Air Pressure

I have the Avon 100/90-19 tires and am curious as to what the proper/most popular air pressures should be.

Thanks in advance!

Steve

Rear range 28-34 Front 24-32 are the ballparks with 32 rear & 30 front as most common.
Main fine tune is the Ft to Rr differences which I find best if Ft is 2-3 lb less than rear. If much off this amount I find the front fights with the rear for easy steering or road texture front following feedback. Next fine tune is the harshness or softness of tires back into suspension to pilot. Rough roads feel better if a bit softer, smooth paths tolerate more PSI for secure handling. Tire age matters some too, stiff old tire needs less PSI than new softer one.

While diddling air ***I HIGHLY RECOMMEND, that you find a place with air station and open parking lot or easy low traffic road and lower rear about half down and feel what its does, then pump up and lower front ~ 1/2 and feel that effect, then lower both say 1/3 and get that sensation down pat to you bone marrow - as may save you a spill some day on a slow of fast leak that at first feels exactly like extra wind gusts or road texture wobble to ignore, UNTIL Suddenly control input actions of forks and leaning REVERSE instantly every reflex reaction you developed on normal tire inflation handling. Flats are fairly easy to ride down ONLY if you are aware of what has happened and then just when ya think you got it under control and are about to put feet down it can Fling-Flop bike Wildly out of the Blue and slam ya right down before you can react. Ugh. If leaning when tire blows you must straighten up or tire will roll off rim and fling bike wildly in low or hi side crash. Its happened to me and I prefer to head off road upright like a real man and bail out on purpose before cliff or wall or under traffic encountered. I have saved a rear blow out that de-rimed by supreme will power-fright of tank slapper that broke off fork stem by adrenalized strength till safely off road after flying across oncoming lane bike totally aimmed itself towards with my only effective results being I stayed upright instead of flung off in hi side.

One of my mentors and list moderator on British Iron list, Michael Tagileri who teased me on Ms Peel at Empire rally is in hospital d/t rear blow out on way home. I do not know more details of why rear flat crashed him except that NY roads are so horrible in many turns with traffic they can crash you on good tires if not being super cautious and boringly slow entery. I suspect Mike did not realize what was happening until to late. Will quiz him later but he's had decades on his ratty Combat to learn its quirks but never heard him mention flat tire handling horrors.

Agree with hobot on both tyre pressures and Michael Tagileri a man I've never met but corresponded with, a knowledgeable and real good bloke.

Speedy recovery Mike.

Cash

Running Bridgestone BT-45s, the best I've found is 30F/32R, which is the high end of the range Sir Matt Rambow suggested to me when I bought the tires and rebuilt wheels from him. I've gone as high as 32/34 but the 30/32 seems best IMHO.

I've mostly settled on 2 lb less in front about no matter the total pressure. I tried varying the difference till the steering got the lightest most responsive. I think its something to do with a harder rear not letting the softer front control its thrust from mere road texture following. I can't take much over 30/32 on my factory Combat with new Avons latest but on linked Peel I've pumped up to upper 50 lbs
and she only got smoother and more sure footed. Till I had to return on THE Gravel and had to deflate to my routine 28 rear/26 front or jarred my teeth roots.