homeforumsregister now for free  
 
 
faq
members
calendar
gallery
gallery


Custom Search
  #1  
Old 11th June 2006, 08:28 PM
trichuris's Avatar
trichuris


Regular Forum Contributor

 
Join Date : Apr 2006
Location: Sheffield
Posts: 706
trichuris has a spectacular aura abouttrichuris has a spectacular aura about

trichuris is offline
Tyre pressures?

Rode into Derbyshire tonight as the sun was begining to lower and the intense heat of the day had given way to a cool breeze...great!
Thought I'd check my tyre pressures, just because I never have. The bike came with 2 new tyres (bobbles intact) They are not a pair, front is a michellin macadam and rear is a bridgestone bt45. Im assuming that they are a safe mix as the rear was fitted at MOT the day before I bought it !?! Hope so anyway.
Owners manual says 36psi rear and 33psi front. Rear had 26psi and front 24psi????? Was v. nervous going to 36 and 33. Had visions of exploding rubber and me spitting out bits of bike. Didnt seem to be handling bad, but hey, passed my test 2 months ago so not got a lot of experience under my belt.
Have tried to search for advice on these tyres but cant find much.
Any rubber Gurus amongst you that can advise??
Reply With Quote
  #2  
Old 11th June 2006, 09:02 PM
hmmmnz's Avatar
hmmmnz


Regular Forum Contributor

 
Join Date : Feb 2006
Location: a kiwi living in edinburgh
Posts: 1,350
hmmmnz will become famous soon enoughhmmmnz will become famous soon enough

hmmmnz is offline
its not really a major what pressure you run on as long as you dont exceed whats written on the tyre, on my old xr i used to run as low as 4psi for the mud and up to 36psi for hard packed dirt,
on the gs i like riding on hard tyres around 38psi if its dry.
try different pressures untill you find a feel that you like
__________________
grrrrr
Reply With Quote
  #3  
Old 11th June 2006, 11:06 PM
allym316's Avatar
allym316


GS500 Fanatic

 
Join Date : Apr 2005
Location: Bootiful Gateshead (NOT Sunderland)
Posts: 1,886
allym316 will become famous soon enoughallym316 will become famous soon enough

allym316 is offline
my line is stick to the MANUFACTURERS list of tyre pressures, the ones in the manual are for the STOCK tyres ONLY.. theyre typically Exedras and usually swiftly replaced

I cannot stress that enough as you are certainly not running on stock tyres.

Cant comment on whether thats a safe mix and dont bet on the MOT covering whether theyre safely matched cos all theyre interested in is whether theyre road legal

(Sorry have found that out the hard way lately...dont ask)

Soo, what you need to do it check the manufacturers website for each tyre

My dad was a tyre fitter - servicing fleets of lorries and was service manager for NTS for years... he swore that tyres pressures were critical and not be messed about with...I still tend to hold that line

But I dont profess to be an expert and am merely passing on advice as given to me and I always try to get matched tyres

Ally
Reply With Quote
  #4  
Old 12th June 2006, 08:39 AM
Bob's Avatar
Bob


Member

 
Join Date : Sep 2005
Location: Derbyshire
Posts: 95
Bob

Bob is offline
I run 32psi at the back and 28psi at the front, which is slightly lower than the recommended pressure. I've found that it makes no difference to the handling but is stops the centre of the tyre wearing away too quickly. That's especially important if you do a lot of upright riding (e.g. motorways).

On a couple of occasions over the years where I've felt the need to check the pressure because the handling was noticably "off", the pressures typically encountered were 10 to 14psi, so 4 or 5 psi here or there won't make a difference.

As for the tyre exploding, don't worry about it - most tyres can take 100psi without going bang, in fact when you have a tyre fitted the average dealer will probably stick 50 or 60 psi in to get it to seat properly.
__________________
In times of great trouble, great men drink beer!
Reply With Quote
  #5  
Old 12th June 2006, 09:34 AM
Hodgy's Avatar
Hodgy


GS500 Fanatic

 
Join Date : Sep 2003
Location: Leeds
Posts: 3,123
Hodgy will become famous soon enough

Hodgy is offline
Check the tyres carefully, the Michelins are radial tyres, and the BT45's are crossply, so this mix is not only illegal but dangerous too....

Also always check your tyre pressures before you go out when there cold, as when you ride they get warm and the pressure is higher



Ian
__________________
Reply With Quote
  #6  
Old 12th June 2006, 10:40 AM
trichuris's Avatar
trichuris


Regular Forum Contributor

 
Join Date : Apr 2006
Location: Sheffield
Posts: 706
trichuris has a spectacular aura abouttrichuris has a spectacular aura about

trichuris is offline
Thanks to all for advice.
Hodgy, how can I tell if they are cross ply or steel radial. I'm sh***ing myself now.
Reply With Quote
  #7  
Old 12th June 2006, 10:56 AM
Hodgy's Avatar
Hodgy


GS500 Fanatic

 
Join Date : Sep 2003
Location: Leeds
Posts: 3,123
Hodgy will become famous soon enough

Hodgy is offline
Check out the relevant tyre manufacturers website for details of specific tyres, BT45 deffinatly Crossply, Michelin Macadams I had on my GSX when I got it were Macadam 100's and were Radials, don't know what earlier ones were, but check, better safe than sorry

Bridgestone


Michelin



Ian
__________________

Last edited by Hodgy; 12th June 2006 at 10:59 AM.
Reply With Quote
  #8  
Old 12th June 2006, 12:28 PM
bill's Avatar
bill


Regional Moderator ( North East )

 
Join Date : Jun 2003
Location: Cullercoats
Posts: 6,217
bill has much to be proud ofbill has much to be proud ofbill has much to be proud ofbill has much to be proud ofbill has much to be proud ofbill has much to be proud ofbill has much to be proud ofbill has much to be proud of

bill is offline
Tyre pressures?

You should only check the pressures when the tyres are COLD as Hodgy stated.
bill
__________________
Truth over Chaos

Your Honour Lies in Loyalty

Ride a Moto Guzzi V7 Stone and VFR400 NC30
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:07 PM. - Forum style by ForumMonkeys
Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd. Copyright of www.gs500e.co.uk