The Triumph 2000 / 2500 / 2·5 Register Forum

Yep, we suspected it would be! It's a great long legged cruiser, but lacks a little punch off the line (towing is not so good either!) hence why I need a 3.7. I may change the tyres first to 60 profiles.


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Sorry, bit of a typo error. The diff I was thinking of swapping over is 3:45. I'm guessing this too will not be suitable. Maybe 3:7 will be a good compromise?

Hi Everyone, I am back and I need to update you, I took the minilites off today and put the old 175's back on with the steel wheels. I can not believe the difference, the car races along a 70-75. It is like a different car. The 195 55 r15's were obviously the cause here and I think the old narrow tyres seem to run far nicer. I wish I had put the old wheels on sooner. The car came with the minilites on. I just assumed they would be the same, because no one would create a dog by putting these on. I am sure with the right tyres on, things wouldn't have been a problem, but perhaps for someone else they will useful, because I ain't putting them back on. Jeff

Interesting. The difference in rolling radius between 195/55-R15 and 175/80-R13 is only 2.5%. I wouldn't have though that would have made that much difference in road performance.

The problem with using the 13" wheels is getting good tyres these days.

Cheers,
Mike.

Mike Stevens wrote:Interesting. The difference in rolling radius between 195/55-R15 and 175/80-R13 is only 2.5%. I wouldn't have though that would have made that much difference in road performance.

The problem with using the 13" wheels is getting good tyres these days.

Cheers,
Mike.

Well the wider the tyre the more grip. Grip equates also to resistance. It takes less engine power to accelerate a 13" than a 15". Bigger wheel diameters = good for constant motorway speeds, bad for constant stop/start motoring. Reverse logic for smaller wheels. Bigger wheels are more seductive I think on the majority of cars.

Kev