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Tyre tread depth question

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Faraz
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PostPosted: 18:06 - 17 Dec 2008    Post subject: Tyre tread depth question Reply with quote

Quote:
The legal limit of tyre tread depth in the UK for motorcycles
over 50cc is 1mm across 3/4 of the width of the tread pattern
and with visible tread on the remaining 1/4. For motorcycles
up to 50cc the law requires that all the grooves of the
original tread pattern must be clearly visible.
The legal
requirements may differ in other countries.



True?
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Keir
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PostPosted: 18:19 - 17 Dec 2008    Post subject: Reply with quote

why wouldnt it be?! Laughing
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Faraz
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PostPosted: 18:23 - 17 Dec 2008    Post subject: Reply with quote

Keir_K3 wrote:
why wouldnt it be?! Laughing


I dont know, it doest seem right. No measurement or anything.
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ZaphodBeeble
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PostPosted: 18:43 - 17 Dec 2008    Post subject: Reply with quote

VOSA MoT manual wrote:

Where the engine capacity is not greater than 50cc, tread depth may be less than 1mm, if the tread pattern is clearly visible around the entire circumference and across the whole breadth of the tread.


So there you have it...
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chris1-4-7
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PostPosted: 20:12 - 17 Dec 2008    Post subject: Reply with quote

yep that is correct ^^ only visible on a moped
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Noxious89123
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PostPosted: 00:27 - 18 Dec 2008    Post subject: Reply with quote

BUT, just because it's legal, doesn't mean that you should ride on almost bald tyres. Tread depth has a big effect on stopping distance in the wet.
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Faraz
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PostPosted: 00:31 - 18 Dec 2008    Post subject: Reply with quote

Noxious89123 wrote:
BUT, just because it's legal, doesn't mean that you should ride on almost bald tyres. Tread depth has a big effect on stopping distance in the wet.


Yeah i wouldnt anyway, its a long story.

See my "Hit and run" thread. My tyre is fairly low in some bits of the tyre, wasnt sure if the insurance comp would not pay out because of that.
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bikedemon99
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PostPosted: 00:32 - 18 Dec 2008    Post subject: Reply with quote

Tread depth plays a big part especially when going round r,bouts in the wet even at the slightest tilt speaks one with experience, ouch!
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ZaphodBeeble
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PostPosted: 01:06 - 18 Dec 2008    Post subject: Reply with quote

To be honest I don't think the tread depth is too important until you hit deeper water. If it's just light rain on the road surface then there isn't any water to displace into the treads. I think the worst thing about a tyre with very little tread is the quality of the rubber at the end of the tyre's life which is why an almost bald tyre can still be quite dangerous in the dry and especially when cold.
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colin1
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PostPosted: 03:09 - 18 Dec 2008    Post subject: Reply with quote

I think the worst thing about a worn tyre is that it will be squared off making leaning the bike a bit more tricky
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ZaphodBeeble
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PostPosted: 09:14 - 18 Dec 2008    Post subject: Reply with quote

colin1 wrote:
I think the worst thing about a worn tyre is that it will be squared off making leaning the bike a bit more tricky


That's not really a safety issue though; just makes the bike harder to steer. Although I suppose there is a narrow point of the tyre, two in fact, on either side of the square patch as you lean. That could be an issue. Hmm. Squared-off tyres FTL. But then again if you don't ride your bike hard enough to ever lean further than the square patch which you have worn with your lack of cornering then don't worry about it. Razz
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Finglonga
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PostPosted: 11:31 - 18 Dec 2008    Post subject: Reply with quote

bikedemon99 wrote:
round r,bouts


Thinking
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robbieguy2003
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PostPosted: 13:29 - 18 Dec 2008    Post subject: Reply with quote

Quote:
which you have worn with your lack of cornering then don't worry about it.


Don't quite agree with that, I know many good riders that are quick round corners that end up with squared tyres - mainly because they commute during the week and are mainly on fairly straight roads...

Obviously weekend warriors with square tyres though are a little different.
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Wil
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PostPosted: 17:57 - 18 Dec 2008    Post subject: Reply with quote

I could count the corners of my 20 mile commute on one hand. It's a bloody shame is what it is, because when I do go for a hoon I have to do it on bloody squared tyres. Crying or Very sad
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robbieguy2003
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PostPosted: 18:17 - 18 Dec 2008    Post subject: Reply with quote

Same with mine - and with it being 140 mile round trip - at least 90 miles of that is pretty straight - it eats tyres and squares them somewhat- even with the harder compounds in the middles - about the best I've found were the Bridgestone 020 but i'm currently back on 014s and will get a pair of 015s for the summer Very Happy
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ms51ves3
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PostPosted: 18:34 - 18 Dec 2008    Post subject: Re: Tyre tread depth question Reply with quote

Faraz wrote:
Quote:
The legal limit of tyre tread depth in the UK for motorcycles
over 50cc is 1mm across 3/4 of the width of the tread pattern
and with visible tread on the remaining 1/4. For motorcycles
up to 50cc the law requires that all the grooves of the
original tread pattern must be clearly visible.
The legal
requirements may differ in other countries.



True?


As far I know it only applies to mopeds (50km/h and under 50cc).

So technically, I think your bike should have 1mm minimum.
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Faraz
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PostPosted: 18:46 - 18 Dec 2008    Post subject: Reply with quote

Bike is a 2006 Rs50.
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ms51ves3
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PostPosted: 18:50 - 18 Dec 2008    Post subject: Reply with quote

Faraz wrote:
Bike is a 2006 Rs50.


And how fast does it go? Wink
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Faraz
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PostPosted: 18:51 - 18 Dec 2008    Post subject: Reply with quote

ms51ves3 wrote:
Faraz wrote:
Bike is a 2006 Rs50.


And how fast does it go? Wink


Shifty
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MattHirst
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PostPosted: 22:28 - 18 Dec 2008    Post subject: Reply with quote

Where did you quote that from? As i was led to believe that cars is 1.6mm accross 75% of the tyre around the whole circumferance. Where as bikes it is 1mm accross the WHOLE tyre, not just 75%.
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Faraz
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PostPosted: 22:45 - 18 Dec 2008    Post subject: Reply with quote

MattHirst wrote:
Where did you quote that from? As i was led to believe that cars is 1.6mm accross 75% of the tyre around the whole circumferance. Where as bikes it is 1mm accross the WHOLE tyre, not just 75%.



https://www.tyresafe.org/data/files/TyreSafe%20Motorcycle.pdf
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Faraz
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PostPosted: 22:47 - 18 Dec 2008    Post subject: Reply with quote

Other sites confirm its 75%
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