Moggie Posted February 17, 2015 Share Posted February 17, 2015 I currently have a set of CR500s (175/55R13 front and 205/55R13 rear), however the rears are quite worn and the front left has developed a slow puncture. I'm hence looking for suitable replacements. I use the car (Superlight 150) solely for the road; however hope to do a track day or two later in the year. Do people recommend another set or CR500s or are there other options I should consider? I should add that I drive my seven in all conditions so wet weather performance is also important. Many thanks Link to comment Share on other sites More sharing options...
Stuart Miller 7 Posted February 17, 2015 Share Posted February 17, 2015 Another set of CR500's. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted February 17, 2015 Share Posted February 17, 2015 New CR500 rears and a puncture repair if possible, Link to comment Share on other sites More sharing options...
Area Representative manningpaul Posted February 18, 2015 Area Representative Share Posted February 18, 2015 Although CR500's will be available for the next couple of years I would be tempted to go for the new ZZS's.Janes Weekely gave us a very informative talk at our local meet the other week and based on his experience, and the benefits he outlined, they would seem ideal.Available either direct from Avon at Melksham or BMTR in Birmingham. Link to comment Share on other sites More sharing options...
Kal-El Posted February 18, 2015 Share Posted February 18, 2015 What did he say the benefits were over the CR500? Link to comment Share on other sites More sharing options...
Gregs79 Posted February 18, 2015 Share Posted February 18, 2015 When are the ZZS's available or are they already available? Link to comment Share on other sites More sharing options...
ChrisC Posted February 18, 2015 Share Posted February 18, 2015 From the Avon web site, the ZZS has wet grip C, where as the CR500 has wet grip A, Does this mean less wet grip?I wouldnt want less grip in the wet than the CR500, which I think is the minimum for an all weather road bias 7. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 18, 2015 Member Share Posted February 18, 2015 EU Tyre LabelsJonathan Link to comment Share on other sites More sharing options...
ChrisC Posted February 18, 2015 Share Posted February 18, 2015 So according to the Avon website and the EU lables, the ZZS has less wet grip than the CR500. Link to comment Share on other sites More sharing options...
AdC Posted February 19, 2015 Share Posted February 19, 2015 Whatever tyres you go for, a word of caution about BMTR. Read them the riot act about treating your wheels well. Infront of me they used their feet to kick / push my brand new wheels across the concrete floor as they separated fronts from rears, and looking at the scratched / chipped anodising around the centre hole of three of the four wheels they treat putting them on the balancing machine as a game of hoopla. I won't use them again. Link to comment Share on other sites More sharing options...
AntonyH Posted February 19, 2015 Share Posted February 19, 2015 From the site JK linked to:For clarity reasons, the label does not address too many parameters. For example, it does not address how long the tyre will last, driving in snow, behaviour in aquaplaning or handling on curves.So the ZZS might mean longer stopping distances in a straight line than the CR500 in "the wet" (for presumably one specific value of "wet"?) but the label makes no claim about cornering ability - so the ZZS may (or may not) offer more grip in regular driving.I have no knowledge either way, but the label is clearly not as helpful as may have been thought... Link to comment Share on other sites More sharing options...
Area Representative manningpaul Posted February 19, 2015 Area Representative Share Posted February 19, 2015 The wet rating is very misleading and doesn't relate to the ability of the tyre to clear water when driving through standing water etc. ZZRs have a very good wet rating yet, if you have seen the tread pattern, you would wonder how on earth it was arrived at! I wouldn't place too much faith in the wet rating, looking at the tread pattern and visualising how good it would be at clearing water to maintain that vital contact patch is I feel a much better way?ZZSs should be available as from now but James said that they would probably be in short supply for a while due to demand. Link to comment Share on other sites More sharing options...
Albert Donaldson Posted February 20, 2015 Share Posted February 20, 2015 On the slow puncture, I had this issue with front right, it was actually not the tyre but a small deformation of the inside of the rim, caused I think when the tyre was fitted, used to lose 0.75bar/month. Worth checking rim by spinning with wheel off the ground, and straight edge. Link to comment Share on other sites More sharing options...
Gary Stone Posted February 22, 2015 Share Posted February 22, 2015 When I spoke to Avon the other week the guy said the wet rating is misleading and doesn't relate to clearing water. Also Avon stopped making the CR500 in Nov 2014. So I doubt supplies will last for next 2 year. Mi have ordered the new ZZS. CR500 is old technology now. Things have moved on. Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted February 22, 2015 Area Representative Share Posted February 22, 2015 Erm....correction Avon are still manufacturing CR500s & will be for some time to come.How do I know? Just been down to the Melksham site ( Wednesday 18th Feb in fact) & picked up a set of CR500s FRESH OF THE LINE with all the 'gristle' hanging off them!Avon Motorsport warehause is FULL of them.The only notable thing about 2014 is the change by manufacturers to comply with the new Euro tyre lable regs. Noise, wet performance etc. Link to comment Share on other sites More sharing options...
Gary Stone Posted February 22, 2015 Share Posted February 22, 2015 I stand corrected then.. I must have misunderstood what man at Avon said..I'm still happy to go with the new tyre. Link to comment Share on other sites More sharing options...
Ult-jim7 Posted February 23, 2015 Share Posted February 23, 2015 I would treat yourself to a new set of Avon CR500's if your using on the road plus one or two casual track days per year. Link to comment Share on other sites More sharing options...
CycleSi Posted February 23, 2015 Share Posted February 23, 2015 I use CR500's on my R300 and like them. However, it makes sense to me to go for the latest tyre technology hence considering ZZS's next time.My concern is my current tyre sizes are 175/55 x 13 and 205/55 x 13 whereas the ZZS only comes in 185/55 x 13 and 215/55 x 13. Will the slightly increased width cause any rubbing or other problems? Link to comment Share on other sites More sharing options...
Roger Ford Posted February 24, 2015 Share Posted February 24, 2015 How do I know? Just been down to the Melksham site ( Wednesday 18th Feb in fact) & picked up a set of CR500s FRESH OF THE LINE with all the 'gristle' hanging off them!Are they marked "offroad use only"? I believe Yoko A048 produced after November 2014 are so marked. Link to comment Share on other sites More sharing options...
Myles Posted February 25, 2015 Share Posted February 25, 2015 Same for Ao21s, surely.? Still made, but no longer e-marked for road use? Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted February 25, 2015 Area Representative Share Posted February 25, 2015 These are road/race tyres E marked etc with the new noise/wet/economy label. No 4WD markings/off road markings! Link to comment Share on other sites More sharing options...
CycleSi Posted February 25, 2015 Share Posted February 25, 2015 Anybody....."I use CR500's on my R300 and like them. However, it makes sense to me to go for the latest tyre technology hence considering ZZS's next time. My concern is my current tyre sizes are 175/55 x 13 and 205/55 x 13 whereas the ZZS only comes in 185/55 x 13 and 215/55 x 13. Will the slightly increased width cause any rubbing or other problems?" Link to comment Share on other sites More sharing options...
Guy Lowe Posted February 25, 2015 Share Posted February 25, 2015 7 WONDERS OF THE WORLD and a puncture repair if possibleIt is not advisable to repair punctures on a performance car which generates a lot of heat in the tyres. The integrity of "mushroom" plug type repairs is compromised when they are subjected to high temperatures and can result in a rapid deflation failure. Link to comment Share on other sites More sharing options...
Stuart Miller 7 Posted February 25, 2015 Share Posted February 25, 2015 As above, would never have a repaired tyre on the Caterham. It is worth checking the wheel for leaks either through the split rims (if indeed they are) or around the bead.And CycleSi, in answer to your question, I run both CR500 and ZZR on my imperial chassis SLR and have no issues clearance wise and use the same set-up. It's 65mm under the (dry) sump on the ZZR - never measured it with the CR500. The only thing to watch for is don't stick the balancing weights on the rear wheels in way of the flange on the end of the DD tube.Why don't you borrow a set off someone local to you to try if you are in doubt? Link to comment Share on other sites More sharing options...
CycleSi Posted February 25, 2015 Share Posted February 25, 2015 Thanks for that.Good idea - I'll try and find somebody with a set close 'ish to me. Link to comment Share on other sites More sharing options...
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