Trainer wheels optional
that speaks volumes about you. The sticker on the swing arm of my loose change habit recommends s20 OE tyres at 250kpa front and 290kpa rear, guess what, that is 36 42psi, and Asians average IQ is higher than us whiteys and they design and manufacture the machines and quite a few tyres so where does that leave you?Originally Posted by MrMarko
Hardcore Biker
Bridgestone Battlax S20 Tire Pressures
Racetrack
Front (cold): 32 psi
Front (hot—off the track): 34 psi
Rear (cold): 30 psi
Rear (hot—off the track): 34 psi
Street
Front (OEM recommendations)
Rear (OEM recommendations)
^^^yes i'm not blind i do see the review says oem pressures for the street.... it's called idiot proofing and liability of the manufacturer.
Yes the track and street are different... the track is alot stickier in surface and the pressure change of the tyre will be alot more than you'll get on the street and to keep them from overheating you need a lower pressure....
Even then the front and rear hot on the track is at 34 psi front and rear and thats a fully hot temperature.
You are going above that cold on the street with a rougher surface and of course pushing the tyre nowhere remotely near as hard as the track.
even cold you are another 2psi in the front and another 8 psi in the rear above the hot track temps and you expect decent grip out of it?
The other point to note here is the higher the pressure the longer you have to warm up the tyres, it becomes a struggle to get any heat into them and they cool quickly.
For a commuter/ sunny sunday rider this will do the job sure.
That isn't how i ride a motorcycle hence my opinion differs.
To argue with a man who has renounced the use and authority of reason, and whose philosophy consists in holding humanity in contempt, is like administering medicine to the dead.
Hardcore Biker
Yeah it says i know how to ride a motorcycle hard enough on your incorrect tyre pressures i'd slide off the road.
To argue with a man who has renounced the use and authority of reason, and whose philosophy consists in holding humanity in contempt, is like administering medicine to the dead.
Hardcore Biker
Curious how fast you are riding on the street and taking corners.
Forum whore
You don't need to ask, fast enough that for the sake of a few psi different in tyre pressures he'd be doing cartwheels through the bush. Now damn that's fast...
Hardcore Biker
It looks like someone's ego is over-inflated by a few psi
Hardcore Biker
Well, to be fair - he is doing it on a giant porker with brutal warp-factor power.. not a pissy wizzer 600/4..
Hardcore Biker
Well a lower tyre pressure is for corner grip. If someone is running 30psi for straightline sprints and pampering it around corners thats just fucking retarded and grinds my gears when those cunts say 42psi blahblahblah.
I can get my mates busa around corners at double speed quite comfortably eg 45 at 90 or 100 and he keeps tyres at manufacturer recommended of 42. No grip issues on his battleaxes. Im running pirellis but 42 was a bit high and was slipping a bit mid corner if i gassed it so keep it at 40 which is perfect. For the street of course.
Forum whore
Tyre pressures are an individual thing. The bike makers have no control on what brand or type of tyres we put on our bikes, how we ride or our weight. Pillions?, loaded packracks?, sunday hero?, winterless North or cool South? All factors. Dave Moss suggests inflating your new tyres to the makers highest recommended levels, having a run over a repeatable route, then decreasing by 2psi and repeating, until you are comfortable with what you feel.
I am starting that journey with my Busa. Suzuki says 42/42. Does not compute in my brain, but felt good two up with a pillion. However I cant get my head around a 42 front so am slowly decreasing this.Suprising the diference a psi or 2 makes to the feel. Currently at 38f/ 40r. My DRZ400sm-not a light bike- is 25f/29r and my GSXR 600 is currently 34f/36r, depending on the temps of the day and intended use. So many factors it is worth experimenting.
Que?
That's where I set my ZX12R running Metzeler Z8's. I drop 2psi out of each if going for a fang in the wet on a cold day and maybe add 1psi if touring on highly patrolled highways
http://geoffjames.blogspot.com
Spot on
Your recommended 'busa pressures are the same as my old Blackbird. Because of the forward weight bias on the 'bird, coupled with conservative steering geometry, it started to feel wooden and vague if I dropped the front pressure below 42 psi. However, on both my Street Triple and GSX-S 1000, I have run lower pressures than in the manual and they both feel much better for it.
Just out of interest, I did a trackday on the GSX-S at Hampton Downs on a warm day last summer with PR4 sport touring tyres. The instructor recommended that I dropped my cold pressures to 30 psi front and rear. When I came in from one of the sessions, I checked the rear tyre pressure out of curiosity 2 or 3 minutes after stopping and it was 40psi. It would have been a fair bit higher immediately after coming in.
Hardcore Biker
Agree with all that. I would add it depends on the "feel" you prefer. Myself i hate the squirmy feeling of a low pressure and feel the tyre flexing. For someone whos taking corners at 200 sure a low 30s pressure is warranted but on the street you wont last long anyway doing that.
Problem i hear is that guys who say their tyres are fucked after 2000ks of hard riding see that as proof they need low pressure otherwise they'll kill themselves running 40psi. Newflash you rossi wannabes your tyre is fucked and squared off because your pressure is too low not because your a badass rider.
Hardcore Biker
Newsflash
If somebody is chewing out a rear tyre in 2000km on low pressure on back roads its typically not squared off in the middle, more that the sides are gone from cornering.
To argue with a man who has renounced the use and authority of reason, and whose philosophy consists in holding humanity in contempt, is like administering medicine to the dead.
Forum whore
Ummmm could you please explain this paragraph?.
I have always been told that the lower the pressures the quicker the heat build up in said tire and to keep tire from overheating you add pressure to reduce flex which is what causes the tire to heat.
winding up stucky since ages ago
Hardcore Biker
It goes both ways
very low pressure heats up fast and can overheat if too low,
when you get the right pressure it comes up to a good temp and holds it quite well...
going the other way you reach a point where the tyre simply cant get up to a good operating temp and even if it does its struggling to warm up so much that you start cruising a bit on a cold day and the tyre will cool off again pretty quickly....
I mean it isnt rocket science. too low... chew tyres .... too high... not using the tyres potential...
had a really good laugh at the attitude of a few psi difference in a tyre wont cause me to slide off the road and i must be riding like a street rossi to have issues... a few psi makes a massive difference and frankly if you ride your bike like that go buy a cruiser and stop posing on the 1000cc superbike
To argue with a man who has renounced the use and authority of reason, and whose philosophy consists in holding humanity in contempt, is like administering medicine to the dead.
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks