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I'm not fat, I'm big boned

I forgot to mention the KTM rfs and new SX frames are worth a look too.

a central top spar is lighter than the trelis design

that legal stuff is a pain in the butt, these things come out with hubs "engineered" to be safe but they're not.
 
like i was saying bushy,the japs almost had me brainwashed into thinking their alloy framed bikes were lighter than our steel framed jobby...its good to know the truth now isn't it.
here is a bit more tech jibber for you all in relation to wheel weights.
tubliss front weighed in at 750g,which is 750g lighter than the tube i pulled out(h/duty i think) bridgestone h/duty tube weighed in at 1.5kg.
tubliss rear weighed in at 800g,which is 900g lighter than the tube i pulled out(std tube i think) bridgestone std tube weighed in at 1.7kg
axles weren't weighed with the wheels
front axle assy weighed 275g....total front 9.5kg
rear axle assy weighed 550g.....total rear 12.750kg
how does that compare with your light duty tube set up bushy?
mine has a different looking hub to the later model bergs+ i'm running a shinko base on the retread which weighs 6.1kg instead of the bridgestone/mich/dunlop base which all weighs in at 6.6kg.
i've also noticed when i had to get new spokes for my bike,i compared the spokes to what was on the jap bikes & they have thinner spokes.
so i suppose a bit here & a bit there all adds up.
..weed..
frontwheelcompletewithtublisssystem.jpg

rearwheelcompletewithtublissplusaxl.jpg

18bridgestonesidewallsjpg.jpg

18shinkosidewallsjpg.jpg

<a href="http://s556.photobucket.com/albums/ss7/weed68/?action=view&
tublissrearblownup1jpg.jpg
 
popup

how have you found the tubliss system? how low have you tried the pressures? i run 5LB in the mud and it would be good to know if it rolls and flats or hangs in there?
 
We have guys who finish races after the tire loses pressure using the TUBliss system so I'm sure it works well at low pressure. Lots of conversation about them on KTMTalk.com under the tire section.
 
It would seem that there are considerable weight savings to be made with the tubliss system, thanks to popup and his bathroom scales. i think the trelleborg system maybe even lighter, although i cant prove this yet.
Also the other good thing about these system is, as Crazy Ted says, that even if you get a flat the tyre remains seated, allowing you to nurse it home.
Jock.
 
The other system i refer to as being the trelleborg t lock is actually made by Nitotec, and guess what they are Swedish,

www.nitotec.com

Husaberg owners will undoubtedly get free sets

jock
 
thanks weed its good to know the actual weights. I guessed they weren't that light cause they don't mention the actual weight at all.

I've got some michy light tubes coming will weigh the lot when they get here. the 18" michy UHD 4mm ones are 2kg

I find in the sand with low psi that the tubes wear holes in em from rubbing, never had a proper puncture in the sand. makes me wonder if the tubliss might wear out there is allways a bit of sand in there.

my Talon rear hub is 400gm heavier than stock and the HD spokes are around 500gm heavier.

with the scat track 16 paddle the rear wheel with axle was 15kg! heavier than a stock berg frame/airbox/subframe. I knocked 2kg off with the 8 paddle still have a 1.5kg HD tube in there though. my front hub must be pissweak cause ive got a HD tube in a huge briddgestone 201 and its 9.75kg tot. .

08 KX250 19" rear wheel with a bridgestone intermediate mx is 11kg.

thanks for that link Jock I reckon you could run self tappers through the rim like the high HP hilclimbers to hold the bead out and then maybe seal the rest with tape and that tyre spoodge stuff. there are a lot of pushbike guys doing innovative tubless stuff with soluble latex rubber

there is a guy over your way weed with a wicked cr500 90hp on methanol he changed from a single spar upper steel frame to a perimter alloy one cause a magazine reckoned his bike was ugly, alloy one wasn't any lighter.
 
bushy

have you any weight numbers on a like for like 18" and 19" rear wheel with say a tube and tyre? i would have thought 19" and a low profile tyre would be lighter?

regards

Taffy
 
I think you're right taffy, I don't have any numbers on that I think you would have to use the same hub too to be really definative ie If I got a 19"rim and laced it up to my talon hub with longer spokes then I'd have a result, comparing my 18 to the kx 19 doesn't really work cause Im sure its pissy lil hub and spokes weigh almost nuffink.

I'll work it out one day though :D
 
just weigh the tyres would give a head start and then the rim and spokes or whatever are never going to make up for that!

regards

Taffy
 
orrite on paper going to a 19" rim and spokes adds about 150gm

an SM pro 18" rim is 200gm heavier than the 18" OEM excel

someone needs to weigh tyres, same make same width both new one 19 and one 18 I have all different kinds, the old 18" michy m12 is lighter than the 19"bridgestones so I can't say. the crappy OEM metzeller 6day 18 is as light as some 19"s too.
 
bushy if you can't brake your later model front hub & its lighter than my early type hub,that is improved engineering,good stuff berg/ktm.
obviously the rear hub can't really be any lighter than it already is for the power of a 650,but that doesn't mean ,say a 450 or 380 can't have a different lighter hub.
i think drive train components, can & should be lightened on smaller capacity bikes,rather than just get out of it cheaply by having the same unneccessarily overbuilt/overweight components on both.
taffy i will answer your question shortly on the tubliss thread.
here is a couple of pics showing the weights of the new retreads(same tread on both 18 &19 inch) 1st pic is the 19 ,2nd is the 18.
i forgot to say they are both michelin bases.
looks like about another 1/2 kg(all up) saving by going 19",but its still not really an option for most bush/woods riders,except for someone maybe riding totally in sand.
i can't really see that the trelleborg lock is any different to tubliss,the concept is the same,the inner tube thingy locks the tyre up against the rim when it is blown up.
bushy i can't really see that any sand could get inside the rim,there is 100-110psi of pressure forcing out against the bead of the tyre? maybe i'm wrong,but i don't think so.
cheers..weed..
19michelinsidewallsjpg.jpg

18michelinsidewallsjpg.jpg
 
yeah the front hub is OK The front rim is cracked at the spoke nipples now @ 200 + hrs time for a new one.

the rear hubs should be different from model to model that would be very sensible

the 1/2KG or so saving 19 vs 18 being right out at the tyre should make a noticable difference to handling, 2kg is a huge difference. but yeah its prolly not really gonna be that much better for most applications. the whole wheel assy made from carbon would be the shiznit like roadbikes but it'd be no good in rocks.

be great if the tubliss could keep the sand out sounds like it should, might have to try one if I get sick of homemade stuff :)
 
here is a bit more tech jibber for you all in relation to wheel weights.
tubliss front weighed in at 750g,which is 750g lighter than the tube i pulled out(h/duty i think) bridgestone h/duty tube weighed in at 1.5kg.
tubliss rear weighed in at 800g,which is 900g lighter than the tube i pulled out(std tube i think) bridgestone std tube weighed in at 1.7kg
Click to expand...


Michelin airstop MD tube front 500gm rimlock at a guess is 70gm

rear 18" michelin airstop MF tube 576gm rear rimlock weight approx 100gm.

so its lighter to use the std setup if you don't mind changing tubes every 3000km or so.

you could prolly argue that the tubliss will handle better cause of sidewall fexuralations lower available pressures and it has its mass closer to the axle than the tube but for $15 each I like the tubes in sand. for rocks and stuff that need a HD tube the tubliss would better.
 
wow... bushy thats one light tube!!
that would be the" ducks nuts" for you over there in sand heaven,thats for sure.
it must be as thin as a pushy tube?
i cut open the front bridgestone h/duty tube, just to see how thick the rubber is ,it measures 4.3mm on the bottom & 4.0mm on the sides.(weighs 1.5kg)
i also cut the bridgestone rear(std tube) open it measures 3.9mm on the bottom & 3.2mm on the sides(weighs 1.7kg)
..weed..
 
I have some 18" michelin UHD tubes they say 4mm thick but they weigh 2kg it feels like you could glue on some knobbies and ride it without a tyre.

the light tubes are thicker than the ones that came in my bike from the factory, will see how long they last
 
what we need lads,is tyres & tubes made out of the same stuff virgina's are made of,they seem to cop a pounding & come back better than new.
imagine that...wearing the sharp edge off both knobs & by the time you pull the "scooter" out the shed again for the next ride,the tyres are like new again.
there's gotta be something in it....gotta be..
..weed..
 
Problem being, you wont get out on it as much as you want to, and then once a month they will leak all over the garage!
 

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