Urgent Help Required - Tyres

[RS WST]

After sprinting last weekend I've just noticed a nail in my back tyre which cannot be repaired.  

I have been using Avon ACB 10's  245 x 13 in a hard compound and wasn't overly impressed for road driving.

I use the car for road but do the occasional event.

I found that with the Avons they need loads of temp in them to work properly as they are a track tyre and are useless in the damp.

I was thinking of going to a more road type tyre.

Either Avon CR500 or Kumho V70 as they are the only companies that make them wide enough in a 13" before you all start ranting about Yoko' or 888.

Avon CR500 come as they are.

Kumho are available in soft medium and hard compounds.

Has anyone tried any of these tyres?

I need to order them ASAP as I'm racing agian this Fri.

[Steve R]

I thought the CR500s only came in 13" sizes up to 205 wide (i.e. same as the Yokos etc)?  

Nothing wider is listed here...

Happy to be proved wrong though.  

Steve.

[Steve R]

Happy to be proved wrong though.  

Ok, just proved myself wrong  

You can get 245 CR500s too, just spotted them here.

I am in a similar situation - found a nail in a rear ACB-10 on my car the other week and have bought a set of CR500s to replace them with as I'd like an improvement in road manners.  

Afraid I can't comment on the CR500s vs the ACB10s though as I haven't driven the CR500s yet (the Caterham split rims I am also fitting means I need wider arches, so the car is off the road until they arrive).

Steve.

[Bazzer]

Hi

CR500 are nice compromise for road/track.

Not as sticky as ACB10's on track though.

Bazzer

[Terry Everall]

Remember that your tread on ACB 10 crossply is NOT 245 but more like 215mm if you measure it

The other tyres you quote are radial which means 205 gives 205 tread width. CR500 ok on road but not too great on track IMHO

[scruffythefirst]

V8 yob on the dax forum is running khumo's on his v8 racer on 9 inch rims iirc

[Bazzer]

Remember that your tread on ACB 10 crossply is NOT 245 but more like 215mm if you measure it

The other tyres you quote are radial which means 205 gives 205 tread width. CR500 ok on road but not too great on track IMHO

Hi Terry

Don't forget they changed the compound on CR500 a while back. The first lot used to overheat on track. They new ones are a lot better.

Bazzer

[Terry Everall]

Bazzer I was on track 3 weeks ago at brands hatch in a Cateringvan with Cr500 and it was difficult to get it to turn in and understeered like mad if you  gave it wellie too early

[Chris.B]

Both myself & Tony Sighe (AO Chelt / Glos) have CR500's all round on ours.  Have been great on the track & good enough on the road.  Wear out quite quickly & cost more than yokos etc.  Weigh a darn sight less than most other tyres too (apart from ACB10's)  Not cheap though.

[conibear]

IME, the Avon tyres mentioned are good. But you should be looking at the compound that suits you.

What do you want from these tyres

[RS WST]

Decided to try the Kumho in a soft compound back and front.

£300 for four as apposed to £550 for a set of Avons

Worth a try.

Duncan Cowper is running them on his DAX and he blitzed everything last weekend at elvington.

Lets wait and see after this weekend

[oioi]

Bazzer I was on track 3 weeks ago at brands hatch in a Cateringvan with Cr500 and it was difficult to get it to turn in and understeered like mad if you  gave it wellie too early

sounds like a standard caterham setup to me!

[Blatman]

I think Nana's tried a set of V70's. May be worth dropping him a PM if he doesn't see this...

[Bazzer]

Bazzer I was on track 3 weeks ago at brands hatch in a Cateringvan with Cr500 and it was difficult to get it to turn in and understeered like mad if you  gave it wellie too early

Enough said then  

Bazzer

[v7slr]

Tyres are a mixture of rubber and other stuff... plastics I suppose. I can't comment on the particular Khumos you mention, but I've used them on a road car before and the amount of plastics appeared to be higher than comparative-sized Michelins as witnessed by their relative lack of grip and longevity.

The ACB10 is my favourite of all tyres but you are right that if you cannot get them hot on the road then you are not realising their full potential. I love them. I drive quite hard so my opinion of them is that they're fantastic even in the wet. In fact, they were originally designed as FF wets (I believe). On a wet (constant rain) tour of Ireland I pulled into a petrol station to fill up and by the time I went in to pay, they tyres were dry. They were that warm.

They tram-line though. The crossply construction that makes them such a joy on turn-in, is what makes them tram-line, and that is where the CR500s take over. They are nearly as light as ACB10s, they come in similar sizes and the compounds are more suited to the road (not everyone can get the best out of ACB10s). They are radials too, so you get 9/10ths of the performance of an ACB10 but without the downsides.

Neither are much good in freshly ploughed fields though (ask Oi Oi).