Triumphrat

Captain Jack

Hi guys, I have seen lots of posts on the forum(USA) about the dark side (car tyre on the rear) for the rocket III. Some say its fine others dont agree, I have seen one fitted over hear but my question is - is it legal over here? & how do the insurance companies view it?, also I would love to hear from anyone who's done it, how & where fitted does it handle ok especially on corners, what tyre & what pressure run at, in fact anything you feel important.

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Nickwiz

Why? Why put Car tyres that were designed for a completely different job on a motorcycle. Unless you are running a sidecar outfit don't.

Captain Jack

That is such a good qustion, in fact the same one that I asked myself. Thats why I've posted on the forum to try & find out about legalities & insurance issues over here. The only reason that I can think of is around cost, but reading the threads on this topic a lot of people in America seem to be having good results, some of them even claiming better handling than the round profile bike tyres. Of course different folks have different conditions & ride easy or hard.

__________________
A time & a place for everything, and it's here & it's now
The difference between try & Triumph is the UMPH you put into it

Raynewb

Don't think I would risk this. Manufactures put a lot of time and money into providing the right tyre for the bike. I am not an expert but I would think that there would be a few issues with insurance as the tyre must be rated for the potentional speed etc. I run Z rated tyres on all my bikes because they are designed for the speed and conditions of motorcyle riding. I am sure you would regret it.
Ray

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Ragman

Don't know about the legalities or insurance issues, but let me put it this way...

I've ridden behind chops fitted with car tyres on the rear, and it is a very scary thing to watch! Look at your car tyre, see how square it is in section. Now imagine the levels of grip and control you have at your disposal

Nah - I wouldn't do it. Certainly not on something like the Rocket III...

Flying Custard

It is legal but check insurance, the tyre being not for the purpose might have implications.
I've read the stuff and seen debates elsewhere. Unless you ride slowly and exclusivley on good roads, it seems plain daft. Save a few quid but for what other losses... There are reasons the tyre mfrs spend a couple of quid developing bike tyres .

For starters: tyre compound; profile; sidewall construction; lean angles; working temps. Why would anyone ignore those things, unless blinded by the idea of saving a couple of quid or wanting to make a noise on the net.

Captain Jack

Thanks guys, I'm not changing yet (New bike Sep. new tyres) cant see me going to the dark side when I do need them unless I find strong evidence of it being advantageous & I would have to big savings, but it was interest that drove me to post it.

__________________
A time & a place for everything, and it's here & it's now
The difference between try & Triumph is the UMPH you put into it

spank86

I would imagine the only time it might be a good idea is if you had a spare wheel for doing burnouts and didn't want to shred an expensive tyre.

I guess americans do it because they have to drive accross three states to find a corner. What with our roads we have to drive 3 counties just to find a decent straight.

PeteH

Exactly.....Spank you beat me to it