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Tyre sizes for Z650-B1

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mattc
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Tyre sizes for Z650-B1

#1 PostAuthor: mattc » Fri Feb 08, 2019 8:46 pm

Hi, anyone have a view on the max tyre (& rim) size you can get away with on a standard Z650-B1?

Standard front tyre is 3.25-19 and rim is 1.85x19
Standard rear tyre is 4.00-18 and rim is 2.15x18

Any thoughts welcome.

Thanks, Matt
Matt C
Z1000J2 / ZRX1200R / Z650B1 / GPz1170B1 x 2

MDM
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Re: Tyre sizes for Z650-B1

#2 PostAuthor: MDM » Tue Feb 12, 2019 1:17 pm

If you keep the standard rims, go for standard size tyres - there's no benefit in squeezing a wider tyre on, in fact you may find that it's detrimental.
If I remember correctly, it's possible to fit a 150 section tyre on a 17" rear wheel (something from an early ZX-6R or RGV say) into the standard swinging arm...
Z650/1100 turbo, GPz750 rolling resto, Z650 restomod

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mattc
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Re: Tyre sizes for Z650-B1

#3 PostAuthor: mattc » Tue Feb 12, 2019 1:39 pm

Thanks for that.....Matt
Matt C
Z1000J2 / ZRX1200R / Z650B1 / GPz1170B1 x 2

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Charlie
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Re: Tyre sizes for Z650-B1

#4 PostAuthor: Charlie » Tue Feb 12, 2019 4:20 pm

I have always run 100/90H-19 and 120/90Hx18 on my Z650's when using stock rims. I ran 'em back in the day and I ran them on my current bike prior to playing around with the front and back ends. There are no handling issues, and the tyres wear evenly.

I cannot see a rear tyre much bigger than the one on the SR (a 130/90 x 16) going in the stock swing arm. It is all quite snug in there.

You can fit wider tyres if you go with a Metmachex swingarm, but you would be going beyond the comfort limit of a stock rim. You would need to fit a wider rim to your hub.

In theory, and using a ruler - a Metmachex swingarm would take a 150 section (17") tyre (on the correct rim). In practice - a 140 is nearer the limit.

Been there, done it :)
Why do I persist in debating with idiots ? I really should know better :)

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mattc
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Re: Tyre sizes for Z650-B1

#5 PostAuthor: mattc » Mon Feb 18, 2019 12:01 pm

Thanks Charlie, good advice
Cheers
Matt
Matt C
Z1000J2 / ZRX1200R / Z650B1 / GPz1170B1 x 2


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