del boy Posted July 2, 2002 Share Posted July 2, 2002 I am just about to change my tyres and want to know what advantage there is in changing the wheel size from 14 down to 13 inch. is this a power thing or is the differance not noticeable. also is the cost about the same? Derek Link to comment Share on other sites More sharing options...
scooby dooby doo Posted July 2, 2002 Share Posted July 2, 2002 13" yokohamas (A021R and A032R) tend to be a bit cheaper than 14". The handling is also improved a bit. Dave Hooper - dmch2@lineone.net Link to comment Share on other sites More sharing options...
caterhamnut Posted July 2, 2002 Share Posted July 2, 2002 Hoopy, as someone who has absolutley no experience of buying 13", is that right? I thought that often 13" were more (less numbers?) Anyway, I think the advantage is lower unsprung weight on the Superlights. teeth.gif21,000 miles in less than a year! cool.gifthumbsup.gif Link to comment Share on other sites More sharing options...
murph7355 Posted July 2, 2002 Share Posted July 2, 2002 Hoopy is correct IMO. 13" rubber is cheaper than 14" by and large and there's more choice of sticky stuff. Handling is improved, though subtly and the rubber choice will make the bigger difference. I moved from 14"s to 13"s 2 or 3 years ago. You won't regret it. Link to comment Share on other sites More sharing options...
JP Posted July 3, 2002 Share Posted July 3, 2002 Have both. I've got 32rs on 13" for summer and 21rs on 14" (they came with the car) for winter / touring. I use my car all year and although the 32rs are great, I wouldn't want to HAVE to have them all the time - standing water can be a bit "trouser-changing". Link to comment Share on other sites More sharing options...
Luke Beaumont Posted July 3, 2002 Share Posted July 3, 2002 Just to throw my 2p in, I'm back on 14" after trying 13" for everyday use. Given that I'm pretty much happy with the A021R tyres and don't fancy changing, and don't have enough power to need bigger rear tyres, these were my reasons: 13" - Better gearing from my CR gearbox, lighter, but just too low for the sort of roads I go on. Did serious gouging to my sump during the trial. 14" - Look better filling the arches. With the 13" I would have ended up shortening the cycle wheel stays. Half inch extra under the sump. Couldn't tell the difference in handling between the two. I have however got a set of 13" for the track though. Link to comment Share on other sites More sharing options...
james fillingham Posted July 3, 2002 Share Posted July 3, 2002 If it helps ... I had 13" with 60 profile and experienced the sump problems mentioned. Swapped to 70 profile 021s - a bit more roll, but outweighed by confidence in ride height on those country lanes / speed humps. Link to comment Share on other sites More sharing options...
Graham Sewell Posted July 3, 2002 Share Posted July 3, 2002 With a live-axle, the 70 profile comes as standard... smile.gif Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
scooby dooby doo Posted July 3, 2002 Share Posted July 3, 2002 I'm afraid i don't *really* buy the ride height argument for using 14" or 13". 13" with 70 profile or using adjustable height dampers can both give you as much clearance as 14" 60 profile. Dave Hooper - dmch2@lineone.net Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted July 3, 2002 Share Posted July 3, 2002 Dave H. I have to say that having seen my Seven (DD) alongside a v. similar car except I have 13" AO21r's 60 profile & he had 13" AO21's in 70 profile the sump clearance was a lot more different than I'd have expected! 70's look huge now in comparison, but they are substantially cheaper from Mr Polley than the 60's!!!! Link to comment Share on other sites More sharing options...
JP Posted July 4, 2002 Share Posted July 4, 2002 I smashed up my oil filter housing while running on the 14's - just take care. Link to comment Share on other sites More sharing options...
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