Tubeless tire valve stems for thick web wheels?

[Vince]

Under 10 minutes,I watched Shane Watts do a bib moose rear tube and tyre in 4 minutes after the first day in the Tralgon 6 day,world endro championships, held in OZ about 15 years ago.Thats with half a dozen 600 mm tyre levers solo as the regs state,Thats gut busting stuff, he did undo the wheel nuts before entering Park Furma though.Thats was after 400ks of world grade dead hard riding.Flabagasing to watch

 

[Sir Sidney Ruffdiamond]

They showed me the tubes that came out - I have done about 2500 miles on the tyres and they were fairly flat before I got her - chap said that one tube was pinched but after 2500 miles I think nothing was going to change as long as the pressures were kept constant - So we don't really have an option now with the fitting BT45s and Activs are tubeless fittings - I did comment to Joe that I need to make sure I have the recovery number because I cant see them making a repair by the roadside

The Finnilec experience was surreal as I had packed up my bike and suddenly I could see this white gunge coming out of the topbox  - thought it was Lemon's drugs - here he is at the Bol Dor  in young dude mode and the Z1000 workhorse - great bike 

 

[markQLD]

...  I now also machine the rims profle to incorporate a safety edge as per "modern" tubless rim design as my lathe will swing an 18 inch rim, this does two things, it lets the tire seat properly as Laverda rims are oversize and it makes for easier tire changes down the line. ...  Keith 

& i can recall seeing some pics about that, so did a bit of searching
http://www.laverdaforum.com/forum/index.php/topic,84634.msg200316.html#msg200316

 

[Dellortoman]

I have a new back tyre to go on the Jota, so I thought I'd go tubeless on the thick web rim this time. The rim actually has a small safety ridge to retain the bead, so it should be OK. Only problem is that it has tyre lever divots on the inside of the flanges where some ham-fisted gorilla has been changing tyres in the years before I owned the bike. I doubt that a tubeless tyre would seal against the chewed-up rim so I took it to a wheel repair shop to get it cleaned up (my lathe isn't big enough to swing a wheel). I asked him to machine a counter-bore for the tubeless valve while he was at it. I'll pick it up tomorrow and fit the tyre. I'll let you know if it all goes according to plan.

 

[LJ-2]

Happy days Sir Sid.