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firstly is there any service description moudled in to the sidewalls ?
size / spec / load / speed index / max psi etc
and are those 2 grooves the only tread ?
the draggers 'JUST' get away with these because of the side cuts if it helps ya case
size / spec / load / speed index / max psi etc
and are those 2 grooves the only tread ?
the draggers 'JUST' get away with these because of the side cuts if it helps ya case
thinking back didn't colway do a 'road legal' slick tyre a few years back ?
at Ypres at the IRC tarmac rally, BF Goodrich had tyres with a similar looking pattern to that, to run on stage & liason sections
i'd guess that there is a ratio of grooves required to tread area? or side cuts needed to take water away?
not sure whats on the sidewalls but the two main grooves are the only real tread
Those Colways are FIA-homologated tyre who's tread must be a minimum of 17% of the tyre area. All the major manufacturers make them for rallying in various compounds. The large tyre retailer EARS tell me that only some of them are UK road legal - only the ones that are e-marked - Dunlop recently got some of them e-marked but only the ones that are in the harder compounds as apparently the softer ones wont pass an abrasive drum test that is part of the the e-mark testing
http://www.ears.co.uk/motorsport/acatalog/Online_Catalogue_13___Road_Legal_CR311_323.html
Details also at Demon Tweeks
http://www.demon-tweeks.co.uk/produ...cls=MSPORT&pcode=DMS2154513R08&vat=exc&cc=eur
Those Colways are FIA-homologated tyre who's tread must be a minimum of 17% of the tyre area. All the major manufacturers make them for rallying in various compounds. The large tyre retailer EARS tell me that only some of them are UK road legal - only the ones that are e-marked - Dunlop recently got some of them e-marked but only the ones that are in the harder compounds as apparently the softer ones wont pass an abrasive drum test that is part of the the e-mark testing
http://www.ears.co.uk/motorsport/acatalog/Online_Catalogue_13___Road_Legal_CR311_323.html
Details also at Demon Tweeks
http://www.demon-tweeks.co.uk/produ...cls=MSPORT&pcode=DMS2154513R08&vat=exc&cc=eur
the sidecut ones i would imagine would be ok if correctly e-marked as it's depth across 75% of the width for mot etc but does FIA homolgamation automatically make them road legal? or is that just competition spec allowable as and when specified ?
the dunlops look like a modern take on the colways but as you said only some colours/compounds were allowed in past - double yellow rings a bell but been 10+yrs i can't remember
who do you need to convince with the stripers Rob ? Scrutineering or Mot ?
the dunlops look like a modern take on the colways but as you said only some colours/compounds were allowed in past - double yellow rings a bell but been 10+yrs i can't remember
who do you need to convince with the stripers Rob ? Scrutineering or Mot ?
it does tend to do that
apparently also, the tyre has to have 20% tread which most trackday tyres have (but not the ones at the top of this thread)
http://www.pistonheads.com/gassing/topic.asp?t=697769
This thread also says that tyres dont have to be e-marked.....so there is clearly a lot of confusion out there
apparently also, the tyre has to have 20% tread which most trackday tyres have (but not the ones at the top of this thread)
http://www.pistonheads.com/gassing/topic.asp?t=697769
This thread also says that tyres dont have to be e-marked.....so there is clearly a lot of confusion out there
/me scuttles off to see what sizes Michelin TB5R's come in and i bet they are all too low profile - mmmm
Well I don't know how many of you read Evo magazine, but I was devastated when I opened my subscription this month and found out about plans to outlaw trackday tyres.
The law won't come in for a while (Nov 2012), so you can probably get through a set or two before it kicks in, but it's yet another example of how the government hates us petrolheads. Having said that, it is hard to argue a case for tyres that are so bad in the wet.
Read the article here
Discuss!
The law won't come in for a while (Nov 2012), so you can probably get through a set or two before it kicks in, but it's yet another example of how the government hates us petrolheads. Having said that, it is hard to argue a case for tyres that are so bad in the wet.
Read the article here
Discuss!
E-marked was the predominant factor at castle combe saloons and msa's blue book, list 1a and list 1b tyres.. if its not on the list it was not deemed legal.
some contradiction and confusion ensued however, as the then "tyre to have" was a bridgestone re071, but only available in E marked in a single 225-45-17 size (imprezza sti new cars at the time std fitment), BUT you could buy the re071 in other sizes outside of uk, but they were not E marked and thus not legal.
same thing goes for the ad07 yoko's here, available in the usa in all sorts of sizes but only in the same single size, so no E mark, and not legal here. Dot approved in USA is not legal uk approved.
all quite confusing..
some contradiction and confusion ensued however, as the then "tyre to have" was a bridgestone re071, but only available in E marked in a single 225-45-17 size (imprezza sti new cars at the time std fitment), BUT you could buy the re071 in other sizes outside of uk, but they were not E marked and thus not legal.
same thing goes for the ad07 yoko's here, available in the usa in all sorts of sizes but only in the same single size, so no E mark, and not legal here. Dot approved in USA is not legal uk approved.
all quite confusing..
outlawing road legal extreme ones
so will it affect it that much ? trackday tyres for on track such as slicks etc would be now but i guess it would make a massive market void for dual-purpose stuff
just means some of the sportscars makers will have to design cars that can do the 'magic' with all round tyres instead
so will it affect it that much ? trackday tyres for on track such as slicks etc would be now but i guess it would make a massive market void for dual-purpose stuff
just means some of the sportscars makers will have to design cars that can do the 'magic' with all round tyres instead
Tis Europe that is pushing for the exclusion of semi slick tyres. Only problem is we are the only state likely to adopt it as most here have still not got the idea of summer and winter tyres.
I've always found that a hot piece of metal with a reverse E inside a iccle circle usually does the trick for my gravel tyres and MOT's., grumpy traffic officers etc.
Far from ideal but when in schtuck - get inventive.
I've always found that a hot piece of metal with a reverse E inside a iccle circle usually does the trick for my gravel tyres and MOT's., grumpy traffic officers etc.
Far from ideal but when in schtuck - get inventive.
That's like asking mickey thompson if they do snow tyres!
Shame we dont understand the winter/summer tyre thing here in the UK, the roads would be so much easier in the winter.
thats what they have told me also - unfortunately there are some people who think they are UK road legal, despite the manufacturers of the tyre saying otherwise......
From above:
From past event discussion (this all relates to an event in 2003):
There's a lot of opinion on this topic, but there's no substitute for facts.
This is the official position, posted here as a matter of record:
Department for Transport
Sent:
Reply in:
The Event Rules in question
'Cars must be roadworthy, incl. lights, MOT'd, taxed and insured'.
QED (and vindication).
thats what they have told me also - unfortunately there are some people who think they are UK road legal, despite the manufacturers of the tyre saying otherwise......
From past event discussion (this all relates to an event in 2003):
RobT said:you have to use road legal tyres (i.e not Hoosiers
RobT said:
There's a lot of opinion on this topic, but there's no substitute for facts.
This is the official position, posted here as a matter of record:
Department for Transport
Sent:
* Not one of those pictured at the top of this threadChris Eyre said:
Reply in:
Department for Transport said:
The Event Rules in question
'Cars must be roadworthy, incl. lights, MOT'd, taxed and insured'.
QED (and vindication).
Further detailed information:
Road Vehicles (Construction and Use) Regulations 1986, as amended (hereinafter: 'C&U')
All tyres must have:
This justifies the road legality of a Michelin TB5 tread.
Tread pattern design
Aside from the tread depth requirements above (also reflected in ECE 30):
The MOT Test (car tyres)
No checks for tread design or e-marks:
- the wording of the checks is clearly based on C&U.
Page 4: e-marks are required on tyres marked 'NHS', 'Not for Highway Use' or similar, in the sidewall (introduced 1 Dec 2008 onwards). Notably no e-mark requirement listed for road tyres.
Insurance requirements
UK insurers of imported cars cover vehicles from other continents on a day-to-day basis, with the tyres they arrive on.
Extract from a UK insurance policy booklet from an insurer specialising in American cars.
Individual Vehicle Approval Scheme
(low volume, kitcars, imports, etc - replaced SVA)
IVA Manual
VOSA Categorisation of Defects
If a vehicle were to be deemed unroadworthy by the Police or other highway officials and subjected to inspection, the defect(s) would be found listed in the VOSA Categorisation of Defects manual.
No references to design or e-marks are made in respect of tyres. The manual is again based on C&U.
HTH.
Road Vehicles (Construction and Use) Regulations 1986, as amended (hereinafter: 'C&U')
All tyres must have:
- a service description (i.e. load and speed index).
- nominal size and aspect ratio, marked on at least one sidewall of each tyre.
- cars and light trailers must have a minimum of 1.6mm in a continuous band throughout the central three-quarters of the tread width, throughout the whole of the circumference.
This justifies the road legality of a Michelin TB5 tread.
Tread pattern design
Aside from the tread depth requirements above (also reflected in ECE 30):
- C&U or UN/ECE 30 has no requirement for grooves of a specific percentage surface area, eg 20% mentioned earlier in this thread.
- C&U or UN/ECE 30 does not dictate tread design.
- The FIA's 17% tread pattern moulded slick is their own self-derived percentage, and is not UK / EU legislation.
The MOT Test (car tyres)
No checks for tread design or e-marks:
- the wording of the checks is clearly based on C&U.
Page 4: e-marks are required on tyres marked 'NHS', 'Not for Highway Use' or similar, in the sidewall (introduced 1 Dec 2008 onwards). Notably no e-mark requirement listed for road tyres.
Insurance requirements
UK insurers of imported cars cover vehicles from other continents on a day-to-day basis, with the tyres they arrive on.
Extract from a UK insurance policy booklet from an insurer specialising in American cars.
- This insurer is fully aware that tyres may not necessarily be e-marked.
- The terminology is 'roadworthy' - aka 'safe for use on the road' (see DfT response).
Individual Vehicle Approval Scheme
(low volume, kitcars, imports, etc - replaced SVA)
IVA Manual
IVA Manual said:
VOSA Categorisation of Defects
If a vehicle were to be deemed unroadworthy by the Police or other highway officials and subjected to inspection, the defect(s) would be found listed in the VOSA Categorisation of Defects manual.
No references to design or e-marks are made in respect of tyres. The manual is again based on C&U.
HTH.
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