Photobucket


+- +-

+-User

Author Topic: Hillclimb tyres  (Read 641 times)

0 Members and 0 Guests are viewing this topic.

Offline RobT

  • Full Member
  • ***
  • Posts: 128
  • 'Ave IT
  • Location: Cheshire
    • View Profile
Hillclimb tyres
« on: July 07, 2012, 08:27:46 am »
Hi

Conventional wisdom suggests that Avon crossplies are the way to go, usually supersoft A15 or A39 compound. Personally i dont get on with them, but maybe thats because my car is too heavy at 950kg. Radials are better for me, but supersoft compounds are scarce. Have used michelin moulded rally slick NO2 to some success, and similar Dunlop CR311 in 'wet' X22 seems good, although i have not personally used it.

What are your experiences?

Cheers

Rob
2008 Audi A6 2.0TDI S-Line
2004 Audi A4 Avant 1.8T Quattro S-Line
1996 Seat Ibiza 16V F1.5 Race car

Share on Facebook Share on Twitter


Offline samfish

  • Newbie
  • *
  • Posts: 32
  • Welcome to the JMR forum.
    • View Profile
Re: Hillclimb tyres
« Reply #1 on: July 07, 2012, 11:30:12 am »
Does anyone use Circuit 'wet' tyres?

They are SUPER soft. Maybe too soft? They soon get chewed up in the dry, but maybe not too bad on a short hill and a light car?

We have some of the excellent 15inch Dunlop wets part-worn that could be tried....

Offline RobT

  • Full Member
  • ***
  • Posts: 128
  • 'Ave IT
  • Location: Cheshire
    • View Profile
Re: Hillclimb tyres
« Reply #2 on: July 08, 2012, 01:38:44 pm »
I dont think wets would have enough grip, soft yes, but too little tread on the ground. Have an email with dunlop presently enquiring about uncut wets which might be an option....
2008 Audi A6 2.0TDI S-Line
2004 Audi A4 Avant 1.8T Quattro S-Line
1996 Seat Ibiza 16V F1.5 Race car

Offline Tonyb

  • Jr. Member
  • **
  • Posts: 61
  • Welcome to the JMR forum.
  • Location: Ammanford
    • View Profile
Re: Hillclimb tyres
« Reply #3 on: August 18, 2012, 03:37:50 pm »
I use Dunlop CR311 in X22 super soft compound. Works fine but could use a softer compound on the hills. On a sprint at say Pembrey on the second loop they are just starting to go off so as an all round tyre pretty good.

They are also cheaper that 'proper' slicks at about half the price (approx 500.00 a seat as opposed to 1000.00 a set!!). That said I am told that Avon radials in a proper hill climb compound are worth at least a second over a rally slick. I have a set of 8j rims here ready to check this out but that will be next year now. I'll let you know when I do!

As I under stand x22 is a wet compound, they normally cut them in to full wets. I use them un cut as wets and they are fine as long as there is not too much standing water. It's not unheard of for the Golf to be the fastest car on circuit in the wet on x22 slicks! Great feel and confidence from them.

Offline GEL

  • Full Member
  • ***
  • Posts: 104
  • Welcome to the JMR forum.
  • Location: Doha
    • View Profile
Re: Hillclimb tyres
« Reply #4 on: January 01, 2013, 11:02:09 am »
Rob,

Out of interest ... what suspension `set up` did you run the crossplies with ? , especially camber.

Thank you.
Mk1 Golf GTI 16v
Alpina B10 V8 Touring
Audi S4 Avant V6 quattro

Offline RobT

  • Full Member
  • ***
  • Posts: 128
  • 'Ave IT
  • Location: Cheshire
    • View Profile
Re: Hillclimb tyres
« Reply #5 on: January 03, 2013, 08:26:39 am »
Used -1 to -1.5, about as much as you would want to put on a crossply but less than a radial typically uses
2008 Audi A6 2.0TDI S-Line
2004 Audi A4 Avant 1.8T Quattro S-Line
1996 Seat Ibiza 16V F1.5 Race car

Offline GEL

  • Full Member
  • ***
  • Posts: 104
  • Welcome to the JMR forum.
  • Location: Doha
    • View Profile
Re: Hillclimb tyres
« Reply #6 on: January 03, 2013, 09:43:31 am »
Thanks

FYI ... many people `up here` use zero camber in order to get them `to work`. A varied mix of small hatches through to Caterhams etc.
Mk1 Golf GTI 16v
Alpina B10 V8 Touring
Audi S4 Avant V6 quattro

Offline RobT

  • Full Member
  • ***
  • Posts: 128
  • 'Ave IT
  • Location: Cheshire
    • View Profile
Re: Hillclimb tyres
« Reply #7 on: January 03, 2013, 09:47:14 am »
I think that works ok on a Caterham, but hatchbacks lean a lot.....
2008 Audi A6 2.0TDI S-Line
2004 Audi A4 Avant 1.8T Quattro S-Line
1996 Seat Ibiza 16V F1.5 Race car

Offline GEL

  • Full Member
  • ***
  • Posts: 104
  • Welcome to the JMR forum.
  • Location: Doha
    • View Profile
Re: Hillclimb tyres
« Reply #8 on: January 03, 2013, 09:52:19 am »
OK ... I`ll check out the set up`s next time around.
Mk1 Golf GTI 16v
Alpina B10 V8 Touring
Audi S4 Avant V6 quattro

Offline RobT

  • Full Member
  • ***
  • Posts: 128
  • 'Ave IT
  • Location: Cheshire
    • View Profile
Re: Hillclimb tyres
« Reply #9 on: January 03, 2013, 10:11:18 am »
My ibiza used to fold over the outer edge of the tyre even with some negative camber on. Discussed it all with paul smith at bmtr at the time (avon guru) and only conclusion was that radials would suit my car better. And have gone much faster on them than on avon hillclimb crossplies. Go figure....
2008 Audi A6 2.0TDI S-Line
2004 Audi A4 Avant 1.8T Quattro S-Line
1996 Seat Ibiza 16V F1.5 Race car

Offline GEL

  • Full Member
  • ***
  • Posts: 104
  • Welcome to the JMR forum.
  • Location: Doha
    • View Profile
Re: Hillclimb tyres
« Reply #10 on: January 03, 2013, 12:47:59 pm »
Good info, thanks.
Mk1 Golf GTI 16v
Alpina B10 V8 Touring
Audi S4 Avant V6 quattro

 

+-Recent Topics

JMR Customer Cars