Tyres (yes ... again ...)

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revilla
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Tyres (yes ... again ...)
170bhp SV. Road use only. 15" rims. When I got the car it had dreadful hard old CR500s. I swapped to Toyo R1Rs. They were quite sticky but for some reason I found it tramlined and wanted to weave around. In the end I went to harder T1Rs and quite liked them. They didn't have anything like the same level of ultimate grip, but I quite enjoyed feeling the car moving around a bit. Roll on a few years I'm struggling with them a bit. I think they've just gone a bit hard with age, but they're definitely rather more prone to locking up and when blatting with others, trying to keep up round some corners I'm ending up looking like a drift car! I could just get some more T1Rs, but I fancy trying something a bit softer with a bit more grip (the T1Rs have got almost as much tread on them now as they did 35,000 miles ago). I don't do track at all so I don't need ultimate-grip performance tyres; and while I'd like a bit more grip I'd rather not have something that hangs on until the last minute then chucks you in the ditch! For road use and touring I want something that will handle a bit of water too, so semi-slicks. I don't want to swap away from 15" rims. I don't want to break the bank. ... and I'd like to sort something before the fish and chip run in September. Suggestions and experiences please? Cheers, Andrew
Piers300
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Andrew. I assume your original CR500's were 195/45/15.

On my car, there is virtually no clearance between the bracket for the cycle wings and the tyre. I bought an additional set of Caterham 10 spoke rims and tyres fitted with 195/50/15, but they fouled the bracket on the front. Of course, no problem on the rear tyres.

So to that end, I progressed no further, but I was able to buy one of the last 4 x 195/45/15 CR500's. However, that was a few years ago now, so they are probably getting hard and need to be replaced.

So I'm watching your post with interest.

regards

 

Piers

Nick Bassett
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Switch to 13" wheels Andrew - much better all round! 

Hope to catch up with you at the Fish n Chip run... Driving

Bolter, bolter, full power...

Superlight R # 81

aerobod
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The Nankang AR-1s are definitely a semi slick with very good grip and are available in 195/50-15 size. I was skeptical about buying these tyres at first, but needed a set at short notice after cording my tyres on a track day and had another one coming up, so bought a set in 185/60-13 front and 235/45-13 rear.

I prefer them to the CR500s for ultimate grip and predictability, even though the CR500s were good. They do seem to run a bit wide, though, with the 195/50-15 measuring 201 mm according to their UK tyre site (https://www.nankangtyre.co.uk/products/motorsport/ar-1/). The 13" ones are even wider with the 185/60-13 measuring 200mm on my 13x6 fronts and the 235/45-13 measuring 245mm wide on my 13x8 rears. They do clear the cycle wings and rear Watts linkages on my R400D without a problem, though. This is how close the front wingstay is:

James

mph
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This is purely a +1 post so I can subscribe to updates to the thread Rofl I'm on 15" wheels, and although everyone keeps saying "put 13s on!" I don't want to do that, yet. But I do need to replace the CR500s on the 15s Yes

philwhittaker
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Also, on 15s and CR500s and looking to change (tyres not wheels).  It feels like there should be a guide to wheels and tyres.

New to owning a Caterham -  Caterham 7 Superlight 150 SV

Shaun_E
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I just checked on this excellent guide produced for the club by Avon tyres and ZZS are available in 195/50R15. These would meet your criteria I think (apart from the cost bit maybe). I normally wouldn't recommend a tyre I hadn't driven on but a lot of the club sprinters use these as do some of the racers but they still have a "proper tread" on them. 

I use Kumho V70A in a medium compound for road/track use and supersoft compound for sprinting.They are a good tyre but the sidewalls are a bit stiff for some people's taste in road use. They do have a bit more tread than some of the semi slicks.

If you find any tyre tramlining on the road then you could try a tiny bit of toe-in on the front. I prefer a fair bit of toe out these days as it's mostly used on track but in the past I ran Yokhama A048R and they tramlined quite a lot but a smidge of toe-in helped.

mph
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My only concern with the 50 profile is the size of them, and if they'll actually squeeze under the front wings. I was doing a comparison t'other day via this site and I'm not 100% sure they will. If anyone knows for sure, that'd be fab to know.

Orange
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I have Toyo R888R fitted to 15" wheels on an SV and they fit the front wing stays. (I did tweak them slightly to give a little more clearance to the rear part of the bracket to increase the clearance from circa 3mm to around 8mm - and also make the clearance the same on both sides)

These tyres are in my opinion much better than the admittedly old CR500s that were on it before. I have also found these to be ok in the wet surprisingly.

Mechanical Moz
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I'm also trying to choose a replacement 15" tyre.  Went from T1R to Yoko AD08R last time which was an improvement, both 195/50 and clear the wings and stays by a few mm.

I do some track days so looking at semi slicks this time, R888R are the front runners as I've driven a car with them on and really liked them.  I am intrigued by the Zestino Gredge 07RS soft compound https://www.demon-tweeks.com/uk/zestino-gredge-semi-slick-tyres-2012154/

Nankang NS-2Rs are also on my shortlist as I've heard a few positive reports, the AR-1 seems a little extreme maybe for when I get caught in heavy rain.

revilla
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Thanks all.

The AR-1s are clearly named after me Smile but they do look a bit hardcore ... can they really handle the wet?

I don't deliberately take the car out in the rain but on longer planned trips you often don't get the choice so I at least want something that would remain safe.

The ZZS may be OK but they are a bit more pricey. I must say the R888Rs could be tempting, especially if you (Orange) are able to say they handle OK on the wet.

There seem to be some good prices out there for them too.

Anyone else got any experience of R888Rs?

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm