Used trackday slicks required for SR4

[elf63]

Looking for a decent set of 13" slicks for my recently purchased SR4 to be used for trackdays.
Current sizes are : Rears 250x570x13 / Fronts 195x530x13 ( Dunlop SP Sport)
Happy to have Radical spec sizes : 230x570x13 / 190x535x13
Steve

Edited by elf63 on Sunday 6th March 23:32

[BertBert]

Depends how quickly you need them. I'll be able to have some after the first race on 2nd April.
Bert

[splitpin]

Steve

Did you make a couple of typos with those sizes?

I.e. Radical Dunlops for 8" fronts and 10" rears are 190/535/13 and 230/570/13. From memory, the only 250s rears I've come across are Avons?

I'll have to check when you clarify; I may be able to help.

[elf63]

splitpin said:

Steve

Did you make a couple of typos with those sizes?

I.e. Radical Dunlops for 8" fronts and 10" rears are 190/535/13 and 230/570/13. From memory, the only 250s rears I've come across are Avons?

I'll have to check when you clarify; I may be able to help.

Definately sizes quoted and Dunlop, probably ex F3 throwaways?

The set of sprint/hillclimb tyres that came with the car are the sizes you've stated,

so i'm more than happy to go with those sizes for track.

Thanks

[tonto1]

elf63 said:

The set of sprint/hillclimb tyres that came with the car

sprint/hillclimb tyres?? - Tell me more, as I am currently trying to decide on what best to use for hillclimbing/sprinting in my Radical.

ps. Apologies for the thread hyjack!!

[elf63]

elf63 said:

splitpin said:

Steve

Did you make a couple of typos with those sizes?

I.e. Radical Dunlops for 8" fronts and 10" rears are 190/535/13 and 230/570/13. From memory, the only 250s rears I've come across are Avons?

I'll have to check when you clarify; I may be able to help.

Definately sizes quoted and Dunlop, probably ex F3 throwaways?

The set of sprint/hillclimb tyres that came with the car are the sizes you've stated,

so i'm more than happy to go with those sizes for track.

Thanks

Doh! Just checked and you're right - Avons fitted. I'll try and engage brain in the future.
Let me know what you've got please.

Also, the wets that came with the car are Avons - marked 'FF ZETEC' 6.0/21.0x13 fronts & 7.0/22-0x13
Are these appropriate or do i need the specified Radical set, anyone have any?
I'm sure i'll get there eventually!

[Laurence7]

Just to muddy the waters even more Steve, the designation of the slicks you're after suggests radials, whereas the Zetec wets are cross-plies - the same as used on Clubsports in the early days. The former will generally need more camber than the latter.

I'm not sure about the SR4's but early Clubsports and Prosports had 'long' upper wishbones for a moderate amount of camber (approx 0 - 2 deg), for use with the cross-ply Avons, but when Radical went with Matador and then Dunlop radials, they made the 'high-camber' ('short') upper wishbones to get more camber (approx 2 - 4 deg).
Does that make sense?

[splitpin]

Elf YHM

[splitpin]

Laurence7 said:

Just to muddy the waters even more Steve, the designation of the slicks you're after suggests radials, whereas the Zetec wets are cross-plies - the same as used on Clubsports in the early days. The former will generally need more camber than the latter.

I'm not sure about the SR4's but early Clubsports and Prosports had 'long' upper wishbones for a moderate amount of camber (approx 0 - 2 deg), for use with the cross-ply Avons, but when Radical went with Matador and then Dunlop radials, they made the 'high-camber' ('short') upper wishbones to get more camber (approx 2 - 4 deg).
Does that make sense?

Likely not a big problem as Radials were standard when the SR4 came out in 2003/4. That said, camber and toe best checked as someone has obviously previously 'experimented'; hillclimbers aside with their super-sticky Avon compounds, heavens know why

[elf63]

splitpin said:

Laurence7 said:

Just to muddy the waters even more Steve, the designation of the slicks you're after suggests radials, whereas the Zetec wets are cross-plies - the same as used on Clubsports in the early days. The former will generally need more camber than the latter.

I'm not sure about the SR4's but early Clubsports and Prosports had 'long' upper wishbones for a moderate amount of camber (approx 0 - 2 deg), for use with the cross-ply Avons, but when Radical went with Matador and then Dunlop radials, they made the 'high-camber' ('short') upper wishbones to get more camber (approx 2 - 4 deg).
Does that make sense?

Likely not a big problem as Radials were standard when the SR4 came out in 2003/4. That said, camber and toe best checked as someone has obviously previously 'experimented'; hillclimbers aside with their super-sticky Avon compounds, heavens know why

Will have to check it out, last flat floor set up was showing -2.5deg camber with 2mm toe in.

[elf63]

splitpin said:

Elf YHM

Thanks Trev, much appreciated.

[superlight7]

Elf - YHM reference Wets

[mabbott]

I have a set of Radical dunlops that are now surplus off my pr6. Done 1 race wkd and one test day. Will fit an sr4 directly I think. Will send email. Mark

[splitpin]

mabbott said:

Done 1 race wkd and one test day.

At the pace you were carrying latter part of last season, virtually fecked then?

Elf, 'no sweat'; just tickling Mark (but his pace was great); if he says they're OK for TD Use, they will be, you can rely on it.

Edited by splitpin on Tuesday 15th March 19:37

[Extremeracer]

I will have a set of used race Dunlops to fit your SR4 after March 26th.
Note that there is some confusion over the size marked on the tyre and the actual measured size with certain Avons. Talk to David in BMTR racing department on 0121 331 1122 who will explain all and answer your questions about compounds.

[elf63]

[quote=Extremeracer]I will have a set of used race Dunlops to fit your SR4 after March 26th.
Note that there is some confusion over the size marked on the tyre and the actual measured size with certain Avons. Talk to David in BMTR racing department on 0121 331 1122 who will explain all and answer your questions about compounds.[/quote

Thanks David, i'll give them a call

[mabbott]

There's tons of life in them as snetterton the orhe day testified :-)