Urgent! Tyre pressures needed fir standard rubber!

Billythebiker

Turbocharged
Joined
Sep 11, 2005
Messages
569
Location
Tiptree, Essex, England
Right good people, finally back in the saddle... Going up to see perds and that in the morn... Shocks are sorted..now need tyre pressures but have had vastly differing advice.. From gents I trust! As low a 30 psi front to 42 and as low as 28 rear to 44 psi! Help me, I'm a confused numpty!

I'm 13st (182lbs) and will be carrying as little as poss for the weekend, riding one up, if that's any help!
 
Last edited by a moderator:
34 front and 42 rear......unless you are darkside in which case anything from 27 to 31 rear. There has been some talk about the front tyre pressure as a result of "cupping" wear but having raised it with my local Triumph guy (who's opinion I respect) he said stick with the 34.

See ya to-morrow!
 
Good to hear ya back on the Rocket, Billy.

I run 36psi cold in the front and 42psi rear when i run a metz.I am running a Goodyear 225/50/16 F1 Eagle now and at 29 psi cold,its sweet!
 
Pretty much with Templar on this one but I go with 38 frount 40 rear ( hot) 42 rear is ok, but tends to slide more under full power in corners.Still.. I prefer over, to underinflation on the R3. Bit heavier, about 17 St. at the moment.
 
The lower the load the lower you can run your pressure. Rule of thumb, for every 50 pounds of extra load, add 1psig. With the bike unladen (other than the 150 lb rider) set to the least pressure. If you are above that add 1 psig, at 50 lbs, add 2 psig, over 150 lbs add 3 psig. Tire pressure should be at max when your bike is fully laden. So at 180 lbs you should be 1 psig above lowest pressure and can carry 20 pounds of gear. more cargo than that add another pound. If you add only a 130 lb passenger add 3 psig. Tire load range is calculated on heat calculations of the contact patch. As you increase load the contact patch increases unless you further inflate the tire. So what you are doing is maintaining contact patch area as close to constant as possible under all load conditions. Grip (friction) is a coefficient of the contact patch size applied to tire compound. If you deflate a tire to 0 psig (flat) and try to push the bike you have a huge contact patch and mondo grip. Run it at 60 mph and the heat generated (friction) will disintegrate the tire.

So there a you have it.
 
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