Hi All, Here is my take on it: Firstly I think the pressure some guys run here are scary hard! but in saying that, it depends greatly on lots of variables. 1. what tyres you run, tubeless/ tube 2. what rims you run 3. diameter and width (26v 29) 4. full rigid, full susser or in between? and probably the biggest factor: 5. the riders experience, riding ability and RIDING STYLE here is what i run on the list above I have 2 bikes: single speed 1. what tyres you run (Maxxis crossmark 2.1 tubeless) 2. what rims you run (ZTR arch) 3. diameter (29) 4. full rigid, full susser or in between? full rigid Bike 2: 1. what tyres you run (Maxxis Ikon 2.2 tubeless) 2. what rims you run (ZTR crest) 3. diameter (29) 4. full rigid, full susser or in between? HT carbon 5. I am experienced, good technical rider that tends to "float over" rocks rather than bash through them. found the faster you go the better it is. I ride smooth and flowing picking smooth lines. I weigh 62kg. On my SS I used to run 0.9bar (13.3psi) front and rear. it was great on everything except fast decents. not cos i was hitting through to the rim, but the bike squirled around a lot. so I now run 1.1bar f &r and to get more stability. I havent burped them yet. I do hit through (to the rim) about 3-5 times a ride. but I am happy with that and it is very very seldomly a hard hit through. On my HT I run 1.5bar only because I am not confident in the strength on the crest rims (running a 1400g wheelset) yet in terms of denting the lip. I haven't hit through to the rim yet on the HT. will be going down to 1.4 bar for the next race. Generally a good rule of thumb is your weight in pounds /6 if you a beginner, or /7 if you want a softer ride So for me: 62 x 2.2 = 136lbs /6 = 22psi = 1.35 bar 62 x 2.2 = 136 / 7 = 19psi = 1.5 bar which is not far off where i am. Mike
