Legal tire size

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mojoblues
Posts: 107
Joined: Sat Jan 26, 2013 7:26 am
Location: Croatia

Legal tire size

Postby mojoblues » Mon Nov 10, 2014 4:39 pm

Ok, I know similar question has been asked many times, but I can't find the right answer...
In user manual, size for the back tire is 4.50 H17. I can't find the exact size in metric size. In my papers it states the back tire is 130/80-18, and the friend with the same bike has 120/90-18.
Since I want to be road legal in Europe, I need to know what is the size that exactly corresponds to 4.50 H17. I tried to get the answer from the official Honda dealer in Croatia, but they were not helpful at all.
Also, is it possible that 4.50 H17 could be more than one size? All that I've found on the net is just confusing me even more...
'79 cb650z RC03

cb650
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Re: Legal tire size

Postby cb650 » Mon Nov 10, 2014 8:16 pm

130/90 17 is stock. I have seen 120/90 also. Depends whos chart you look at.
Did you clean the tank out?!?!?!?!

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Volker_P
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Re: Legal tire size

Postby Volker_P » Tue Nov 11, 2014 3:22 am

Fopr "street legal" I would say you need to use the size in your papers (130/80-18). According to http://www.conti-online.com/www/motorra ... ng_de.html, 120/90-18 like your friend has, would be the mose similar size compared to the stock inch size. Both seem no problem, yours is a bit wider and lower cross section.

As the US standard models have a 17inch rear rim while the European Z-model has a 18 inch rear rim, you won't be happy with a 4.50-17 tyre (or a metric equivalent) either as it won't fit on your rim! :wink:
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mojoblues
Posts: 107
Joined: Sat Jan 26, 2013 7:26 am
Location: Croatia

Re: Legal tire size

Postby mojoblues » Tue Nov 11, 2014 6:57 am

Problem is, even if I can fit 120/90-18, I need to have it written in my papers, and for that I need written confirmation from Honda dealership/official importer. Guy from Honda answered my mail this morning stating that official size is 3.75 H18 wich is 110/90-18!!! That would not fit, that is too slim! Plus, they want 50€ for written confirmation! :evil:
'79 cb650z RC03

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Volker_P
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Re: Legal tire size

Postby Volker_P » Wed Nov 12, 2014 2:00 am

Good to hear that they are that crazy on tyres not only in Germany. :roll:
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum


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