heavenly7 Posted October 16, 2002 Share Posted October 16, 2002 I am on Minilite 14" primarily for road use but hopefully the odd track day. This forum previously hightly recommended replacing my Avons with Yoko 21Rs. Sad to say they are not currently available and apparently the wait may be up to a month. Yoko AO48Rs are just out and are meant to be similiar but I wonder if anyone has any knowledge or experience. Yoko A539s are also available but I suspect this is a rather different tyre. Any thoughts please? Link to comment Share on other sites More sharing options...
murph7355 Posted October 16, 2002 Share Posted October 16, 2002 Try 48Rs and let me know what you think of them The tread pattern on 48Rs leads me to believe they won't be as good in the wet as 21Rs. Bet they're very good in the dry... They're definitely going to be the replacement for 32Rs and I'm sure Polley said to me last year that they'd replace 21Rs too, but I could be making that up. Did you get a price on 48Rs? Link to comment Share on other sites More sharing options...
Mark H Posted October 16, 2002 Share Posted October 16, 2002 I have run A539,s they were on my 7 when i bought it NOT very good but that is only my opinion, if you intend to do a lot of road miles it may be worth checking out the BridgestoneRE720 . I use my 7 all year round and have found these to be Very good in all conditions. Many off the carroteers will testify to the reasonable level of grip my 7 has still fast in flares 😬 Edited by - Marc Hicks on 16 Oct 2002 14:57:41 Link to comment Share on other sites More sharing options...
Mike Bees Posted October 16, 2002 Share Posted October 16, 2002 A539 & RE720 aren't in the same league as a Yoko 'R' tyre. The former are straightforward road tyres, the latter are road-legal competition tyres. The difference is night & day. Mike Link to comment Share on other sites More sharing options...
eric Posted October 17, 2002 Share Posted October 17, 2002 I am very happy with 15" yoko A539 Lot of grip wet and dry, impossible to know their limits on road use. However never used 021 or 032 so I cannot compare. Other users will tell you O21 and 032 much more "grippy" but need to be changed 4 times more So in fact depend how milieage you do and how rich are you In fact tyres in two different categories, the best is to try ... Link to comment Share on other sites More sharing options...
V7 SLR Posted October 17, 2002 Share Posted October 17, 2002 I am very happy with 15" yoko A539 Lot of grip wet and dry, impossible to know their limits on road use.[incredulous emoticon] Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
tom7 Posted October 17, 2002 Share Posted October 17, 2002 😬 😬 Tom Link to comment Share on other sites More sharing options...
Nick Woods Posted October 17, 2002 Share Posted October 17, 2002 deleted Edited by - Nick Woods on 17 Oct 2002 13:47:19 Link to comment Share on other sites More sharing options...
deeps Posted October 17, 2002 Share Posted October 17, 2002 Wait for the 21R's , they are a really good allround tyre for a Se7en and the wear rate isn't that bad in road use 😬 Deeps Deep down you know it makes sense. Link to comment Share on other sites More sharing options...
TomB Posted October 17, 2002 Share Posted October 17, 2002 When I got my 7 it had AO21R all round. The rears wore out within a couple of thousand miles of fairly energetic road use. I have replaced the rears with A539s, which although less ultimately grippy, I am very happy with. After a couple of thousand miles, they look hardly used. If anything I prefer them cos with a little less grip, the car is a bit more fun. Fairly cheap too. i guess thats my recommendation! *thumbup* Link to comment Share on other sites More sharing options...
heavenly7 Posted October 17, 2002 Author Share Posted October 17, 2002 I was quoted £55 for the AO48Rs plus the VAT and fitting. Apparently the tread runs further round the edge of the tyre more like a bike tyre. I am tempted to give them a try particularly as 21Rs are apparently not likely to be available for at least a month, but I am a little cautious of trying something new which no one else yet seems to have tested. I must cure this indecisive habit! Link to comment Share on other sites More sharing options...
murph7355 Posted October 18, 2002 Share Posted October 18, 2002 Go for the 48Rs. Yoko Rs are top tyres and I'm sure these will be just fine. I'd offer to swap them with you if you didn't like them but you have 14" rims and I have 13"s. Link to comment Share on other sites More sharing options...
Anthony Posted October 18, 2002 Share Posted October 18, 2002 Are 48R's available for SLR rim sizes ? Regards Anthony X-Flow-power; the real way forward Link to comment Share on other sites More sharing options...
V7 SLR Posted October 18, 2002 Share Posted October 18, 2002 Don't think any Yokos are Anthony. ☹️ Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
murph7355 Posted October 18, 2002 Share Posted October 18, 2002 Que? Do you mean 8.5" rears? Yoko do 215 section tyres and whilst an 8.5" rim is not on the "permitted" column I'm sure they'd still work. I use 205s on a 7" rim despite the "permitted" being 6.5" and they work just fine. Whether 8.5"s is totally necessary on an SLR is another matter. I'm not convinced anything more than 205 section is required, certainly for road use. I've even used 185s on the back on track to reasonable effect (Le Sept this year) but they did wear out quickly Link to comment Share on other sites More sharing options...
scooby dooby doo Posted October 18, 2002 Share Posted October 18, 2002 If you speak to Polley they'll tell you that the permitted rim size column not to be taken as gospel and will advise on suitable rims. Andy, I agree with you regarding SLR wheel sizes - I'm not sure they're beneficial apart from at standing starts. I've gone from 185s (which seem to be the best for up to 150 bhp say) to 205s on 7" as i went to 150 bhp and the rear is far to well stuck down. I'm planning to go to over 200 bhp so hopefully everything will come back into balance then. But 8.5" tyres on an SLR with 190 bhp must surely be over tyred 🤔 or am i speaking out of my 🙆🏻 HOOPY Membership Number 4136 R706KGU Link to comment Share on other sites More sharing options...
V7 SLR Posted October 18, 2002 Share Posted October 18, 2002 You are. It's fine. My car is certainly not "over-tyred". Ask Daren Ball or Nigel Pugh what it was like following me round the horseshoe pass last year (maybe the year before). Although they both kept up, when we stopped at the cafe on the top, both admitted they were less planted on the road than they thought good for them. I, on the other hand, was having fun driving round the outside of the motorbikes who thought they were quick. After our breakfast, one motorbiker came up to me. I thought I was going to end up in a fight for my having overtaken him, but all he said was "Wow. That was your car overtaking us then? what engine has it got?". I am able to keep my foot in on hard corners and other place where others may have to modulate their throttle control. That said, I am never able to keep up with Andy Isherwood on a track, despite him having 6 inch tyres all round and giving away 50bhp to me. Perhaps it's a function of ACB10s over "anything else", but my car is certainly not over-tyred. Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
scooby dooby doo Posted October 18, 2002 Share Posted October 18, 2002 V7 - I assume Daren and Rob were on 32s 🤔 Its possible the difference was due to you being on 32Rs, or possibly your driving skill being better than theirs There must be somebody who's gone from narrow to wide tyres in the same compound... HOOPY Membership Number 4136 R706KGU Link to comment Share on other sites More sharing options...
murph7355 Posted October 18, 2002 Share Posted October 18, 2002 I have. And as noted, 185s were even viable on track. Could get some lovely slides going too, and more easily. But sliding like that isn't the quickest way, hence 205s being my usual choice. With these the whole car is planted very nicely. Car to car comparisons are always hard. Experience with your own car counts for an awful lot, as does making sure the suspension is set up nicely. I'd say both would out weight an extra 15mm on tyre width. People's limits on the road vary enormously as well, which can also add or detract from the comfort zone. I'm assuming the ACBs are 9". Link to comment Share on other sites More sharing options...
V7 SLR Posted October 19, 2002 Share Posted October 19, 2002 No-one's ever accused me of being a "better driver" than anyone. Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
F355GTS Posted October 19, 2002 Share Posted October 19, 2002 So what am I doing wrong? Ex Race SLR 205ish BHP Minister Engine, flat floored, lowered to 55mm under sump, undone rear anti roll bar, 9" rear and 7" front slicks and I can't get the back to stick on slow, medium or fast corners Turn in is brilliant though Mark Link to comment Share on other sites More sharing options...
murph7355 Posted October 19, 2002 Share Posted October 19, 2002 Maybe you're not getting the slicks up to temperature, or maybe they're not in very good nick? Have you tried doing up the anti roll bar? Maybe it's too stiff at the back? Or maybe you're right foot's just too leaden 😬 Didn't mean to suggest that 205s made it impossible to get the back out. Far from it. Just that it feels well balanced with 185 fronts and 205 rears, and when it does go it does so gently. Link to comment Share on other sites More sharing options...
F355GTS Posted October 19, 2002 Share Posted October 19, 2002 Andy roll bar is disconnected, Tyres are used having done one race, definitely not getting enough heat into them even with an extremely leaden foot 😬 when I come off circuit after 15 to 20 mins they are just about warm, 17 cold, 21 hot (or not hot as the case is!) thought about setting up a couple of blow torches pointing at the rear tyres unless anybody else has any ideas ps will be dropping the rear 1 - 2 turns at Spa if problems persist but don't want to lose the turn in particularly for Eau Rouge BTW I wasn't suggesting 185/205 wasn't right, I think I might be guilty of hijacking looking for a solution for me Mark Link to comment Share on other sites More sharing options...
scooby dooby doo Posted October 19, 2002 Share Posted October 19, 2002 V7 - 😬 😬 😬 😬 HOOPY Membership Number 4136 R706KGU Link to comment Share on other sites More sharing options...
murph7355 Posted October 19, 2002 Share Posted October 19, 2002 Have you ever tried narrower rears? I wonder whether a narrower width (7"s all round perhaps, or maybe 8"s on the rear) might allow you to get more heat into them, thus making them stickier? I'm also told that you need to build up heat in slicks "gently", i.e. a few sane laps before going for it. Have you tried the car with the arb connected? What springs and dampers are you using? Link to comment Share on other sites More sharing options...
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