ChrisF Posted December 19, 2020 Share For those not sure of the conversions .... 20 psi = 1,38 bar25 psi = 1,72 bar30 psi = 2,07 bar35 psi = 2,41 bar40 psi = 2,76 bar45 psi = 3,1 bar50 psi = 3,45 bar Link to comment Share on other sites More sharing options...
TheoG Posted December 19, 2020 Share For those not sure of the conversions .... 20 psi = 1,38 bar25 psi = 1,72 bar30 psi = 2,07 bar35 psi = 2,41 bar40 psi = 2,76 bar45 psi = 3,1 bar50 psi = 3,45 bar 1 bar = 14.5 psi, just multiply by this number (14.5) to go from bar to psi, divide by this number (14.5) to go from psi to bar. OR use google: https://www.google.com/search?q=bar+to+psi&rlz=1C1CHBD_enZA886ZA886&oq=bar+to+psi&aqs=chrome..69i57j6j0l4j0i395l2.5152j1j15&sourceid=chrome&ie=UTF-8 ChrisF 1 Link to comment Share on other sites More sharing options...
Meezo Posted December 19, 2020 Share 70kgs 25psi F30psi R My broken rim count has gone from 6 months per rim to over a year without destroying a rim. Except when i bailed i my foot went through the front wheel thinusjvrs 1 Link to comment Share on other sites More sharing options...
DieselnDust Posted December 19, 2020 Share Spot on for me. Link to comment Share on other sites More sharing options...
love2fly Posted April 30, 2021 Share This is going to stir the pot I weigh 101kg with 2.35 Ardent Race front and Crossmark 2.25 rear. Pressures 1.1 front and 1.6 rear. I have experimented with tyre pressures and shock and fork presdures ad nauseum and ridden same descents back to back and keep coming back to these pressures. In almost 9000km no pinch flats or damaged rims and only confy as a couch. Any higher and the bike rattles my teeth out. Oh and thats trying 2 forks also Link to comment Share on other sites More sharing options...
Chadvdw67 Posted April 30, 2021 Share This is going to stir the pot I weigh 101kg with 2.35 Ardent Race front and Crossmark 2.25 rear. Pressures 1.1 front and 1.6 rear. I have experimented with tyre pressures and shock and fork presdures ad nauseum and ridden same descents back to back and keep coming back to these pressures. In almost 9000km no pinch flats or damaged rims and only confy as a couch. Any higher and the bike rattles my teeth out. Oh and thats trying 2 forks alsoI am in much the same boat, running a 2.6 up front and a 2.4 at the rear, my pressure varies from 18-20psi up front and 20-24psi at back, I weigh 100ish and haven't had any issues with smashing rims pinch flats, yet, but maybe I just dont ride nearly as hard as I think I do Link to comment Share on other sites More sharing options...
Grease_Monkey Posted April 30, 2021 Share This is going to stir the pot I weigh 101kg with 2.35 Ardent Race front and Crossmark 2.25 rear. Pressures 1.1 front and 1.6 rear. I have experimented with tyre pressures and shock and fork presdures ad nauseum and ridden same descents back to back and keep coming back to these pressures. In almost 9000km no pinch flats or damaged rims and only confy as a couch. Any higher and the bike rattles my teeth out. Oh and thats trying 2 forks alsoDo you use cush core? At a 100kg myself, if I ride those pressures I will take the tyres off the rim if I corner hard and destroy rims in a matter of a few rides. I ride 25psi front and rear, but use a cush core in the back. Edited April 30, 2021 by Grease_Monkey Link to comment Share on other sites More sharing options...
love2fly Posted April 30, 2021 Share Do you use cush core? At a 100kg myself, if I ride those pressures I will take the tyres off the rim if I corner hard and destroy rims in a matter of a few rides. I ride 25psi front and rear, but use a cush core in the back.No Core but rims with 26mm internal width. Link to comment Share on other sites More sharing options...
Grease_Monkey Posted April 30, 2021 Share No Core but rims with 26mm internal width.Sho, so on the narrower side. The last time I ride under 25psi I ended up putting a lekker big ding with a few smaller ones in spank rims (2.5” Minions on 30mm internal rims). Link to comment Share on other sites More sharing options...
V18 Posted April 30, 2021 Share 118kg. 1.8bar front. 2.5 bar rear. No inserts. Just heavy casings. Eddy Gordo 1 Link to comment Share on other sites More sharing options...
matthieup Posted April 30, 2021 Share 118kg. 1.8bar front. 2.5 bar rear. No inserts. Just heavy casings. what size tires? about 119kg with 2.35 tires front and rear (barzo/mezcal) and i've settled on 27psi f and 29psi b Link to comment Share on other sites More sharing options...
love2fly Posted May 1, 2021 Share Sho, so on the narrower side. The last time I ride under 25psi I ended up putting a lekker big ding with a few smaller ones in spank rims (2.5” Minions on 30mm internal rims).I'm not on a DH bike. I ride a 100mm travel xc bike so I disagree that 26mm internal is narrow. The top of the range Scott Spark RC900 is OE with 26mm rims. HE Trek Top Fuels I ride with have 23mm rims. I'm riding 2.35 tyre and not 2.5 etc. I'd snap a fork before pinching a rim. I've finished a ride with my rear at 0.9 after deflating too much on the trail.I don't like my bike shaking itself to priced and when it's fast and twisty I'm in the faster end of riders Link to comment Share on other sites More sharing options...
dasilvarsa Posted May 1, 2021 Share This is going to stir the pot I weigh 101kg with 2.35 Ardent Race front and Crossmark 2.25 rear. Pressures 1.1 front and 1.6 rear. I have experimented with tyre pressures and shock and fork presdures ad nauseum and ridden same descents back to back and keep coming back to these pressures. In almost 9000km no pinch flats or damaged rims and only confy as a couch. Any higher and the bike rattles my teeth out. Oh and thats trying 2 forks alsoHave you checked your pressure Gauge ? eala 1 Link to comment Share on other sites More sharing options...
MudLark Posted May 1, 2021 Share Mostly a pointless discussion without knowing specifics - rim width, tyre, tyre width, weight, terrain, trail or XC etc. General very rough rule of of thumb: somewhere from 1.4 to 2.2 depending. Usually 0.2 more in the back than the front. Figure what works best for you. Link to comment Share on other sites More sharing options...
Mike Mac Posted May 1, 2021 Share Front 29x2.6 30mm internal rim 1.6bar Butcher Rear 27x2.6 30mm internal rim 1.8bar Eliminator. Weight (rider and bike) is 105kg’s and I ride mainly Tokai. I found that I could go lower if not cornering hard, but found that with less than 1.6 in front the tyre could fold during flat turns. Less than 1.8bar on the back and it’s starts to hit the rim on square edged ledges. I also ride with compression damping pretty much fully open on the front and rear, which I do think helps the tyres cope a bit better when slamming into rocks. I would love to get away with less pressure, but the above seems to be about the least pressure I can get away with without having issues. Edited May 1, 2021 by Mike Mac Link to comment Share on other sites More sharing options...
love2fly Posted May 1, 2021 Share Have you checked your pressure Gauge ?Good point. Varied very very slightly from another Topeak. Not enough to matter. As an aside I used to ride Novatek Dragon rims with something like 18mm internal...tyre squirmed a lot and that was 2.2 Edited May 1, 2021 by love2fly Link to comment Share on other sites More sharing options...
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