Thread: Defender CTIS (Central Tire Inflation System)

'OilWorker' has them on his 130CC that has Bolt on Portals

thats an expensive option, but from what I gather, trying to add CTIS is generally always going to be expensive.

I've seen a system that ran a hose to the hub, outside of the wheel (I'd be worried about ripping it off on a root on a tight track though )

Originally Posted by bond

'OilWorker' has them on his 130CC that has Bolt on Portals

thats an expensive option, but from what I gather, trying to add CTIS is generally always going to be expensive.

I've seen a system that ran a hose to the hub, outside of the wheel (I'd be worried about ripping it off on a root on a tight track though )

CTIS is relatively simple with portals, but for straight axles, aside from the external system you mentioned that are commonly used on log hauling trucks out my way,the system would be complicated and maybe not too reliable.
I do recall that Timken Bearings in the US a few years ago made available special hub bearings that had a groove on the ID that allowed a thin air tube to be run along the length of the spindle out to a rotary air coupling inside the halfshaft drive flange and then out through the flange up to the tyre valve stem. Check out the US Pirate4x4.com forum and post an enquiry there if a 'search' doesn'tthrow up the information you require.
Wagoo.

A bloke out of Moe in Victoria makes them.

Air C.T.I.S. Pty Ltd
RMB 7640 / Walhalla Road
Moe, VIC, 3825
Fax: [02]51275339
Mobile:
0427 006546

AIR CTI.

Originally Posted by wuldfasche

AIR CTI.

Once again this system employs external airlines from the body down to the tyres, that IMO are not suitable for use on deeply rutted tracks common in forested areas.
Wagoo.

Originally Posted by wagoo

Once again this system employs external airlines from the body down to the tyres, that IMO are not suitable for use on deeply rutted tracks common in forested areas.
Wagoo.

I tend to agree.

What I do find interesting, is that they show it fitted to a rural fire fighting appliance. I would hope that if a supply line is ripped out, that there would be a system in place to prevent de-flation.

a company called Toad Security in the UK used to do run-flat inserts and a CTIS system, brochures at the time had photos of thier systems installed on defenders, but this was 13-15 years ago

I'd hope they could do away the external airline if one had portal axels...