Chachi
14 June 2005, 11:32
I've just got back from Rockingham National Circuit for a track day and my rear tyre is mullered! Plenty of meat in the middle but the edges and really worn.
I know it's a tight and twisty with lots of 2nd & 3rd gear action but the rear has done about 280 miles (Cadwell Park, bit of road riding & Rockingham) and is very near the end of its life.
I'm riding a K4 GSXR 600 with Bridgestone 014's
My mate has got a K4 1000 and his rear is no where near as bad as mine. Is it just my riding or is there something I can do with the rear suspension to make it a bit more kind to tyre wear???
Rear was sliding a lot at the end of the day .... bit disconcerting at times
cheers guys
Rich
Chachi
15 June 2005, 14:12
Anyone?
Been reading in MCN that an overinflated tyre would cause excessive wear on a trackday, but I'd dropped the both front & back 6psi to 30psi as advised on almost every trackday I've been on? Is it possible I've just overheated the tyre?? if so what do I need to do? add more pressure or take it out?
brybusa
15 June 2005, 16:18
I think its summat to do with rebound settings Rich, ill have a read thru my Performance Bikes set up articles, im sure its mentioned in there
My 010 is also shredded so I was trying to rack my brains about this as well, what group was you in?
I was in the novices, red/grey hayabusa
Fantastic evening wasnt it?..and only £60
Chachi
15 June 2005, 22:23
We did the Sunday session, Bright Yellow Gixxer Bullet. Was in novices too, found it to be a very slow group, but it was good for the ego with all the overtaking :)
Definately something wrong though Denee (turn 4 ), had a big slide through the double right hander and nearly high-sided at about 100mph!
Interested in PB setup article... cheers
Would really like to try and work it out before Brands Hatch on 4th July, I'm going to take another tyre with me but if they're only going to last 2 maybe 3 trackdays it's going to start getting really expensive!
Does look quite impressive though :)
screwdriver
17 June 2005, 01:38
Rockingham is notoriously grippy and is a high wear circuit. Dropping pressure means more flex which heats the tyre. Higher temperature leads to higher pressure so your aim is to kindof find a balance. Nine times out of ten the tyres look a lot worse than they are and the rubber soon cleans up. If it has overheated, it won't recover since overheating will have affected the careful vulcanising process, changing the tyres characteristics.
As for suspension settings, put them where it suits your style of riding. Trying to get a good stting for tyre conservation may be one compromise too far. Get it right for you, don't disturb a good working set-up on the premise that it will help preserve your tyres!
My apologies to any tyre techs reading this. This is how I understand things and am happy to stand corrected.
Screwd.
shaunywrx
17 June 2005, 14:00
Would really like to try and work it out before Brands Hatch on 4th July, I'm going to take another tyre with me but if they're only going to last 2 maybe 3 trackdays it's going to start getting really expensive!
Does look quite impressive though :)[/QUOTE]
To be honest, i would'nt really expect to get much more than 2 or 3 trackday's out of a rear tyre anyway, i don't think it's the general wear that's giving you the problem's, it's more than likely the constant heating of your tyre, then waiting 40 minute's (just enough for it to cool down) before you go out again to heat the tyre up, most modern fast road/track tyre's are designed to go through a certain number of heat cycle's before they start to deteriate quite quickly, if when you let them cool down completely they start to look a dark blueish sort of colour, rather than black, that's when there on there way out, some friend's of mine have found that if you buy a set of tyre warmer's and keep them on in between your session's on track, it help's a lot, because the tyre's are still staying at a constant temperature, rather than going through a constant cycle of heating and cooling, although maybe expensive to start with they should save you money (and possibly a highside due to cold tyre's) due to longer tyre life in the long term, something worth considering if you do a lot of trackday's.
I took my bike to get it set up properly after fitting Ohlins stuff.... i'd recommend it 150%
The bikes are set up for the "average rider" - and not necceserily track conditions either.
Get it set up - that will stop the bad tyre wear (or at least make it wear more evenly ;))
Jza