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Post by ZRX Gremlin on Mar 25, 2006 10:40:01 GMT
My thoughts are that with tyres you should always follow manufacturers recomendations. They've spent 1000s of Yen in research and development so if they've decided that a 180 section rear tyre is the best option then there must be a good reason for it. Looking on the dark side, if an accident investigator discovers that you have the "wrong" sized tyres fitted, this may well go on record as a contributory factor and the implications of that don't bear thinking about. Is there such a thing as a 185 section rear tyre? Personally I'd go for the 180 A 170 fitted to a wider rim will have an altered profile. Don't know about it turning quicker, I'd have though it would have had the opposite effect as with the tyre being stretched to fit it really ought to have a flatter profile. It raises too many questions. Go for the 180.
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Post by bernard on Mar 25, 2006 10:47:19 GMT
Thanks for reply Gremlin - Heading for M & P s deal on £109 a pair for michelin Mac M90x which was mentioned by you and bikesnoopy earlier , and collect brake lever for Mrs B. since her pride has been repaired as long as i dont mention road cambers at give way junctions :mut:
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Post by ZRX Gremlin on Mar 25, 2006 11:04:23 GMT
Thanks for reply Gremlin dont mention road cambers at give way junctions :agreed: I've literally fallen for this one myself and it's embarrasing. You go to put your foot down and the ground ain't there. By the time you find it the bike's already leaning over too far and gathering momentum under its own weight. :ups: :swear:
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Post by bernard on Mar 25, 2006 11:19:16 GMT
Know that one my mate done it not me honest :bernard:
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Post by bikesnoopy on Mar 25, 2006 11:35:54 GMT
:hmm: Just noticed that the previous owner has put a 170 tyre on the rear should be 180 in the CD manual - 185 in the book manual apparently the narrower the rear tyre the quicker the turn as far as i can blogg out of the net any thoughts :knock2: The "C" model ZZR's had a 170 rear-the "D" models like yours should have a 180. I was reading an article in a trade catalogue recently,about tyres & tyres & tyre sizing. It appears that tyre manufacturers are given guidelines by the industry which allows them leeway as to the actual widths of the tyre. For example,a 180 Dunlop D207 measures approx 192mm accross the tread while a 180 Metz Mez4 measures less than 175. My 190 Mez4 measures exactly 180 accross the tread. The tread width has to be within 10mm(or 5mm each side)of the size as stated on the sidewall...over or under-which explains the huge difference between my "example" tyres. Tyre manufacturers sometimes recommend tyre sizes different to the manufacturers. I'd say that if you buy a tyre that has a particularly wide section-such as the D207-you COULD go down a size. If you choose a tyre with a particularly narrow section-like the Mez4,you could go up a size. My mate has a ZX12R & he always runs a 190 D207 on the back...theyre cheaper than a 200 AND they measure up at 205mm...! Wider than most 200's...!!! Its up to you...but the difference between a 180 and a 170 may not be as big as you think...
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Post by ZRX Gremlin on Mar 25, 2006 14:24:09 GMT
So... According to that logic it would in fact be posible to fit a 180 section rear tyre to the ZRX 1100 without having to change the wheels first? Provided of course you went for something that measures a bit small for its size like a Mez4? and how would this affect the front tyre, assuming of course you were sensible enough to fit a Mez 4 at that end too. I know that fitting a 180 to a stock 1100 has always been advised against and for obvious reasons but you seem to have opened up yet another can of worms. :stir: I thought I knew enough about tyres to get me by but you've got me all confused again.
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Post by bernard on Mar 25, 2006 15:02:40 GMT
Extracted this from somewhere just to shead a bit of light on the matter :stir: Quote:- With regard to the fatter section rear tyre, I am led to believe that if you stick a larger rear section tyre on it will slow down the steering, and lets be honest, thats the last thing you would want to do to the big Z......
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Post by bikesnoopy on Mar 25, 2006 15:27:56 GMT
Grem...ive been saying this for years. Tyre widths vary so much. When i bought my 1100,it had 020's on it-120/170...then i changed them for the Mez4's & knowing that a Mez 4 is a particularly narrow tyre,i went for a 180. When i measured the tyre width with verniers,the 180 Mez4 measures 172mm...while the 170 020 measured 174mm! I got a friend with a ZXR750L1...he put Dunlop D207's(180) on it and it ruined the handling as the 207 was nearly 20mm wider than the BT010's that he took off. I used to sell motorbike tyres in my mountain bike shop(hence the trade accounts)so i got the chance to measure a lot of tyres & you wouldnt believe how much they vary in width. I think the only brands that used to measure somewhere near the size on the sidewall was Bridgestones & Contis...everything else varied wildly...7 you cant tell my that under those circumstances,the manufacturers quoted sizes are gonna make the bike handle great...
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Post by bikesnoopy on Mar 25, 2006 15:29:55 GMT
Extracted this from somewhere just to shead a bit of light on the matter :stir: Quote:- With regard to the fatter section rear tyre, I am led to believe that if you stick a larger rear section tyre on it will slow down the steering, and lets be honest, thats the last thing you would want to do to the big Z...... If you wanna quicken the steering up on a ZZR,simply flip the eccentrics and put a 120/60 tyre on the front instead of a 120/70...it works...
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Post by bikesnoopy on Mar 25, 2006 17:29:13 GMT
I think people talk so much bollocks about tyres. Your comments about the 180 on a ZRX1100 may be true of some tyres,but have the people who shout off about how bad it is ever tried several different types? I think not. Just because one particular tyre doesnt work great on a certain bike,it doesnt mean that theyre all wrong. For example,take the Avon Azaro2. Everyone slated it on the ZRXOC because a couple of people had tried them & they wernt particularly suited to the ZRX(they have very supple sidewalls & thus dont support the weight of a heavy bike too well). . . but mention the word Avon on the ZRXOC board now & youll get shot down in flames. I happen to believe that the Avon AV45/46 combo would be the absolute dogs bollocks on a ZRX.I really cant wait to try them on my Blackbird. If theyre half as good as the Blackbird OC say they are,they should be fantastic. I bet if someone stuck a pair of Pirelli Dragons on a ZRX,theyd slate them,cuz they just dont work on that bike...but would that mean that they'd slate everything else that Pirelli make-Diablos,Super Corsa's etc...i dont think so somehow... I think that pretty much anything thats designed for use on a big heavy sports/tourer kinda bike(including musclebikes)will work well on a big heavy bike. EVERY modern tyre,without exception,on sale today has more than enough grip than you could possibly exceed on the public road & modern sports touring tyres have as much grip as pure sports tyres had just a couple of years ago-and theyre easier to keep up to temperature-and they get up to temperature more quickly...so again,the people who spout about getting a super sticky sports tyre for use on the road are talking absolute bollocks.They really arent nessersary with modern sports/touring rubber being so good. Well,ive gone on enough... All i can say is,dont believe all the bollocks that people talk about tyres...because most of is exactly that - BOLLOCKS...
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Post by bernard on Mar 26, 2006 22:24:49 GMT
Got the M90x ,s today in a 180 just got to fit them now, £109inc vat , got the worst storms today down this end of the globe horrendous :storm: :storm: so the rubber will be on by sunday and i,ll have alook at me cush drive as well bikesnoopy advised me on a few months ago
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Post by bikesnoopy on Mar 27, 2006 6:40:10 GMT
M90X is probably the "sensible choice". You'll not go wrong with them on the ZZR & at that price... If you find a bit of "play" in the cush drive rubbers,you can bodge them with some rubber "fillets". I cut some bits out of an old bike tyre!
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Post by bikesnoopy on Mar 27, 2006 6:58:46 GMT
Im not suggesting that the bodge is the "right" thing to do...merely,if youre a bit strapped for cash & dont want to lob out £35 on a new cush drive just yet,it will make the worn one last a bit longer...thats all...
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Post by bernard on Mar 27, 2006 16:55:46 GMT
:broke: Lob out a mear £47 at busters and m&p,s
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Post by lightspeed on Mar 27, 2006 17:34:32 GMT
Some of the hardcore trackday guys claim that a narrower tire does provide for a quicker turn in, and that the contact patch is not that much different. Going to a larger tire than spec'd for the wheel can actually result in a smaller contact patch as the tire curves in more on the edge to fit the narrower spec rim.
If ya go big, its mostly bling :redcard:
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