Thread: Running tubeless on tube type rims

Originally Posted by mark2

Does anyone have any direct experience with running tubeless on older style tube type rims? (tube type 130 rims in this instance)

I know the rim profile is supposed to be slightly different betweeen the two types of rims, but are there any real safety issues?

How flat does the tyre have to be before it can potentially roll off the rim?

If it has to be almost completely flat, whether it stays on or off the rim isnt going to make much difference from a safety point of view.

I'm currently trialling running without tubes and no issues with holding pressure so far. Having said that, I havent aired down yet. If there is a compelling and convincing reason for putting the tubes back in, I'll do it but so far, I'm yet to be convinced.

from your above paras....

1. yes - you will find that they hold air as well as tubes do

2. yes - as you know the tyre can potentially roll off the rim

3. flat - as in the event of sudden deflation

4. it does, the experts say

the other issues which I'm sure others will also raise are legal & moral liability for yourself, your passengers and other road users (and insurance)

you can and legally providing the profile fits the tyre.

try hard enough and you can roll a fully inflated tyre off of the rim.... generally tho 15 psi is considered about the limit for a tubeless tyre (Ive been known to goto less than half that under some circumstances)

that said....

the issues you will most likely have,

1. the valve hole for a tubed rim is larger than the hole in a tubless rim, there are valves that fit in and do the job BUT its possible once youve aired down to push the valve back into the rim and not get it back without dismounting the tyre (the new rubber on the front of fozzy did this to me 130 HD rims)

2. If you run a tubed tyre without a tube in it you can have problems as they are not gaurenteed to be air tight, once they start to heat up they can leak and delaminate.

3. if you dont have the "lip" on the inside edge of the rim cornering at low pressure make rolling the bead in significantly easier... IMHO this is massively off set by the ease of changing the rubber on the "lipless" rims but its still worth considering if your planning on doing a lot off stuff where you will be aired down... a tubless thats unseated on one side is fairly easy to get back on with just a compressor and gravity once both sides are off its time for some other trickery to get involved, ITs not hard its just different.

Originally Posted by mark2

Does anyone have any direct experience with running tubeless on older style tube type rims? (tube type 130 rims in this instance)

I know the rim profile is supposed to be slightly different betweeen the two types of rims, but are there any real safety issues?

How flat does the tyre have to be before it can potentially roll off the rim?

If it has to be almost completely flat, whether it stays on or off the rim isnt going to make much difference from a safety point of view.

I'm currently trialling running without tubes and no issues with holding pressure so far. Having said that, I havent aired down yet. If there is a compelling and convincing reason for putting the tubes back in, I'll do it but so far, I'm yet to be convinced.

Did it unknowingly for 6 months, never thought to check. never had an issue, aired up and down multiple times no dramas. only reason i didn't keep it like that is the tyre mob wouldn't put the new tyres on withought tubes.

I dont see why you want to, there is very little advantage other than the price of the tubes.

It is possible, it's not safe and not recomended.

If you are hell bent on doing it then I suggest you purchase (for about 10times what tubes would cost) a set of soft locker bead locks.

These will assure that your tyres stay on.

By the way, the tubes do very little to keep the beads seated anyway, they just make it easier to reseat the beads if the tyre becomes unbeaded and the tyre wont go down if it becomes unbeaded.

Tubes also make sure you have an air tight envelope (unless punctured) which with rims which are not designed for tubeless running are not guarenteed to be airtight.

Mark2

As far as I know it is illegal to run tyres without tubes on tube type rims and will void your insurance - so beware.

Christopher

I ran tubeless tyres on one 2a and two series 3 models with stock rims for years and have run them on my defender for ten years.I would never fit a tube tyre again on any of my vehicles.I have done more traveling than most and have never had a single problem,I can't remember the last time I have even had a flat. Pat

Originally Posted by PAT303

I ran tubeless tyres on one 2a and two series 3 models with stock rims for years and have run them on my defender for ten years.I would never fit a tube tyre again on any of my vehicles.I have done more traveling than most and have never had a single problem,I can't remember the last time I have even had a flat. Pat

You know you can fit a tube to a tubeless tyre with very little ill effect.

You cant fit a cross ply tyre or a rag without a tube and you cant fit any tyre on a split rim without a tube.

It is not recomended and possibly makes your vehicle unroadworthey if you fit a tyre tubeless without a safety bead.

The worst thing that can happen when fitting up a tubless tyre with a tube is that if it does start to deflate it can damage the tyre due to a little extra heat but if they are properly inflated (even when deflated for off roading e.g.not below 15PSi) then there is no difference between the 2 ways so why the hell wouldnt you just fit the damn tubes.

Im still trying to come to terms with **** is the benifit of not having a tube fitted.

Originally Posted by mcrover

You know you can fit a tube to a tubeless tyre with very little ill effect.

You cant fit a cross ply tyre or a rag without a tube and you cant fit any tyre on a split rim without a tube.

It is not recomended and possibly makes your vehicle unroadworthey if you fit a tyre tubeless without a safety bead.

The worst thing that can happen when fitting up a tubless tyre with a tube is that if it does start to deflate it can damage the tyre due to a little extra heat but if they are properly inflated (even when deflated for off roading e.g.not below 15PSi) then there is no difference between the 2 ways so why the hell wouldnt you just fit the damn tubes.

Im still trying to come to terms with **** is the benifit of not having a tube fitted.

I have been running tubes in tyres since I came to Australia in 1982 - My expedition vehicle has 130 rims tube type with tubeless tyres fitted with tubes - after 26 years of travel in some of the harshest conditions in Australia I have no intention of changing (My other Landrover has tubeless tyres fittted to tubless type rims). On several occassions having tubes fitted got me home after cuts to tyres that would have rendered them useless without tubes. By all means fit tubeless tyres without tubes but fit them to tbeless type rims for your own and other's safety. On two recent trips to the remote outback most of the station vehicles I saw had 7.50 16s on split rims with tubes - and these vehicles are relied upon in parts of the country where vehicle failure of any kind is life threatening. They use the tyre rim combination with good reason.