Tyre size markings?

Ribenapigeon · Super Spammer Joined: 20 Feb 2012 Karma :

My rear tyre says 140/70-17 M/C 66H
Front tyre 110/70 - 17 M/C 54H

What's that all mean?

Speed · Could Be A Chat Bot Joined: 19 Jul 2006 Karma :

https://www.v8register.net/articles/Tyre%20sidewall%20markings%20explained%20SF%20R9%2021.7.08.pdf

This link will help

Thumbs Up

supZ · World Chat Champion Joined: 03 Feb 2009 Karma :

Ribenapigeon · Super Spammer Joined: 20 Feb 2012 Karma :

Cheers really helpful tyre markings have always been a mystery to me.

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

And the dash means it's a crossply. That's important to know because if you have a crossply or bias belt on the rear, it would be illegal to fit a radial on the front. The other way round (radial rear, crossply front) is fine.

140/70 -17 is crossply.
140/70 R17 is radial.
140/70 B17 is bias belted.
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RidersRest · Nitrous Nuisance Joined: 15 Oct 2008 Karma :

here is another link to explain tyres etc https://www.pirelli.co.uk/en_GB/browser/attachments/pdf/MotorcycleTyresandYourSafety.pdf
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