Zoo_rider_01 Posted November 20, 2006 Report Share Posted November 20, 2006 im new to trials and want to know how much i should pump up my tyre because the tyres seem flat on the vids cheers. Quote Link to comment Share on other sites More sharing options...
steve@banbury-trials Posted November 20, 2006 Report Share Posted November 20, 2006 the reason why the tires seem flat is because there at really low pressures so we get more grip as for the pressure for your tires i cant give you an exact number because it depends on loads of factor like your weight , rim width ,tyre size and what type of trials you ride .i would experiment whilst riding ,you'll soon get the right pressure .good luck,steve Quote Link to comment Share on other sites More sharing options...
Conor the basher. Posted November 20, 2006 Report Share Posted November 20, 2006 ye hes right there is not a set presure just have a mess around with them and see what you like Quote Link to comment Share on other sites More sharing options...
F-Stop Junkie Posted November 20, 2006 Report Share Posted November 20, 2006 Urban Myth no. 7: Trials riders run their tyres really low. Motorcycle trials riders do, but a lot of biketrials folk run theirs at sensible pressures (anywhere from 40-60psi). The reason they look so flat is that when you have a high pressure tyre on a point or rail, there is a lot of weight focused on a small area so you get more deformation of the tyre, and hence it looks really soft.The exceptions to this are natural riders who don't do big moves, or very light riders (either in weight, or riding style). Street riders tend to run higher pressures as they require less absolute grip, but need more stability from the tyre to stop it rolling around on the rim. Quote Link to comment Share on other sites More sharing options...
max-t Posted November 20, 2006 Report Share Posted November 20, 2006 Urban Myth no. 7: Trials riders run their tyres really low. Motorcycle trials riders do, but a lot of biketrials folk run theirs at sensible pressures (anywhere from 40-60psi). The reason they look so flat is that when you have a high pressure tyre on a point or rail, there is a lot of weight focused on a small area so you get more deformation of the tyre, and hence it looks really soft.The exceptions to this are natural riders who don't do big moves, or very light riders (either in weight, or riding style). Street riders tend to run higher pressures as they require less absolute grip, but need more stability from the tyre to stop it rolling around on the rim. Bang on Quote Link to comment Share on other sites More sharing options...
Krisboats Posted November 20, 2006 Report Share Posted November 20, 2006 Bang on40 - 60 My rear one was at 15 until i found a pump with a pressure guage and realised it was a bit silly, it then got moved up to 25.my front one was at 8 psi But then i do ride a big bike not one of these kiddie things with huge tyres. Quote Link to comment Share on other sites More sharing options...
abtrials Posted November 20, 2006 Report Share Posted November 20, 2006 low prreasures are good but not to silly, if you have a decent tyre rim and tube you can get away with quite low preasures, without getting pinch flats, you just may need to buy a new rim every once in a while? Quote Link to comment Share on other sites More sharing options...
Rupertbear Posted November 20, 2006 Report Share Posted November 20, 2006 all i can say is experiement, thats what i did. Quote Link to comment Share on other sites More sharing options...
GTF Posted November 20, 2006 Report Share Posted November 20, 2006 Just as you dont flat, the pressure dont have anything to say Quote Link to comment Share on other sites More sharing options...
Ali C Posted November 20, 2006 Report Share Posted November 20, 2006 weigh yourself, then weigh the bike, add them together and devide it by your wheel size (20/26) then times it by your tyre width and then take off your height and then half it again, thats how you work out the correct tyre pressure.or I could be talking bullcrap, start at 25 and add, take out whatever you feel is right for you Quote Link to comment Share on other sites More sharing options...
Tommy d Posted November 20, 2006 Report Share Posted November 20, 2006 (edited) Softer tyres will give you more grip, but make it easier to get punctures and your bike won't roll very well. They can make the bike feel a bit bouncy as well, as if there was suspension. I don't like that but some say it lets you bounce yourself further for bigger gaps etc.Harder tyres will have less grip, although it's not likely to matter unless you ride in the wet or on shiny stuff. Harder tyres will make it easier to spin round on the back wheel, and the bike will roll better, and not feel squishy.Softer tyres wear out quicker.I like about 40psi but everyone's different.EDIT: lol at previous post Edited November 21, 2006 by Tommy d Quote Link to comment Share on other sites More sharing options...
Dan6061 Posted November 20, 2006 Report Share Posted November 20, 2006 I have 10psi in each.Maxxis Creepy Crawlers, and 11st + bike weight on top of that. Quote Link to comment Share on other sites More sharing options...
_Owen. Posted November 20, 2006 Report Share Posted November 20, 2006 rrrrre post http://www.trials-forum.co.uk/forum/index....p;hl=why+so+low sorry mate i did a very simlar topic only about a month ago Quote Link to comment Share on other sites More sharing options...
onzaboy90 Posted November 23, 2006 Report Share Posted November 23, 2006 40 - 60 My rear one was at 15 until i found a pump with a pressure guage and realised it was a bit silly, it then got moved up to 25.my front one was at 8 psi But then i do ride a big bike not one of these kiddie things with huge tyres.cris how could you abuse mods like that u no u love them i run 27 psi it works nice and not to flat on the bk wheel when you do drop and drop gap it is enoght not to rim out on the floor so 27 is the way forward Quote Link to comment Share on other sites More sharing options...
court Posted November 23, 2006 Report Share Posted November 23, 2006 It's down to personal preference.court Quote Link to comment Share on other sites More sharing options...
t33zr Posted November 23, 2006 Report Share Posted November 23, 2006 (edited) It's down to personal preference.courtYes, but right tire pressure can increase youre sidehops height...Tires helps bouncing......To low pressure u can smash the rim...Ho high pressure, u get NO bounce... Edited November 23, 2006 by t33zr Quote Link to comment Share on other sites More sharing options...
shorty Posted November 23, 2006 Report Share Posted November 23, 2006 Do whatever you feel most confortable with, just keep trying it at different levels. but i personally like it flattish because it gives more grip.Josh Quote Link to comment Share on other sites More sharing options...
t33zr Posted November 23, 2006 Report Share Posted November 23, 2006 Do whatever you feel most confortable with, just keep trying it at different levels. but i personally like it flattish because it gives more grip.JoshI did to.....before i realized that my sidehops where bigger with larger tire pressure..... now i dont have to buy a new rim pr month.... Quote Link to comment Share on other sites More sharing options...
superstar Posted November 23, 2006 Report Share Posted November 23, 2006 hia reply to the senior who gave the info about correct tyre pressureswhat units is the height weight etc in to get correct pressurethanksAdie Quote Link to comment Share on other sites More sharing options...
mixmaker Posted November 23, 2006 Report Share Posted November 23, 2006 i make pressure in my rear tyre this way: standing on rear wheel on rail - tyre must be nearly flat.for me - it is ideal pressure Quote Link to comment Share on other sites More sharing options...
poopipe Posted November 23, 2006 Report Share Posted November 23, 2006 hia reply to the senior who gave the info about correct tyre pressureswhat units is the height weight etc in to get correct pressurethanksAdiei have a sneaking suspicion he was taking the piss (apologies if not)its easier than that anyway - put 40psi in each and then let them down a bit at a time till they feel nice to ride on.factors like sidewall thickness, how accurate the pressure guage on your £5 halfords foot pump is, ambient temperature and whether you've had a poo recently or not will all affect the overall feel so it's best to just play it by ear. Quote Link to comment Share on other sites More sharing options...
maxxis26 Posted November 23, 2006 Report Share Posted November 23, 2006 i like 30 psi in the front and 25 psi in the rear. suits me fine and feels quite nice Quote Link to comment Share on other sites More sharing options...
superstar Posted November 23, 2006 Report Share Posted November 23, 2006 i have a sneaking suspicion he was taking the piss (apologies if not)its easier than that anyway - put 40psi in each and then let them down a bit at a time till they feel nice to ride on.factors like sidewall thickness, how accurate the pressure guage on your £5 halfords foot pump is, ambient temperature and whether you've had a poo recently or not will all affect the overall feel so it's best to just play it by ear.yeah mate, i was trying to get him to come back with an equation for it hahaonly a bit of fun hahai run what evers in the tyres till i think they need pumping up then it all starts againcheersAdie Quote Link to comment Share on other sites More sharing options...
Si-man Posted November 23, 2006 Report Share Posted November 23, 2006 130PSI Quote Link to comment Share on other sites More sharing options...
I-LUV-TRIALS Posted November 23, 2006 Report Share Posted November 23, 2006 nah 215psi mate it hurts lol but u have to have metal innertubes Quote Link to comment Share on other sites More sharing options...
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