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Kz1000 tyre size

Posted: Thu Dec 18, 2025 10:26 pm
Author: pegleg
Having the wheels rebuilt and wondering about increasing the width of rear. Has anyone done this to fit into a Metmachex swingarm. I realise that this means a new rim but best choice please allowing for chain run as well. Thanks.

Re: Kz1000 tyre size

Posted: Fri Dec 19, 2025 9:19 am
Author: zed1015
The widest rim you can fit to a stock 900/1000 frame without scalloping around the swingarm pivot for chain clearance is 5.5 inch with 180 tyre and you will need a 5/8ths offset front sprocket if going that wide..
I tend to use modern swingarms such as XJR1300 or GSXR etc in my builds so don't know the max width a Metmachex will accept..

Re: Kz1000 tyre size

Posted: Fri Dec 19, 2025 12:00 pm
Author: chrisNI
A 4.5 inch rim with a 160 looks plenty big on a Zed without going over the top. it also helps to have a 530 chain instead of a stock 630. Still need a sprocket offset.

Re: Kz1000 tyre size

Posted: Sat Dec 20, 2025 3:32 pm
Author: pegleg
Thanks chaps. So what would be the largest size , not using an offset sprocket. Sorry for silly questions.

Re: Kz1000 tyre size

Posted: Sun Dec 21, 2025 11:41 am
Author: Z1streetfighter71
I have a 150 on an aluminum 4.00/18 rim re-spoked onto the original hub with a zephyr 550 swing arm, there is good alignment with the front and rear sprockets and about 1cm of a clearance with the chain.
IMG_1360.jpeg

Re: Kz1000 tyre size

Posted: Sun Dec 21, 2025 2:08 pm
Author: Big Fluff
Yes I have to agree, I ran a 4.5" Akront rim with a 160 tyre, but I also matched it with a slightly larger width rim in the front too. Handles brilliantly too. Mind you it was a Moto-Martin :D