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Touring tyre tread depth - New

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Blue_SV650S
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PostPosted: 20:53 - 04 Dec 2009    Post subject: Touring tyre tread depth - New Reply with quote
I generally buy 2nd hand tyres, as such I actually have no idea how deep the tread is on a new tyre Embarassed

A few adds I am looking at state the remaining tread depth, but as I have no idea how deep it is when new, I can't really tell if they are 1% worn or 70% worn!! Very Happy

So in MM what is a new touring tyres tread depth?!!? Thinking
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LeeR
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PostPosted: 22:15 - 04 Dec 2009    Post subject: Reply with quote
I think if I remember rightly that when I bought Bridgestone Battlax BT020/021 tyres last year the BT020 front was 4.5mm from new and the BT021 rear 5 or 6mm.

Suzuki recommend changing the rear at 2mm and the front at 1.6mm, but the legal UK minimum is 1mm front/rear.

The tyres lasted around 6,000 miles so if you know what it's got left subtract the manufacturer's or legal minimum and you'll know if they're worth buying.
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oldbiker
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PostPosted: 13:06 - 05 Dec 2009    Post subject: Reply with quote
LeeR wrote:
I think if I remember rightly that when I bought Bridgestone Battlax BT020/021 tyres last year the BT020 front was 4.5mm from new and the BT021 rear 5 or 6mm.

Suzuki recommend changing the rear at 2mm and the front at 1.6mm, but the legal UK minimum is 1mm front/rear.

.


I might be wrong but I think the legal minimum is 1mm at any point of the tyre or 1.6mm over 70% of the width of the tyre.

All tyres now have tread depth indicators at the point where the tread meets the side wall (if you look closely you will find them).

The minimum recommended tread depth is 3mm, this is the safe limit not the legal limit

here are two links to a post that I put on another site,
these posts just tell you what all the letters and numbers on the tyres mean

https://scooterotica.org/tempforum/viewtopic.php?f=6&t=3769&p=26559&hilit=tyre+specs#p26559

https://scooterotica.org/tempforum/viewtopic.php?f=6&t=3770&p=26560&hilit=tyre+specs#p26560
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Howling TerrorOutOfOffice
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PostPosted: 15:57 - 05 Dec 2009    Post subject: Reply with quote
BT45 rear 5mm when new.



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LeeR
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PostPosted: 19:23 - 05 Dec 2009    Post subject: Reply with quote
tzr.steve wrote:
I might be wrong but I think the legal minimum is 1mm at any point of the tyre or 1.6mm over 70% of the width of the tyre.


It's 1.6mm for a car tyre and 1mm for a motorcycle tyre (over 75% of the width), and mopeds merely need visible tread.

Quote:
Cars, light vans and light trailers MUST have a tread depth of at least 1.6 mm across the central three-quarters of the breadth of the tread and around the entire circumference.

Motorcycles, large vehicles and passenger-carrying vehicles MUST have a tread depth of at least 1 mm across three-quarters of the breadth of the tread and in a continuous band around the entire circumference.

Mopeds should have visible tread.


Source Direct Gov - Vehicle maintenance, safety and security
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neatbik
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PostPosted: 19:55 - 05 Dec 2009    Post subject: Reply with quote
Yep, 1mm for a bike, 1.6mm for a car. Thumbs Up
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iooi
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PostPosted: 09:53 - 06 Dec 2009    Post subject: Reply with quote
tzr.steve wrote:
The minimum recommended tread depth is 3mm, this is the safe limit not the legal limit



I wonder who came up with this figure......

At a guess the manufacture. So if a tyre has 6 m/m of tread new then you can only use 50% of it.....
Nice selling feature.
So if you get 5K out of a tyre going to the legal limit you will only be able to get 3K before its deamed unsafe in their eyes.......
Mmm, nice increase in sale there.... Only a marketing person will have dreamed up that idea Laughing

I guess they will argue that its to do with the amount of water it can displace.

Perhaps they should then look at the design. So that a tyre performs safely down to the legal limits.
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oldbiker
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PostPosted: 20:42 - 06 Dec 2009    Post subject: Reply with quote
Quote:
It's 1.6mm for a car tyre and 1mm for a motorcycle tyre (over 75% of the width), and mopeds merely need visible tread.

Source Direct Gov - Vehicle maintenance, safety and security


I stand corrected,
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Old Thread Alert!

The last post was made 16 years, 302 days ago. Instead of replying here, would creating a new thread be more useful?
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