?)

A photo when they are installed would be great.

Will do:-)

I have A/Ts on mine in the standard size. Wan't to keep it standard ish as I tow a van a bit and don't have much power to lose!

I can understand that. I feel the 300tdi is just about right for a 2000kg truck - any less power would be too little imo but I don't like shelling out at the pump either so it's like the porridge in the fairytale- just right:-)

What is the relationship between tyres and power anyway? Didn't do physics but I'm assuming if the force is spread over a greater area (wider tyres) you get less power to push forward?

I think put simply it requires more torque and power to move something bigger and heavier. So you go up a tyre size, you lose power.

I plan on towing with my new to me D1 so don't have any power to lose!

Also want to make sure the cooling system is in top nick. I'm going to swap to a light bar because the big old driving lights also block a fair amount of radiator area.

Originally Posted by gusthedog

A photo when they are installed would be great.

Better late than never - haven't been on the internet so much lately. I'm pretty happy with the kumhos. Very happy off road, on road they are ok though you do get more vibration.

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Originally Posted by dogman

I'm pretty happy with the kumhos. Very happy off road, on road they are ok though you do get more vibration.

For completeness the vibration I refer to there was caused by a rapidly disintegrating donut. The tires are at least ok on road, probably better than ok actually.

Ah, that'll do it!