Wheels?

[Deleted]

It defo takes a car tire on the back, I seemed to think it might have been a 195 tire, but RTR are saying that its the same all round so 205 rear tire is ample grip. I too thought it was not possible, but it must be.

I too am interested in what make the tire is and if there are any special requirements for seating the bead on the rim...

[vtR1k]

Well, I tried today. Went to the tiresupplier and just fitted a standard 205/40/17. And... leakage... There is obviously some difference in sealing shape between a motorcycle tire and a car tire, likely this will be the problem.
It can also be that the 2004 rim differs from the earlier model R1, or, another option, there can be a difference in tireshape of the different brands and types of car tires. Maybe the compound play a part in the story?
For now, if you just fit a Marangoni 205-40-17, this one is fitted on the demo model, then it must be good. A Yokohama should also fit, but I don't know the type.

[edit]
Maybe the use of an inner tube will bring the answer?

[latemarch]

There is supposedly a small difference in circumference between a bike wheel and car wheel. But that said I put a 195 Yokohama on mine and it sealed well and balanced up nicely.

Another poster on another site said this.....

Originally Posted by Alanstrike

Hi re rim sizes - Car spec 17inch rim has a "CODE" diam of 17 - which is a nominal diam - specified (real) diam is 436.58 and for MC rim nom 17" specified 433.32mm ie difference of 3mm diam between types - while a car tyre will fit the MC it is outside the diameter tolerance for tyres the max variance allowed for tyres is 3mm circumference what you need to do is build up the rim where the tyre sits by 1.6mm with a machinable epoxy (Devcon) after scouring surface and then machine back - this will ensure that the tyre sits correctly on rim for balance and safety - you don't want the tyre coming off - a good machinist could do this easily and would be worth the effort.
-alan

[vtR1k]

Ah, thats the trouble... Good to know!