Kumho v70 tyres... (again)

[BigCol]

Eugene7 said:

BigCol said:

at £100 a corner, not so different to these, Steve...
https://caterhamparts.co.uk/zzs/5246-tyre-avon-zzs...

which have got reviews in terms of both grip and longevity... or are they too thin at 55 profile for Eugene?

You posted that already... and I replied

Way too bloody small!!!

dunno how that got reposted...
bloody computers!

[mono fraud]

Eugene7 said:

I'm trying to be a bit more thoughtful on what's best for fast road use, especially as we do a lot of hard miles in the summer across/around France/Spain, etc.

I am still amazed people reply track experience when the OP, clearly states road usability... Golly! When will people learn that, if one asks about road, is road experience, not track...

[DCL]

mono fraud said:

I am still amazed people reply track experience when the OP, clearly states road usability... Golly! When will people learn that, if one asks about road, is road experience, not track...

The kumho V70a is sold as a motorsport tyre and described by Kumho as 'Impressive tyre grip for optimised handling on the track'. So it's unlikely there's many people that use it just for the road.

Eugene7 has probably more Caterham experience than us all put together, and he is more than capable of choosing the information that's relevant. I'm afraid your moderation isn't really needed.

Edited by DCL on Friday 24th February 18:22

[Some Gump]

mono fraud said:

I am still amazed people reply track experience when the OP, clearly states road usability... Golly! When will people learn that, if one asks about road, is road experience, not track...

Since we ways tracked with cr500 above all else, we found whatever was good on track was also mega on road. The only adjustment between the 2 was to soften the rear bar 1 or 2 holes.

I've never had a ride height issue with it set for the smaller tyres, and they left the factory on em - but I don't live where op does, and it's not my car so if he wants more clearence then that's clearly the right answer.

People are just trying to be helpful, it's not the end of the world if one or two people's ideas are wide of the mark.

[mono fraud]

Sorry but, I am stating a fact, not moderating.

[Tazio77]

Mono, try and pick your words more carefully, you are coming across as a pretentious pr_ck

[mono fraud]

LOL... OK.

Cheers.

[Eugene7]

So, the latest on this saga...

Kumho now say they are unlikely to make any more v70's in 70 profile...

I have looked at swapping to different rims, to allow lower profile tyres with a similar overall diameter, but that's difficult with my PCD.
(Ital)

So, at least for the next tyre purchase I'm going to go with a more 'standard' tyre of the correct size for me.
The options seem to be:

[i]Uniroyal RainExpert 3
Continental ContiEcoContact 3
Nankang Econex NA-1
Nexen N'Blue HD Plus
Kumho KH17[/i]

Does anyone have weight info for the different tyres?

So... what to go for???

Edited by Eugene7 on Monday 20th March 21:49

[12ax7]

I'm in the same boat; very annoying about the V70s in 70 section. I had half decided to go for Rainexperts when my AO21s wear out although they were diabolical when I had them on my 3 series BMW, too soft which might make then better on the 7 which weighs about a third of the BMW. Plan B is Toyo R888R but that means 205/60R13 on the rear and new rims. I'll wind the platforms up on the front and sort out the handling some other way if I need to. Can't do that on the rear as the axle hits the chassis.

Edited by 12ax7 on Monday 20th March 14:01

[Eugene7]

Unfortunately, you can't 'wind up the platforms, and sort out the handling later'...
The platforms must be positioned to set the handling, not the other way round.
(Rule of thumb, the lower wishbones should be parallel to the ground.)

[12ax7]

The amount we're talking converts to 3 degrees on the lower wishbone and it's not like I'm trying to break a lap record or anything. The choice is shopping trolley tyres or a less than ideal set up, it's a compromise I'm willing to try and for what I want it for it probably wont make much difference anyway. YMMV.

Edited by 12ax7 on Monday 20th March 22:14

[Eugene7]

Yeah, I can't argue with that!

[Eugene7]

Ok - tyres ordered!

Toyo Proxes R888R
2x 185/60r13 for the front - 2x 205/60r13 for the rear
The recommended rim size for the 185 is 5.0 – 6.5, and for the 205, 5.5 – 7.5.
I will be using 6 all round.

[Skyedriver]

In a similar boat having just orderedreplacement wheels, 6" all round.
Was thinking R888R but 185x60x13 all round and the spare.

So why the wider treads on the rear?

As an aside: many years ago (1984) I bought a Lotus 7 with big old wolferace on it. 7" I think with something like 225 tyres. Bounced down the road like Zebidee, felt like a beach buggy.

[Eugene7]

With around 210 BHP, and limited slip diff, the wider rubber is a choice I've been thinking of for some time.
With the 021Rs I could easily break traction at the rear...
I'm not 100% convinced, but feel I owe it to myself to try.

[Eugene7]

As Toyo recommend 5.5-7.5 rims for the 205 tyres I think my 6 rims will be ok.
I did also check with George Polly, and he also says they will be ok... if a little 'ballooned'.
(Little was his word. I have no idea if it will look too much or not, but I can live with it for the duration of one set of rears...)

I do have an issue as I run an Ital axle, and it is difficult to get different size rims of my type for that PCD now.

I did also check with this site: http://www.tyresizecalculator.com/tyre-wheel-calcu...
(Not sure if it is that accurate thought...)

[Eugene7]

We are also trying to collect info on different sump clearances here: http://www.7-dna.com/forums/index.php?action=vthre...
The more the merrier...

[john7]

My A021's are also wearing a little thin and I was thinking about the Rain Experts to maintain the 70 profile but what about the Avon CR322 - 185/70x13? Are these any good for road use?

[Skyedriver]

Hi Eugene , have you got the 205's onto the 6" rims yet?
Cheers
T

[Eugene7]

Got the tyres - will be fitting next week!