Valve stem and tire fit question

wrickm · Jun 19, 2015

I am replacing my tires/tyres with some nice fenderal 235/85 r16's i got. These are replacing the tubed 7.5's. My tire fitter seemed to think the tire will fit fine being tubeless but mentioned i needed larger valve stems than what he carries. A little research show 5/8ths or .625 should be what i need, Can anyone confirm all of this for me before i run out?

divie · Jun 19, 2015

I have not got a bare rim to measure but size sounds about right. My concern would be suitability of series rims with tubeless tyres. I have always run them with tubes fitted, hence the bigger valve stem size.

nickjaxe · Jun 19, 2015

Had tubless on my std old style rims for years...with no probs as long as the wheel rim is not rusty on the bead....I got my valves off ebay.... type number TR415. mine are 19mm on the bit that sits in the hole.

http://www.ebay.co.uk/itm/5-X-TR415...709?pt=LH_DefaultDomain_3&hash=item19f67799dd

Nick.

wrickm · Jun 19, 2015

nickjaxe said:
Had tubless on my std old style rims for years...with no probs as long as the wheel rim is not rusty on the bead....I got my valves off ebay.... type number TR415. mine are 19mm on the bit that sits in the hole.

5 X TR415 TUBELESS TYRE VALVES LANDROVER TRACTOR 4X4 TYRE | eBay

Nick.

I just tried .625" or 15.88mm wide valves and they leak. and are genrally too loose. i will look for 19mm

wrickm · Jun 23, 2015

Anyone else have any advice on this. i can't find anything larger than a .625 rim hole, and that is not big enough.

nickjaxe · Jun 23, 2015

Have you not tried the 19mm type???Part number TR415...they should be the correct ones.

I gave you an ebay link.

Nick.

Thor1950 · Jun 23, 2015

wrickm said:
I am replacing my tires/tyres with some nice fenderal 235/85 r16's i got. These are replacing the tubed 7.5's. My tire fitter seemed to think the tire will fit fine being tubeless but mentioned i needed larger valve stems than what he carries. A little research show 5/8ths or .625 should be what i need, Can anyone confirm all of this for me before i run out?

Sounds like you are trying to make a tube rim into a tubeless rim. Valve stem hole gives it all away

wrickm · Jun 23, 2015

nickjaxe said:
Have you not tried the 19mm type???Part number TR415...they should be the correct ones.

I gave you an ebay link.

Nick.

It says right in the add you gave me that they fit 15.7mm rim hole. That's the 5/8" that i have already tried and it was too small.

wrickm · Jun 23, 2015

Thor1950 said:
Sounds like you are trying to make a tube rim into a tubeless rim. Valve stem hole gives it all away

True, but i had been told that the tubeless rim could accommodate the tubeless tire. Possibly i misunderstood. i am thick like that.

Thor1950 · Jun 24, 2015

wrickm said:
I am replacing my tires/tyres with some nice fenderal 235/85 r16's i got. These are replacing the tubed 7.5's. My tire fitter seemed to think the tire will fit fine being tubeless but mentioned i needed larger valve stems than what he carries. A little research show 5/8ths or .625 should be what i need, Can anyone confirm all of this for me before i run out?

wrickm said:
True, but i had been told that the tubeless rim could accommodate the tubeless tire. Possibly i misunderstood. i am thick like that.

Your first post sounds as if they are tube rims.

Go to NAPA or a tire city shop, or another national parts store. Or even a agricultural store

wrickm · Jun 24, 2015

Thor1950 said:
Your first post sounds as if they are tube rims.

Go to NAPA or a tire city shop, or another national parts store. Or even a agricultural store

They are, I am sorry, i just miss-typed.

dominicbeesley · Jun 24, 2015

If the rims are riveted together instead of welded then you should fit inner tubes. You can do that fine with most tubeless tyres so long as anything that might pop the inner tube is removed (large bits of mold overrun and stickers). You need to find a tyre shop that knows about Land Rovers - maybe not so easy in the States? Until quite recently Land Rover fitted tubeless tyres to tubed rims with a tube.

I've seen plenty of people that run tubeless on tube rims but it is a risk as the bead-holder is not really designed for it.

This is what I have been told by the local tyre man - he's a well respected agricultural / Land Rover / 4x4 specialist (and charges accordingly). He says the main problem with putting tubes in tubeless tyres he's seen is fitters leaving stickers on the inside which tend to rub on the tubes and cause them to fail.

Personally I prefer tubes - last set of tubeless tyres with tubes never needed any air except when I'd deliberately let it out to get out of mud and I could let them right down to do that without losing a tyre.

300bhp/ton · Jun 24, 2015

nickjaxe said:
Had tubless on my std old style rims for years...with no probs as long as the wheel rim is not rusty on the bead....I got my valves off ebay.... type number TR415. mine are 19mm on the bit that sits in the hole.

5 X TR415 TUBELESS TYRE VALVES LANDROVER TRACTOR 4X4 TYRE | eBay

Nick.

Running tubeless on rims that require tubes is both stupid and dangerous. And shows a complete lack of understanding of obvious and basic physics.

300bhp/ton · Jun 24, 2015

wrickm said:
I am replacing my tires/tyres with some nice fenderal 235/85 r16's i got. These are replacing the tubed 7.5's. My tire fitter seemed to think the tire will fit fine being tubeless but mentioned i needed larger valve stems than what he carries. A little research show 5/8ths or .625 should be what i need, Can anyone confirm all of this for me before i run out?

Can't help with the valves, although never an issue in the UK.

But do check your rims are tubeless rims. It has nothing to do with rivets or about looking air tight. It's about if the tyre bead will stay seated or not.

It's really obvious which is which:

The tubed is on the right. Note after the outer flange, the main parts of the inner rim are completely smooth and flat.

The rim on the left has an extra bulge, this bulge/lip is there to stop the tyre bead moving towards the centre of the rim. Something that could happen bumping a curb, pot hole or off road. Or even under cornering.

If you fit tubeless tyres with no tube to the rims on the right, you run the risk of the tyre deflating instantly with the tyre coming off the rim. More likely to happen at high speed and could be very dangerous.

You can run tubeless tyres on tubed rims fine, but you must still put a tube in them.

Thor1950 · Jun 24, 2015

dominicbeesley said:
If the rims are riveted together instead of welded then you should fit inner tubes. You can do that fine with most tubeless tyres so long as anything that might pop the inner tube is removed (large bits of mold overrun and stickers). You need to find a tyre shop that knows about Land Rovers - maybe not so easy in the States? Until quite recently Land Rover fitted tubeless tyres to tubed rims with a tube.

I've seen plenty of people that run tubeless on tube rims but it is a risk as the bead-holder is not really designed for it.

This is what I have been told by the local tyre man - he's a well respected agricultural / Land Rover / 4x4 specialist (and charges accordingly). He says the main problem with putting tubes in tubeless tyres he's seen is fitters leaving stickers on the inside which tend to rub on the tubes and cause them to fail.

Personally I prefer tubes - last set of tubeless tyres with tubes never needed any air except when I'd deliberately let it out to get out of mud and I could let them right down to do that without losing a tyre.

Nothing to do with land rover. A tube rim is a tube rim simple. What he needs to do is either put tubes in them new tires or buy new rims to fit, which will be very easy to find in the states. Best choice is buy new rims, which would cost about the same as new tubes, but with much less problems down the road

nickjaxe · Jun 24, 2015

Just measured an old rim I have and its a tad over 15mm so TR415 should be right...you have to snap em into place you know.

I have run my tubeless tyres at quite low pressure and never had one come of the rim....run them for years as lot of other Landrover guys do...not a prob.

Nick.

Blackburn · Jun 24, 2015

Nick
I have purchased some from your link for my modular wheels.
Hole in wheel 15.45mm old valve stem 17.11mm new valve stem 18.94mm .
Look good to me.

Doug

Valve stem and tire fit question

wrickm

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divie

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nickjaxe

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wrickm

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nickjaxe

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wrickm

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300bhp/ton

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