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BadgerBaiter

499 Posts
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Brighton

Ideally I have 'regular wheels' to get me to the track and then swap them over for the bigger ones.
I don't know if its really worth it though

http://www.jolyonway.com


MikeRace

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6549 Posts
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#1 Basshunter Fan

Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes!

What tyres are these??

Any Pics, im after some fatter tyres for mine.


On 20th Apr, 2009 BadgerBaiter said:
Dunlop do some special 10x8 tyres - they can be fitted onto 10x9s according to Dunlop.
These are just semi slicks or slicks I seem to remember.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/


Mr Joshua

2496 Posts
Member #: 1954
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Luton Bedfordshire




On 19th Apr, 2009 James_H said:
Indeed MrJ but what is the optimum scrub angle?

I'm hardly clued up on geometry and would be interested to know because I can base my wheel size and offset on that then.

Also say you have a 6" wide wheel with an ET of -7 and a 7" wide wheel with the same ET, does the scrub radius change?
No.

Own the day


BadgerBaiter

499 Posts
Member #: 2257
Senior Member

Brighton


Went onto their website, Motorsport range>circuit>miscellaneous... and its the 3rd one down.

http://www.dunloptyres.co.uk/ourTyres/motorsport/circuit/

However, it looks like they are Special Order only, so I have no idea how much they would cost...

On 20th Apr, 2009 MikeRace said:
What tyres are these??

Any Pics, im after some fatter tyres for mine.

http://www.jolyonway.com


Mr Joshua

2496 Posts
Member #: 1954
Post Whore

Luton Bedfordshire




On 20th Apr, 2009 Mr Joshua said:



On 19th Apr, 2009 James_H said:
Indeed MrJ but what is the optimum scrub angle?

I'm hardly clued up on geometry and would be interested to know because I can base my wheel size and offset on that then.

Also say you have a 6" wide wheel with an ET of -7 and a 7" wide wheel with the same ET, does the scrub radius change?
No.
Hope this helps

The scrub radius is the distance in front view between the Steering Axis and the center of the contact patch where both would theoretically touch the road. The steering axis is the line between the top pivot point of the hub and the lower ball joint of the hub. On a MacPherson strut, the top pivot point is the strut bearing, and the bottom point is the lower ball joint. The inclination of the steering axis is measured as the angle between the steering axis and the centerline of the wheel. This means that if your camber is adjustable within the pivot points (i.e. Volkswagen) you can change the the scrub radius, this alters the width and offset of tyres you can safely run on your car.

Own the day


James_H

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3692 Posts
Member #: 1833
Formally mini_majic

Auckland, New Zealand

yeah, i know that bit i was just, wondering if the centerline of the wheel changed if the offset was the same but the wheel was wider. therefore changing the scrub radius.

does that make sense? hard to explain but it makes sense in my head.

Edited by James_H on 21st Apr, 2009.


Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

no that doesnt make sense.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Tareq

128 Posts
Member #: 970
Advanced Member

Bahrain

I have a set of those Dunlop 180/490/10 slicks mounted on some KAD 8x10" wheels.. When I bought them they told me they were special order but they sent them quite quickly.. I think they were over GBP100 a tire.

Hoosier do a slicks that fit on 8 and 9 x 10" wheels aswell.


James_H

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3692 Posts
Member #: 1833
Formally mini_majic

Auckland, New Zealand

uhmmm

right, my simple mind is struggling to put this into a cohearant written sentence!

you already answered this i think Joe but maybe i had you thinking about something else?

if you had a wheel that is 6" wide with an ET of +10 would the center line of that wheel be the same of that on a wheel that is 7" wide with the same ET of +10?

so basically is the center line just determined by the offset or is it a mixture of the wheel width and the offset?


Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

ah,

"if you had a wheel that is 6" wide with an ET of +10 would the center line of that wheel be the same of that on a wheel that is 7" wide with the same ET of +10?"

yes

centerline of the tyre essentially the same as offset, Offset is merely the amount the centre line is from the fave that bolts to the hub.

onething worth mentioning is, when i first started looking into offsets i found people just quoting backspace (distance from hu face to rear of rim) and wheel width, at first this really confused me as these seemed pointless as it was not being related to the hub/ steering access...

But, then the penny dropped that these people knew the maximum backspace that could be used on their cars before contact occured, so they were in effect keeping the scrub radius as small sa possible.




On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



James_H

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3692 Posts
Member #: 1833
Formally mini_majic

Auckland, New Zealand




On 21st Apr, 2009 mini13 said:


centerline of the tyre essentially the same as offset, Offset is merely the amount the centre line is from the fave that bolts to the hub.




FFS....I knew this already so why the Fudge couldnt i think straight and realise that its OBVIOUS!!!

*hangs head in shame*

so to figure out the optimum offset (if you know the optimum scrub radius) you could measure from the hub face to the steering axis "point of intersection" and then work out what offset relaters to that measurement.

please tell me that sounds right, otherwise i might go get a noose haha!

even though this would more than likely be the resort taken after rose jointed suspension to reduce torque steer etc, im finiding it pretty interesting to research!


Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

yep thats essentially it,

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



James_H

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3692 Posts
Member #: 1833
Formally mini_majic

Auckland, New Zealand

Thank fuck for that! haha!


Mr Joshua

2496 Posts
Member #: 1954
Post Whore

Luton Bedfordshire

Do what I did, back up your thought with a straight edge and ruler. Go out to your car and take some measurements, you will be able to get the wheel width and ofset you want bang on.

Own the day


fritz

26 Posts
Member #: 2331
Member

Nuernberg (Nuremberg, Franconia in Bavaria), Germany

Some dimensions concerning Mini rims
OFFSET BACKSPACING WHEEL WIDTH

see pdf attachement


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