Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


Minimum tubed tyre pressures for offroad/trials?

Reply to topic
Bike Chat Forums Index -> Offroad & Supermoto
View previous topic : View next topic  
Author Message

stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
Karma :

PostPosted: 18:22 - 21 Nov 2022    Post subject: Minimum tubed tyre pressures for offroad/trials? Reply with quote

Got some mates coming to do a long distance trial with me next year. Total novices.

I run stupidly low tyre pressures in my trials bike and still struggle for grip. Like 6psi for the slithery mud you encounter on this trial. I've got heavy duty tubes, oko anti-puncture goop and rim locks.

Couple of the guys will have bikes running tubeless rims with roadgoing enduro-style tyres (there is a special class-x which allows non trials compliant tyres for people wanting to dip their toe in the sport). I was wondering if there's a working minimum before you risk them coming off the rim? It'll be mostly low speed stuff. Max speed limit on offroad sections is 15mph. Tyres can be pumped up again for road sections.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
 Back to top
View user's profile Send private message You must be logged in to rate posts

Copycat73
World Chat Champion



Joined: 11 Jan 2013
Karma :

PostPosted: 18:34 - 21 Nov 2022    Post subject: Reply with quote

no rim locks ... wouldn`t drop below 25 .. front or rear .. but then again i dont ride in the slop .. frankly they are dammed either way ..
____________________
Whatever I post I have no citation and no intention of providing one..
caveat emptor
 Back to top
View user's profile Send private message You must be logged in to rate posts

tatters
Exxon Valdez



Joined: 04 Jan 2004
Karma :

PostPosted: 22:41 - 22 Nov 2022    Post subject: Reply with quote

Min 20 PSI for tubed tires with no rim locks

Min 15 PSI for tubeless tires. The bead of a tubeless tire will hold on the rim a lot better than a tube type tire at lower pressures. I would be more worried about bending/denting a rim from rocks at lower pressures than a tire coming off the rim, and a tubeless tire rotating on the rim is not going to rip a tube valve off as you would get with a tubed tire.

Have ran both a KTM 1190 and a R100GSPD both big heavy bikes at 15 PSI offroad in sand/mud with no issues.
____________________
Past:NRG50,AF1125(x2),NSR125RR,ZZR250,CX500,VFR400,KR1S,ZZR600(x2),CB400N,YZF1000(x2),KH125,Z200,FX400R,CBR954RR(x2)GPZ500S,GT550,VFR750F(x2),RD350N,XR650R,CBR600F,CB250,KDX250,YZF750R,CRM250,400EXC,KLR650,TTR600RE,DR350S,R100GSPD,RGV250,VMAX1200,DL650 Present:G650XC,C12,KZ750,1190ADV
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts
  Display posts from previous:   

Post new topic   Reply to topic    Bike Chat Forums Index -> Offroad & Supermoto All times are GMT
Page 1 of 1

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Read the Terms of Use! - Powered by phpBB © phpBB Group
 

Debug Mode: ON - Server: birks (www) - Page Generation Time: 0.05 Sec - Server Load: 0.24 - MySQL Queries: 17 - Page Size: 37.22 Kb